WO2014002378A1 - Antenna device and portable radio equipment - Google Patents

Abstract

Provided are an antenna device and portable radio equipment in which the antenna performance can be improved. This invention has an antenna device (7) provided with: an antenna element (4); and an electroconductive member (6) deployed in three axial directions; a part of the antenna element (4) and a part of the electroconductive member (6) of the antenna device (7) being disposed near each other so as to overlap in a predetermined plane view, and the plane on which the antenna element (4) is deployed being orthogonal to a part of the electroconductive member (6).

Description

Antenna device and portable radio

The present invention relates to an antenna device and a portable radio. For example, the present invention relates to an antenna device suitable for use in a mobile wireless device such as a mobile phone or a smartphone.

In portable radios such as cellular phones and smart phones, it is necessary to reduce the specific absorption ratio SAR (Specific Absorption Ratio) of electromagnetic waves to the human head, and the antenna element is placed away from the lower part of the case, that is, the human head. Is preferred. However, if the antenna element is placed in the lower part of the case, the antenna performance is easily degraded in the hand-held state where the portable wireless device is held by hand, so some measures are taken so that the antenna performance is not degraded in the hand-held state. is there. For example, in the wireless device described in Patent Document 1, the notch portion is formed on the circuit board, and the folded portion extending the notch portion is formed to reduce the antenna performance deterioration in the hand-held state. I am trying.

In addition, in portable radios such as portable telephones and smartphones, the antenna element can be miniaturized. For example, in the antenna device described in Patent Document 2, a receiver clip for holding a receiver (or a speaker) is disposed apart from the ground, and the fixing portion is also used as a feeding portion to be an antenna element. Although the wireless device described in Patent Document 1 can miniaturize the antenna element, further miniaturization can be achieved by configuring the antenna element with parts used in other applications.

Japanese Patent Application Laid-Open No. 2004-215132 Japan JP 2012-109936

In patent document 1, the reduction of the antenna performance degradation at the time of human body proximity | contact was not enough.

The present invention has been made in view of such circumstances, and in particular, it is an object of the present invention to provide an antenna device and a portable wireless device capable of suppressing deterioration of antenna performance when approaching a human body.

The antenna device of the present invention includes an antenna element and conductive members expanded in three axial directions, and a part of the antenna element and a part of the conductive member overlap in a predetermined plane view. They are closely arranged, and the developing surface of the antenna element and a part of the conductive member are orthogonal to each other.

According to the present invention, in particular, antenna performance can be improved when approaching a human body.

(A), (b) Rear view and side view showing a schematic configuration of a portable wireless device according to the first embodiment of the present invention The figure which shows the structure seen from the back side of the simulation analysis model of the portable radio | wireless machine of FIG. (A)-(c) The figure which expanded the lower end part of the simulation analysis model of the portable radio | wireless machine of FIG. 1 A diagram showing a VSWR of the simulation analysis model of the portable wireless device of FIG. 1 and a VSWR of a conventional configuration having no conductive member Bar graph showing free space efficiency in simulation analysis model of portable radio of FIG. 1 and free space efficiency in conventional configuration (A), (b) The figure which shows the current distribution in the simulation analysis model of the portable radio | wireless machine of FIG. 1, and a conventional structure, respectively Bar graph showing free space efficiency when matching circuit is added to the simulation analysis model of the portable wireless device of FIG. 1 (A) to (d) A diagram showing a simulation analysis model of the portable wireless device of FIG. 1 attached to phantoms of left and right hands of a human body and phantoms of left and right hands and a head. Bar graph showing the efficiency when the simulation analysis model of the portable radio of FIG. 1 is attached to the left hand phantom Bar graph showing the efficiency when the simulation analysis model of the portable radio of FIG. 1 is attached to the right hand phantom Bar graph showing the efficiency when the simulation analysis model of the portable radio of FIG. 1 is attached to the left hand and the head phantom Bar graph showing the efficiency when the simulation analysis model of the portable radio of FIG. 1 is attached to the right hand and the head phantom It shows a portable radio simulation analysis model of the human left and right hands of the phantom in Fig. 1, the improvement amount of efficiency and efficiency in f ₀ -229MHz when mounted on the respective left and right hand and head phantom The perspective view which shows the schematic structure seen from the back side of the portable wireless apparatus which concerns on the 2nd Embodiment of this invention The disassembled perspective view which looked at the portable wireless apparatus of FIG. 14 from the back side (A), (b) The figure which shows the schematic structure seen from the front side and back side of the portable radio | wireless machine of FIG. Bottom view of the lower end portion of the portable wireless device of FIG. 14 Rear view of the lower end of the portable wireless device of FIG. 14 A front view of the lower end portion of the portable wireless device of FIG. 14 The perspective view which carried out the back view of the lower end part of the portable wireless apparatus of FIG. 14 (A) to (c) Bar graph showing the result of measuring the efficiency in the free space of the portable wireless device of FIG. 14, the efficiency in the left hand holding and the efficiency in the right hand holding In the portable wireless device of FIG. _14, it shows an improvement of efficiency and efficiency in f 0 -229MHz It is a figure which shows an example of the internal structure of the portable wireless apparatus which concerns on 3rd Embodiment, (a) is a rear view of a portable wireless apparatus, (b) is a side view, (c) is a sectional view in the AA line. It is an image figure showing an example of a state when a portable radio is grasped with the left hand, (a) is a rear view, (b) is a side view It is a figure which shows an example of an internal structure of the portable radio | wireless machine which concerns on 4th Embodiment, (a) is a rear view of a portable radio | wireless machine, (b) is sectional drawing in a BB line. A diagram showing an example of an equivalent circuit of an L-shaped pattern portion (A), (b), (d) shows a specific example of the adjustment circuit, (c) shows an example of LC parallel resonance reactance characteristics of the adjustment circuit shown in (b) It is a figure which shows an example of the internal structure of the portable radio | wireless machine which concerns on 5th Embodiment, (a) is a rear view of a portable radio | wireless machine, (b) is sectional drawing in a CC line. It is a figure which shows an example of the internal structure of the portable radio | wireless machine which concerns on 6th Embodiment, (a) is a rear view of a portable radio | wireless machine, (b) is sectional drawing in a DD line, (c) is E-. Cross section at E line (A), (b) is a figure which shows an example of the principal part dimension position of the portable wireless apparatus based on 5th Embodiment. (A) A diagram showing characteristics of an antenna operable in three conventional communication frequency bands, (b) An example of characteristics of an antenna operable in three communication frequency bands of a portable wireless device according to the fifth embodiment Figure shown Rear view showing the internal structure of a mobile wireless device according to the seventh embodiment of the present invention FIG. 32 is a cross-sectional view taken along the line A-A 'showing the connection portion of the base end of the ground wire of the portable wireless device of FIG. An image showing a state in which the portable wireless device of FIG. 32 is held by the left hand Rear view showing the internal structure of a mobile wireless device according to the eighth embodiment of the present invention Rear view showing the internal structure of a portable wireless apparatus according to the ninth embodiment of the present invention Rear view showing the internal structure of a portable wireless apparatus according to the tenth embodiment of the present invention B-B 'sectional view in the circuit board connection part of the flexible substrate of the portable wireless apparatus of FIG. 37 The side view which shows the surrounding part containing the ground wire of the portable radio of FIG. 37 The figure which shows the space | interval of the signal wire of the flexible substrate of the portable wireless apparatus of FIG. 37, and a ground wire The figure which shows the dimension of each part of the portable wireless apparatus of FIG. (A)-(d) The figure which shows the dimension of each part of the portable wireless apparatus of FIG. The figure which shows the result of having calculated the deterioration amount from free space efficiency on the dimension conditions shown in FIG.41 and FIG.42 in the portable radio | wireless machine of FIG. 37. Image showing the state when holding the conventional portable radio with the left hand

Hereinafter, preferred embodiments for carrying out the present invention will be described in detail with reference to the drawings.

(The process of achieving one form of the present invention)
In the wireless device described in Patent Document 1 described above, it is necessary to provide a notch in the circuit board, which makes it difficult to arrange components to be mounted on the circuit board. Also, as a matter of course, no parts can be mounted in the notched portion, which hinders miniaturization. In addition, when a functional part such as a vibrator or a microphone or other structure approaches the folded-back portion, the slits formed in the folded-back portion are obstructed by the structure and the antenna performance is degraded.

Further, in the antenna device described in Patent Document 2 described above, since the entire functional component is held by the receiver clip, it is necessary to cover the entire functional component, the shape of the antenna element is limited, and miniaturization is difficult . Also, due to the necessity of arranging the receiver (or the speaker) in the upper part of the case, the antenna element is also arranged in the upper part of the case and the antenna element and the user's head come close to each other. It is difficult to achieve both.

Hereinafter, an antenna device and a portable wireless device which can reduce the antenna performance deterioration in the hand holding state and can miniaturize the device main body will be described.

First Embodiment
FIG. 1 is a rear view and a side view showing a schematic configuration of a mobile wireless device according to a first embodiment of the present invention. In this case, (a) of FIG. 1 is a rear view and (b) is a right side view. As shown in FIG. 1, the portable wireless device 1 according to the present embodiment includes a rectangular case 2, a rectangular circuit board 3 provided inside the case 2, and a lower end side of the circuit board 3. The antenna element 4 is disposed, the feeding portion 5 for feeding power to the antenna element 4, and the conductive member (that is, the conductive member having a volume) 6 expanded in three axial directions. In the same figure, arrow A is upward (Top direction), arrow B is downward (Bottom direction), arrow C is rightward (Right direction), arrow D is leftward (Left direction), and arrow E is front The direction (Front direction) and the arrow F indicate the rear direction (Rear direction). The antenna element 4 and the conductive member 6 constitute an antenna device 7.

The conductive member 6 is not connected to the ground or is separated from the ground and the wiring in a high frequency manner, and may be a functional component such as a vibrator or a microphone. As is well known, the vibrator comprises a motor and a weight eccentrically mounted on the rotation shaft of the motor. The conductive member 6 is disposed near the open end (tip portion) of the antenna element 4. In this case, a part of the open end side of the antenna element 4 and a part of the conductive member 6 overlap in a front view or a back view and are disposed close to each other in the Z axis direction, and the XY plane on which the antenna element 4 expands On the other hand, a part of the conductive member 6 is expanded in the Z-axis direction and orthogonal to each other.

By using the conductive members 6 expanded in such three axial directions and arranging a part of the conductive members 6 close to the antenna element 4, the antenna element 4 itself can be miniaturized and made into a wide band. In addition, by providing the conductive member 6, it is possible to suppress the antenna performance deterioration even in a state in which the portable wireless device 1 is held by hand, that is, in a hand holding state. Further, by disposing the conductive member 6 in the vicinity of the antenna element 4, the space can be effectively used, and the portable wireless device 1 can be miniaturized.

Next, the effect of providing the conductive member 6 in proximity to the antenna element 4 is demonstrated.
FIG. 2 is a diagram showing the configuration of a simulation analysis model for demonstrating the effect of the portable wireless device 1. The figure shows the back side of the simulation analysis model. FIG. 3 is an enlarged view of a lower end portion of the simulation analysis model of FIG. The simulation analysis model is denoted by reference numeral 1A. 2 and 3, the simulation analysis model 1A includes a circuit board 3 on which a wireless circuit (not shown) is mounted, and a metal shield 8 which covers a part of the wireless circuit and is conducted to the ground of the circuit board 3. An LCD reinforcing sheet metal 9 for securing strength of an LCD (Liquid Crystal Display) not shown and securing a ground, a battery 10 for supplying power to the circuit board 3 and a feeding portion 5 for feeding the antenna element 4 And

The circuit board 3 is disposed in a region ranging from approximately the center to the upper end in the Y direction of the LCD reinforcing sheet metal 9. The LCD reinforcing sheet metal 9 is disposed on the front side of the circuit board 3 and the battery 10, and a portion 9a on the lower end side thereof is bent in the vertical direction. The battery 10 is disposed in a region ranging from about the center to the lower end of the LCD reinforcing sheet metal 9 in the Y direction. The circuit board 3 and the battery 10, and the ground of the circuit board 3 and the LCD reinforcing sheet metal 9 are electrically connected to each other by a contact 11 shown by a black circle. The battery 10 is insulated from the LCD reinforcing plate 9. The feeding portion 5 is disposed at the left corner of the lower end of the LCD reinforcing sheet metal 9. The antenna element 4 is disposed on the left side of the lower end of the LCD reinforcing sheet metal 9, and power is supplied from the power supply unit 5.

The conductive member 6 is formed in a rectangular parallelepiped shape, and has a distance of 0.001λ ₀ (see (c) in FIG. 3) on the back side of the antenna element 4 so as to have a portion overlapping with the antenna element 4 in front view. Be placed. The size of the areas overlapping with the antenna element 4 of the conductive member 6, 0.064λ ₀ in the width direction (X), a 0.013Ramuda ₀ in the longitudinal direction (Y). In this case, the design center frequency f ₀ is 1940 MHz, and λ ₀ indicates the wavelength at the design center frequency. The length in the longitudinal direction of the antenna element 4 is 0.144λ ₀ , the length in the lateral direction is 0.013λ ₀ , the length in the longitudinal direction of the conductive member 6 is 0.064λ ₀ , and the length in the lateral direction 0.028λ _0, the distance between the portion 9a of the antenna element 4 and the LCD reinforcing sheet metal 9 is 0.027λ _0.

FIG. 4 is a view showing a standing wave ratio (hereinafter referred to as VSWR) of the simulation analysis model 1A of the portable wireless device 1 and a VSWR of a conventional configuration not having the conductive member 6. In the figure, the vertical axis is VSWR and the horizontal axis is frequency (MHz). The broken line shown in the figure is the VSWR in the conventional configuration, and the solid line is the VSWR in the simulation analysis model 1A. Simulation matching circuit for VSWR is caused to resonate so that the best in the analysis model 1A in _f 0 + 60 MHz has _no, changing only the length of the antenna element 4 to be the best VSWR in f 0 + 60 MHz And optimization. Thereby, the antenna element length in the width direction (X direction shown in FIG. 2) changes according to the configuration, and is 0.144 λ ₀ in the simulation analysis model 1A. In the conventional configuration in which the conductive member 6 is not provided, it is 0.177 λ ₀ . Also, when optimization is performed only with the element length of the antenna element 4 without a matching circuit, it is difficult to make the VSWR the best value, so the antenna efficiency is not good, but the ability of only the antenna device is grasped be able to.

Comparing the bandwidths with VSWR of 3 or less, it is 339 MHz in the simulation analysis model 1A, as compared with the conventional configuration of 235 MHz, and the band of about 100 MHz is wide. As described above, it is understood that, in the simulation analysis model 1A, good characteristics with small VSWR can be obtained in a wide band compared to the conventional configuration.

FIG. 5 is a bar graph showing free space efficiency in the simulation analysis model 1A and free space efficiency in the conventional configuration. In the figure, the left-up hatching bar graph indicates the free space efficiency in the simulation analysis model 1A, and the right-up hatching bar graph indicates the free space efficiency in the conventional configuration. The simulation analysis model 1A is better than that of the conventional configuration in the f ₀ ± 230 MHz band. In particular, at f ₀ -229 MHz, an efficiency 0.8 dB higher than that of the conventional configuration is obtained. As described above, it is understood from the simulation analysis model 1A that wide band performance can be secured while shortening the antenna element length.

FIG. 6 is a view showing current distribution in each of the simulation analysis model 1A and the conventional configuration, where (a) is a current distribution in the simulation analysis model 1A, and (b) is a current distribution in the conventional configuration. In the simulation analysis model 1A, 0.144Ramuda antenna element 4 and the conductive member 6 in the width direction _0, with the area of 0.013Ramuda ₀ in the longitudinal direction, by close in the thickness direction at a distance of 0.001Ramuda _0, The antenna element 4 and the conductive member 6 are capacitively coupled, and a current is induced in the conductive member 6. The coupling capacitance at this time is about 1.8 pF. Conductive member 6, since the thickness direction of the three-dimensional structure that is expanded by the length of 0.023Ramuda _0, in particular, a new current vector in the thickness direction toward the rear side from the front side is generated. By arranging the conductive member 6 on the open end side of the antenna element 4, the conductive member 6 operates as an antenna element, and the electrical antenna element length is extended. As a result, it is possible to secure wide band performance while making the length of the antenna element 4 shorter than the conventional configuration. In the conventional configuration, since the conductive member 6 is not provided, wide band performance can not be secured.

FIG. 7 is a bar graph showing free space efficiency when a matching circuit (not shown) is added to the simulation analysis model 1A. In the figure, the left-up hatching bar graph indicates the free space efficiency in the simulation analysis model 1A having the matching circuit, and the right-up hatching bar graph indicates the free space efficiency in the conventional configuration. The element length of the antenna element 4 is the same as in the case without the matching circuit. Also, the constant of the matching circuit needs to be changed each time the configuration is changed. By adding a matching circuit, overall efficiency improvement can be seen compared to the case without it. In particular, the improvement effect is high in the low frequency band. For _example, the f 0 -229MHz, the efficiency of the conventional configuration is -3.4DB, efficiency in the present invention is -1.4 dB, 2 dB improvement in is observed. Also, at f ₀ -115 MHz, the efficiency in the conventional configuration is -1.4 dB, but the efficiency in the present invention is -0.6 dB, and an improvement of 0.8 dB is observed. In addition, at f ₀ +228 MHz, the efficiency in the conventional configuration is −2.0 dB, but the efficiency in the present invention is −1.6 dB, and an improvement of 0.4 dB is observed. As described above, the addition of the matching circuit reduces the loss due to the impedance mismatch and enables the efficiency comparison with the conventional configuration in the best state.

FIG. 8 is a diagram showing the simulation analysis model 1A attached to the left and right hand phantoms of the human body and the left and right hand and head phantoms. 9 to 12 are bar graph charts showing the efficiency in each mounting state shown in FIG. (A) of FIG. 8 shows a state where the simulation analysis model 1A is attached to the left hand phantom 20, (b) of FIG. 8 shows a state where the simulation analysis model 1A is attached to the right hand phantom 21, and (c) of FIG. Shows a state where the simulation analysis model 1A is attached to the left head of the left hand and the head phantom 22, and (d) of FIG. 8 shows a state where the simulation analysis model 1A is attached to the right hand of the right hand and the head phantom 23. In each of the states shown in FIGS. 8A to 8D, the influence of the approach to the human body was analyzed by simulation.

9 is a bar graph showing the efficiency when the simulation analysis model 1A is attached to the left hand phantom 20. FIG. 10 is a bar graph showing the efficiency when the simulation analysis model 1A is attached to the right hand phantom 21. 12 is a bar graph showing the efficiency when the simulation analysis model 1A is attached to the left head of the left hand and the head phantom 22, and FIG. 12 is a diagram when the simulation analysis model 1A is attached to the right head of the right hand and the head phantom 23. It is a bar graph which shows efficiency. In each of FIG. 9 to FIG. 12, the bar graph on the upper left hatching indicates the efficiency in the simulation analysis model 1A, and the bar graph on the upper right hatching indicates the efficiency in the conventional configuration. In each case, the matching circuit has not been modified from that optimized for free space. In any state, improvement is seen as the free space efficiency is improved. FIG. 13 is a diagram showing the efficiency and the amount of improvement of the efficiency at f ₀ -229 MHz. As can be seen from the figure, it can be seen that the amount of improvement on the right hand is greater than the amount of improvement on the left hand. The reason is that the feeding part 5 of the antenna element 4 is disposed on the left side in the rear view of the simulation analysis model 1A, and the direction of the current flowing in the thickness direction of the antenna element 4 and the conductive member 6 is against the hand. Since the antenna element 4 and the conductive member 6 are close to the thick portion of the base of the thumb, the antenna element 4 and the conductive member 6 are likely to be affected when they are held right-handed. On the other hand, in the left-handed state, since the feeding portion 5 of the antenna element 4 and the conductive member 6 are separated from the thick portion of the base of the thumb, the hand is less affected. From this, the amount of improvement of the right hand is larger than the amount of improvement of the left hand. In addition, the amount of improvement of the left hand can be increased compared to the amount of improvement of the right hand by replacing the present configuration symmetrically. Moreover, in the case of a reception-only system such as GPS (Global Positioning System) which does not require consideration of SAR, the antenna arrangement need not be limited to the bottom side.

As described above, the portable wireless device 1 according to the present embodiment includes the antenna device 7 including the antenna element 4 and the conductive members 6 expanded in the three axial directions, and the antenna element 4 of the antenna device 7 Conductive to the antenna element 4 such that a part of the conductive member 6 overlaps a part of the conductive member 6 in a predetermined plane view, and a developing surface of the antenna element 4 is orthogonal to a part of the conductive member 6 Since the member 6 is disposed, the antenna element 4 itself can be downsized and broadened. Moreover, by having the conductive member 6, the antenna performance deterioration can be suppressed even in the hand holding state. In addition, conductive electronic components such as a vibrator and a microphone can be used as the conductive member 6, and by arranging them in the vicinity of the antenna element 4, the antenna device can be miniaturized.

Second Embodiment
FIG. 14 is a perspective view showing a schematic configuration looking at the back side of the portable wireless device according to the second embodiment of the present invention. FIG. 15 is an exploded perspective view of the back side of the portable wireless device according to the present embodiment, and FIG. 16 is a schematic configuration viewed from the front side and the back side of the portable wireless device according to the present embodiment. It is a figure which shows, (a) is a front view, (b) is a rear view. The same reference numerals as in the portable wireless device 1 of the first embodiment described above in FIGS. 14 to 16 denote the same parts.

The portable wireless device 30 according to the present embodiment includes two circuit boards, that is, first and second circuit boards 3A and 3B, an antenna element (first antenna element) 4A operating in a first frequency band, and An antenna element (second antenna element) 4B operating in a second frequency band different from the frequency band of 1, a vibrator (first conductive member) 31, and a microphone (second conductive member) 32; Prepare. The antenna elements 4A and 4B, the vibrator 31 and the microphone 32 constitute an antenna device 37.

The second circuit board 3B is a substantially L-shaped flexible board, and is disposed on the left side surface and the bottom of the housing 2. The first circuit board 3A is formed in a rectangular plate shape, and is disposed above the second circuit board 3B. Besides using a flexible substrate for the second circuit substrate 3B, a glass epoxy substrate can of course be used, and the effect is also the same. Further, the second circuit board 3B is L-shaped to be connected to the first circuit board 3A, and is not limited to this shape. The first circuit board 3A is connected to the LCD reinforcing sheet metal 9 at the ground contacts 33 at each of the four corners. The base end of the second circuit board 3B is connected to the first circuit board 3A, and the other end is open. On the second circuit board 3B, signal lines and ground lines for connecting functional components of the vibrator 31 and the microphone 32 are wired. A signal for operating the vibrator 31 and the microphone 32 is supplied from the first circuit board 3A through these wires. A reactance (not shown) for blocking a high frequency signal is inserted in the signal line and the ground line of the vibrator 31 and the microphone 32. In order to reduce the wiring influence of the vibrator 31 and the microphone 32, it is desirable to arrange the reactance in the vicinity of these functional components. The first circuit board 3A and the battery 10 are connected via the battery terminal 34.

The first antenna element 4A is disposed on the front side in the thickness direction of the housing 2, and the second antenna element 4B is disposed on the bottom and back sides of the housing 2. Power is fed from the feeding unit 5 to the first antenna element 4A and the second antenna element 4B. The feeding unit 5 is connected to the first circuit board 3A via the coaxial line 35. A high frequency signal is supplied to the first and second antenna elements 4A and 4B from a radio circuit (not shown) mounted on the first circuit board 3A. The second antenna element 4B has a low frequency band (second frequency) of 880 to 960 MHz, for example, so that the first antenna element 4A resonates in a high frequency band (first frequency band) of 1710 to 2170 MHz, for example. The element length is optimized so as to resonate with the band).

Similar to the antenna element 4 of the first embodiment, the first antenna element 4A is formed in a flat plate shape. The second antenna element 4B is branched from the vicinity of the feeding portion 5 of the first antenna element 4A, and is deployed on the back side and the bottom side of the housing 2. A part of the second antenna element 4B has a meander shape, and resonance can be made in a low frequency band of 880 to 960 MHz without increasing the length of the antenna element only in the X direction.

The vibrator 31 has a cylindrical shape and is made of metal. The microphone 32 has a square shape, and a part is made of metal. The vibrator 31 is a vibrator with respect to the first antenna element 4A with respect to the XY plane in which a part of the antenna element 4A and a part of the vibrator 31 overlap in a front view or a back view and the antenna element 4A expands. A part of 31 is arranged to be orthogonal to the Z-axis direction. With respect to the second antenna element 4B, a part of the antenna element 4B and a part of the microphone 32 overlap in a bottom view or a top view with respect to the second antenna element 4B, and the microphone 32 with respect to the XZ plane in which the antenna element 4B extends. It is arranged at the tip of the second antenna element 4B so that a part of 32 is orthogonal to the -Y axis direction. In the vibrator 31, the antenna element 4A is disposed on the front side, the antenna element 4B is disposed on the back side and the bottom side, three side surfaces are surrounded by two antenna elements, and On the other hand, the ± Z axis direction and the −Y axis direction are developed and orthogonal to each other. The overlapping amount of the antenna elements 4A and 4B with the vibrator 31 and the microphone 32 is large, and the smaller the distance between overlapping portions, the easier it is for coupling.

The coaxial line 35 is disposed on the opposite side of the battery 10 to the second circuit board 3B. The vibrator 31 is disposed on the open end side of the first antenna element 4A between the first antenna element 4A and the second antenna element 4B. The microphone 32 is disposed on the open end side of the second antenna element 4B. The vibrator 31 and the microphone 32 are both conductive members. An LCD 38 is disposed on the front side of the housing 2. The LCD FPC 39 is a flexible substrate which is disposed between the LCD 38 and the LCD reinforcing plate 9 in the thickness direction of the housing 2 and electrically connects the LCD 38 and the first circuit board 3A. The metal shield 40 is conducted to the ground of the first circuit board 3A.

FIGS. 17 to 20 are diagrams showing the detailed structure and dimensions of the portion where the antenna elements 4A and 4B, the vibrator 31 and the microphone 32 of the portable wireless device 30 are arranged. FIG. 17 is a bottom view of the lower end portion of the portable wireless device 30. As shown in FIG. In the figure, arrow E indicates the back side, and arrow F indicates the front side. In the portable wireless device 1 according to the first embodiment described above, there is no component between the antenna element 4 and the conductive member 6, and the distance between them is set to 0.001 λ ₀ , but the second embodiment in the portable wireless device 30, the distance between the antenna element 4A and the vibrator 31 and 0.006Ramuda _0, and the distance between the antenna element 4A and the vibrator terminals 31a and 0.003λ _0. A second circuit board 3B is disposed between the antenna element 4A and the vibrator 31. The mobile wireless device 30 according to the second embodiment is physically separated from the mobile wireless device 1 according to the second embodiment in the thickness direction of the housing 2 as compared to the mobile wireless device 1 according to the first embodiment. That is, by disposing the dielectric, the decrease in the capacitive coupling between the antenna element 4A and the vibrator 31 can be suppressed, and the coupling capacitance is approximately 1 pF.

FIG. 18 is a back view of the lower end portion of the portable wireless device 30. As shown in FIG. As shown in the figure, the distance between the LCD reinforcing plate 9 and the vibrator 31 is 0.03λ ₀ , the distance between the LCD reinforcing plate 9 and the microphone 32 is 0.042λ ₀ , and the LCD reinforcing plate 9 and the antenna element The distance between 4A is 0.047λ ₀ (see FIG. 19), and the distance between the LCD reinforcing plate 9 and the antenna element 4B is 0.047λ ₀ . In the portable wireless device 30 according to the second embodiment, the distance between the antenna element 4A and the LCD reinforcing sheet metal 9 is made closer than that of the portable wireless device 1 according to the first embodiment.

FIG. 19 is a front view of the lower end portion of the portable wireless device 30. As shown in FIG. As described above, the distance between the LCD reinforcing sheet metal 9 and the antenna element 4A and 0.047λ _0.
FIG. 20 is a perspective view of the lower end portion of the portable wireless device 30 as viewed from the rear. In the figure, the overlap amount and interval of the vibrator 31 and the microphone 32 and the antenna element 4B are shown.
Antenna element 4B and the front view overlapping portion 50 of the vibrator 31: in the width direction (X) 0.068λ _0, in the longitudinal direction (Y) overlapped by the size of 0.011λ _0, interval overlapping portion is 0.008Ramuda ₀ is there. The coupling capacitance is about 0.7 pF.
Antenna element 4B and the vibrator 31 of the bottom view overlapping portion 51: in the width direction (X) 0.012λ _0, in the thickness direction (Z) overlapped with the size of 0.019λ _0, interval overlapping portion is 0.008Ramuda ₀ is there. The coupling capacitance is about 0.3 pF.
Antenna element 4B and the bottom view overlapping portion 52 of the microphone 32: in the width direction (X) 0.02λ _0, in the thickness direction (Z) overlapped with the size of 0.008λ _0, interval overlapping portion is 0.003Ramuda ₀ is there. The coupling capacitance is about 0.1 pF.

FIG. 21 is a bar graph showing the results of measuring the efficiency in free space of the portable wireless device 30 according to the present embodiment, the efficiency in holding the left hand, and the efficiency in holding the right hand. A bar chart showing the efficiency when placed in free space, so-called, no obstacle around it, (b) is a bar chart showing the efficiency when held with the left hand, (c) is the efficiency when held with the right hand FIG. In these figures, the left-up hatching bar graph indicates the efficiency in the portable wireless device 30, and the right-up hatching bar graph indicates the efficiency in the conventional configuration. The same effect as the portable wireless device 1 according to the first embodiment can be confirmed. FIG. 22 is a diagram showing the efficiency and the amount of improvement of the efficiency at f ₀ -229 MHz. As can be seen from the figure, it can be seen that the amount of improvement on the right hand is greater than the amount of improvement on the left hand. Further, compared with the portable wireless device 1 according to the first embodiment, although the improvement amount of the left hand is not different, the improvement amount of the right hand is increased and the left / right difference is reduced. That is, since the antenna element 4B and the microphone 32 are provided, the improvement effect is increased. Also, although the improvement in efficiency in free space is 1.3 dB, the improvement in efficiency when held with the left hand is 1.6 dB, and the improvement when held with the left is increased compared to free space. ing. Similarly, the efficiency improvement when held with the right hand is 2.3 dB, and the improvement when held with the right hand is also increased compared to free space. From this, it can be confirmed that the amount of deterioration of the hand holding state is suppressed.

As described above, the portable wireless device 30 according to the present embodiment operates in the second frequency band different from the first frequency band and the antenna element 4A operating in the first frequency band, and is branched from the antenna element 4A. The antenna device 37 includes an antenna element 4B, vibrators 31 deployed in three axial directions, and microphones 32 deployed in three axial directions, and a part of the antenna element 4A of the antenna device 37 The vibrator 31 is disposed with respect to the antenna element 4A such that a part of the vibrator 31 overlaps in a predetermined plane view, and a part of the vibrator 31 is orthogonal to a developing surface of the antenna element 4A, and the antenna element 4B Antenna element so that a part of the microphone 32 and a part of the microphone 32 overlap in a predetermined plan view, and a plane on which the antenna element 4B is deployed and a part of the microphone 32 are orthogonal Since so as to position the microphone 32 with respect to B, the antenna element 4A, the size and bandwidth of 4B itself attained. Further, by including the vibrator 31 and the microphone 32 which are conductive members, deterioration of the antenna performance can be suppressed even in the hand holding state. In addition, conductive electronic components such as the vibrator 31 and the microphone 32 can be used as the conductive member, and by arranging them in the vicinity of the antenna elements 4A and 4B, the antenna device can be miniaturized.

In the mobile wireless device 30 according to the second embodiment, the vibrator 31 may be directly conducted to the antenna element 4A. Alternatively, the microphone 32 may be directly conducted to the antenna element 4B.

(The process of obtaining another form of the present invention)
2. Description of the Related Art In recent years, mobile radios represented by mobile phones, smart phones, and the like often use a plurality of operating frequency bands at frequencies from several hundred MHz to several GHz. As portable radios are miniaturized to improve portability and operability, there is a need for high-gain multi-band antennas in multiple frequency bands.

For example, Patent Document 1 below discloses a portable wireless device having an antenna element and a parasitic element, and making the distance between the open end of the antenna element and the open end of the parasitic element close and capacitively coupling There is. The antenna element is disposed at the upper end portion of the housing, at least one place of one end is connected to the signal line pattern on the device substrate, and the other end is an open end. The parasitic element is disposed at the same upper end as the antenna element, at least one place of one end is connected to the ground wiring of the device substrate, and the other end is an open end.

Further, Patent Document 2 mentioned above discloses an antenna device which feeds power to a receiver clip for suppressing a receiver and uses it as an antenna. In this antenna device, an inductor is loaded on a receiver flex close to the receiver clip for electromagnetic coupling to ensure antenna performance.

(Reference Patent Document 1: Japanese Patent Application Laid-Open No. 2006-33798)

The arrangement position of the antenna element in the portable wireless device is generally at the lower end side of the case away from the head at the time of a call from the viewpoint of compliance with regulations regarding local SAR (Specific Absorption Rate) to the human head. . However, when the antenna element is disposed at the lower end side of the housing, the antenna element may be covered with a hand during a call, and the gain of the antenna may be deteriorated to make a good call impossible.

In the portable wireless device disclosed in Patent Document 1, the antenna element is disposed on the upper end side of the housing, and the degradation of the antenna performance at the time of gripping when the antenna element is disposed on the lower end side is not taken into consideration. . In addition to the antenna element, a dedicated parasitic element is disposed, which may increase the size of the portable wireless device.

The antenna device disclosed in Patent Document 2 does not consider degradation of antenna performance due to human approach.

Hereinafter, a portable wireless device capable of suppressing the performance deterioration of the antenna and the electronic component due to the proximity of a human body without providing a dedicated parasitic element will be described.

The portable wireless device may be, for example, a device (for example, a mobile phone, a smartphone) used by being held by the user's hand.

Third Embodiment
23 (a) to 23 (c) are diagrams schematically showing the internal structure of the portable wireless device 201. FIG. FIG. 23 (a) is a rear view of the portable wireless device 201, FIG. 23 (b) is a side view of the portable wireless device 201, and FIG. 23 (c) is a cross-sectional view taken along line AA of FIG. In the following description, the direction of the X axis shown in the figure is the lateral direction (width direction, short side direction) of the portable wireless device 201, and the direction of the Y axis is the vertical direction of the portable wireless device 201 (long direction, long side The direction of the Z axis is referred to as the thickness direction of the portable wireless device 201.

The portable wireless device 201 includes a housing 202, an antenna element 203, a power feeding unit 204, a circuit board 205, a strength sheet metal 206, an L-shaped pattern portion 207, and a functional component 208.

The housing 202 has, for example, a substantially square shape, and is formed of, for example, a nonconductive member. A display panel (for example, LCD (Liquid Crystal Display), not shown) is provided on the front side of the housing 202 (the rear side in the Z direction in FIG. 23).

The antenna element 203 is formed, for example, in a rectangular plate shape, and is an example of an antenna unit. The antenna element 203 is disposed along the lower side of the circuit board 205 at the lower end portion of the housing 202, that is, the lower left end of the circuit board 205 (rear surface side) shown in FIG. In FIG. 23A, one end of the antenna element 203 is connected to the feeding unit 204 at a position close to the left side of the circuit board 205. The other end of the antenna element 203 extends along the lower side toward the right side to form an open end 211.

The antenna element 203 is electrically isolated from the circuit board 205 by a pattern removal area 209 provided on the circuit board 205. The pattern removal area 209 is an area in which no conductor pattern (circuit pattern and ground pattern) is formed on the circuit board 205 (for example, both sides of the circuit board and inside the circuit board 205).

A high frequency circuit for processing a signal transmitted and received by the antenna element 203 is provided on the circuit board 205. The antenna element 203 is fed from the circuit board 205 via the feeding unit 204. Further, the ground of the antenna element 203 is connected to the ground pattern formed on the circuit board 205 at the arrangement position of the feed unit 204. The feed unit 204 feeds power to the antenna element 203.

The circuit board 205 is a board which is disposed in parallel with the display panel in the Z-axis direction and has, for example, a substantially rectangular shape. A circuit pattern and a ground pattern are formed on at least a part of the circuit board 205. A large number of electronic components (not shown) as well as the functional components 208 are connected to the circuit pattern and the ground pattern of the circuit board 205.

The strength sheet metal 206 is used to increase the strength of a display panel (not shown) of the portable wireless device 201, for example. Further, the strength sheet metal 206 may be used as a ground of the functional element 208 mounted on the antenna element 203, the L-shaped pattern portion 207, and the L-shaped pattern portion 207. The strength sheet metal 206 is connected to the ground pattern of the circuit board 205 at connection points 210a to 10e provided near, for example, the four corners of the circuit board 205 and one end of the L-shaped pattern portion 207. This strengthens the ground.

The L-shaped pattern portion 207 is formed on the circuit board 205 and is substantially L-shaped. The L-shaped pattern portion 207 is formed in a substantially L-shaped elongated strip shape from the right side to the lower side of the circuit board 205. One side of the L-shaped pattern portion 207 is partitioned by the right side of the circuit board 205, and the other side is partitioned by a pattern removal area 209 formed on the circuit board 205. One end of the L-shaped pattern portion 207 is connected to the ground pattern of the circuit board 205, and the other end is disposed in close proximity to the open end 211 of the antenna element 203.

The L-shaped pattern portion 207 is connected to the strength sheet metal 206 by a connection point 210e near one end. In addition, the functional component 208 is mounted on the other end of the L-shaped pattern portion 207 along the lower side (the X-axis direction) of the circuit board 205. The L-shaped pattern portion 207 and the functional component 208 are electrically connected.

The open end 211 of the antenna element 203 and the functional component 208 mounted on the L-shaped pattern portion 207 are arranged so as not to overlap in the lower side X-axis direction of the circuit board 205. In addition, the functional component 208 is disposed in close proximity to the open end 211 of the antenna element 203. The distance between the open end 211 of the antenna element 203 and the functional component 208 mounted on the L-shaped pattern portion 207 is, for example, 0.003λ with respect to the wavelength λ corresponding to the communication frequency of the antenna element 203.

The length L2 of the L-shaped pattern portion 207 is the tip of the L-shaped pattern portion 207 facing close to the antenna element 203 from the connection point 210e of the L-shaped pattern portion 207 and the strength sheet metal 206 (or the functional part 208 Length to the tip). For example, the length L2 is set to approximately λ / 4 of the wavelength λ corresponding to the communication frequency of the antenna element 203. As a result, the L-shaped pattern portion 207 and the functional component 208 resonate at the communication frequency used by the antenna element 203 and function as a ground wire. Therefore, the current flowing to the antenna element 203 can be dispersed to the current flowing to the ground line, and the degradation of the antenna performance when the human body approaches can be suppressed.

In the L-shaped pattern portion 207, functional components 208 (for example, a vibrator 208a and a microphone 208b) which are an example of the electronic components are mounted. The functional component 208 is provided along the outer peripheral portion of the circuit board 205 by the L-shaped pattern portion 207. The functional component 208 is located on the opposite side of the antenna element 203 from the feeding part 204, that is, on the lower side of the circuit board 205 at the lower right end in FIG. Along with it, it is disposed apart from the open end 211 of the antenna element 203.

FIG. 23 (c) shows a cross-sectional view of the L-shaped pattern portion 207. In the L-shaped pattern portion 207, a plurality of (for example, four hierarchical layers) functional component circuit patterns 214 are formed so as to be sandwiched by the base material 213. The signal wiring of the functional component 208 mounted on the L-shaped pattern portion 207 is electrically connected to the functional component circuit pattern 214 disposed in the inner layer of the L-shaped pattern portion 207 via, for example, a through hole.

Moreover, it is preferable that the upper and lower surfaces (in the Z-axis direction) of the L-shaped pattern portion 207 be shielded by being covered by the ground pattern 215. Thus, the ground pattern 215 can be used as part of the ground line. Therefore, the electrical surface area of the L-shaped pattern portion 207 can be increased, the loss resistance of the ground wire can be reduced, and the performance of the antenna element 203 can be improved.

In addition, when the functional component circuit pattern 214 is covered with the ground pattern 215, high frequency noise introduced from the functional component 208 to the antenna element 203 can be reduced to improve the performance of the antenna element 203. Similarly, high frequency noise introduced from the antenna element 203 to the functional component 208 can be reduced to improve the performance of the functional component 208. For example, noise in the voice band input by the microphone 208 b can be reduced.

Also, the functional component 208 often does not emit a strong signal as noise, but when the portable wireless device 201 is miniaturized, the signal of another electronic component (for example, CPU) on the circuit board 205 is the functional component circuit pattern 214 May be transmitted to the antenna element 203. By covering the functional component circuit pattern 214 with the ground pattern 215, such transmission can be avoided.

FIGS. 24A and 24B are image diagrams showing a state in which the portable wireless device 201 is held by the left hand. FIG. 24A shows the back side of the portable wireless device 201. A broken line 221 indicates a current component flowing in a path including the antenna element 203. A broken line 222 indicates a current component flowing in a path including the L-shaped pattern portion 207 operating as a ground line and the functional component 208. A broken line 223 indicates a current component flowing through a path in the thickness direction (Z-axis direction) of the functional component 208. The L-shaped pattern portion 207 mounting the functional component 208 is disposed on the thumb 225 side of the left hand, and the antenna element 203 is disposed on the opposite side in the X-axis direction.

By causing the functional component 208 and the L-shaped pattern portion 207 to function as a ground line, as shown in FIG. 24A, the antenna flows in the short side direction (X-axis direction) of the hand that is not easily affected by the human body. It can distribute the current. That is, the current flowing through the ground wire and the current flowing through the antenna element 203 can be dispersed. Therefore, since the functional component 208 disposed at the lower end of the portable wireless device 201 is not covered by the hand holding the portable wireless device 201, it is possible to reduce the amount of absorption of current flowing through the antenna by the human body (for example, the gripping hand). .

Further, as shown in FIG. 24B, when the portable wireless device 201 is gripped by hand, the Z-axis direction is not easily covered by the hand, so the thickness of the functional component 208 (the length in the Z-axis direction) It is possible to obtain a current component in the Z-axis direction that is unlikely to be affected. Therefore, it is possible to reduce the amount of absorption of the current flowing through the antenna by the human body (for example, the hand holding it).

Furthermore, the thickness of the functional component 208 or the thickness of the functional component 208 and the L-shaped pattern portion 207 makes it possible to obtain the current component of the ground wire in the Z-axis direction orthogonal to the human body, thereby deteriorating the antenna performance at the time of human proximity. Can be suppressed. This thickness is, for example, 0.015 λ with respect to the wavelength λ corresponding to the communication frequency of the antenna element 203.

In addition, since the strength sheet metal 206 is spaced apart at a position not overlapping the functional component 208 in the long side direction (Y-axis direction) of the housing 202, a radio wave of a ground wire having the functional component 208 as a component Radiation efficiency can be improved.

In the portable wireless device 201 of FIG. 23A, the respective components including the antenna element 203 may be disposed on the opposite side in the left-right direction (X-axis direction).

Thus, the portable wireless device 201 includes the housing 202, the antenna unit, the power feeding unit 204, the circuit board 205, the pattern unit, and the electronic component. The antenna unit is disposed on one end side (for example, the lower end side) of the housing 202 in the first direction (for example, the Y-axis direction). The feeding unit 204 is disposed at one end side (for example, the left end side) in a second direction (for example, the X-axis direction) orthogonal to the first direction at one end side in the first direction of the housing 202 and feeds power to the antenna unit. The circuit board 205 is formed with a ground pattern, and the ground of the power supply unit 204 is connected to the ground pattern. The pattern portion is formed on the circuit board 205 so as to extend from one end side in the first direction of the housing 202 to the other end side (for example, the right end side) in the second direction. The electronic component is mounted facing the open end of the antenna unit in the pattern unit. The antenna portion and the pattern portion or the electronic component are electrically isolated. The antenna unit is, for example, an antenna element 203. The pattern portion is, for example, an L-shaped pattern portion 207. The electronic component is, for example, a functional component 208. The electrical length of the path formed by the pattern portion and the electronic component is set to, for example, approximately λ / 4 with respect to the wavelength λ corresponding to the communication frequency of the antenna portion.

According to the portable wireless device 201, the pattern portion on which the electronic component is mounted can be resonated at the communication frequency of the antenna element 203, and can function as a ground wire. Thereby, current components in the width direction and the thickness direction of the housing can be obtained. Moreover, the absorption rate of the antenna current by the human body at the time of holding can be reduced, deterioration of the antenna performance can be suppressed, and good communication can be performed.

In addition, although the functional component and its circuit pattern usually have low impedance in high frequency, the pattern unit resonates at the communication frequency of the antenna unit and has high impedance at the communication frequency of the antenna unit. Therefore, the antenna portion and the electronic component can be disposed close to each other without degrading the antenna performance.

In the portable wireless device 201, the surface of the pattern portion may be covered by a ground pattern. Thereby, the electrical surface area of the L-shaped pattern portion can be increased, the loss resistance of the ground wire can be reduced, and the antenna performance can be improved.

In addition, in the portable wireless device 201, the signal wiring of the electronic component may be connected to a signal wiring pattern in which a plurality of signal wiring patterns are stacked in the pattern portion. The signal wiring pattern is, for example, a functional component circuit pattern 214. As a result, the current component in the thickness direction of the portable wireless device 201 is increased, and the electrical influence due to the proximity of the human body can be reduced.

In addition, in the portable wireless device 201, the pattern portion may be partitioned by the pattern removal area 209 from which the conductor pattern provided on the circuit board 205 is removed. Thus, the influence of noise on the pattern portion can be blocked by one circuit board 205, and the performance deterioration of the antenna portion and the electronic component can be suppressed.

Fourth Embodiment
25 (a) and 25 (b) schematically show the internal structure of the portable wireless device 201B. FIG. 25A is a rear view of the portable wireless device 201B. FIG. 25 (b) is a cross-sectional view taken along the line BB in FIG. 25 (a).

In the portable wireless device 201B of FIGS. 25 (a) and 25 (b), the same or similar parts as or to those of the portable wireless device 201 shown in FIGS. 23 (a) to 23 (c) are denoted by the same reference numerals. The operation and effect of the parts having the same reference numerals are the same as those of the parts of the portable wireless device 201, and thus the detailed description will be omitted.

The portable wireless device 201B is shown in FIGS. 23 (a) to 23 (c) in that it includes an adjustment circuit 231 for adjusting the impedance of the ground wire formed by the L-shaped pattern portion 207 and the functional component 208. This differs from the portable wireless device 201.

The adjustment circuit 231 is, for example, a lumped constant circuit including an LC circuit. As shown in FIG. 25 (b), the adjustment circuit 231 is connected between the ground pattern 215 of the L-shaped pattern portion 207 and the ground pattern 235 on the opposite side via the pattern removal area 209 of the circuit board 205. Ru. The adjustment circuit 231 adjusts the frequency of the signal transmitted on the L-shaped pattern portion 207 and the functional component 208 to a predetermined resonant frequency (the communication frequency of the antenna element 203). The adjustment circuit 231 is connected to the ground pattern 215 of a portion (a Y-axis direction portion) formed along the side of the circuit board 205 in the L-shaped pattern portion 207.

As shown in FIG. 25A, the L-shaped pattern portion 207 has an L1 portion and an L2 portion. The L1 portion is a portion from the adjustment circuit 231 to the connection point 210e connected to the strength sheet metal 206. The L2 portion is a portion from the tip of the L-shaped pattern portion 207 on which the functional component 208 is mounted to the adjustment circuit 231. The position of the connection point 210e is determined in consideration of the value of the impedance generated by the L1 portion. The constant of the adjustment circuit 231 is such that the electrical length of the path formed by the L1 portion, the L2 portion, and the adjustment circuit 231 is, for example, approximately λ / 4 with respect to the wavelength λ corresponding to the communication frequency of the antenna element 203. Set to

In the present embodiment, the L2 portion resonates at the communication frequency of the antenna element 203 and functions as a ground wire. In this case, the L1 portion has a component of the termination impedance of the L2 portion. The L2 portion apart from the ground pattern 215 of the circuit board 205 contributes to the radiation of the ground wave radio wave. The ground line is tuned to the communication frequency of the antenna element 203 by combining the impedance of the adjustment circuit 231 and the L1 portion.

Moreover, in order to facilitate adjustment of the resonance frequency by the adjustment circuit 231, the L1 portion is preferably formed as long as possible. When the L1 portion is formed long, that is, when the impedance of the L1 portion is large, the component of the impedance of the adjustment circuit 231 among the termination impedance becomes dominant, and the adjustment of the resonance frequency becomes easy. However, in order to prevent the deterioration of the antenna characteristics (the characteristics of the ground line) caused by the resonance of the L1 portion, the length of the L1 portion that resonates at the resonance frequency corresponding to the communication frequency of the antenna element 203 (n × λ / 4: It is desirable to set by avoiding n).

Further, the adjustment circuit 231 is provided on the side on which the circuit board 205 opposite to the side on which the strength sheet metal 206 is disposed (the front side in FIG. 25A) is disposed (the back side in FIG. 25A). Is preferred. Thereby, an adverse effect due to electromagnetic coupling between the adjustment circuit 231 and the strength sheet metal 206 can be prevented.

Further, the arrangement position of the adjustment circuit 231 may not be the position illustrated in FIG. For example, the position moved upward in the Y-axis direction is the arrangement position of the adjustment circuit 231, the length of the L1 portion is shorter than that of FIG. 25A, and the length of the L2 portion is longer than that of FIG. May be Thereby, the distance between the ground line formed by the L2 portion and the ground can be satisfactorily secured.

FIG. 26 shows an equivalent circuit of the L-shaped pattern portion 207. As shown in FIG. In FIG. 26, the impedance of the adjustment circuit 231 and the impedance 232 of the L1 portion are connected in parallel between the L2 portion as a ground wire constituted by the L-shaped pattern portion 207 and the functional component 208 and the strength sheet metal 206. Ru.

FIGS. 27 (a) to 27 (d) show specific examples of the adjustment circuit 231. FIG.
FIG. 27A shows an adjustment circuit 231a configured by a circuit (for example, an inductor) having one lumped constant. The resonance frequency of the L2 portion is adjusted around the resonance frequency corresponding to the communication frequency of the antenna element 203 by the inductor as the adjustment circuit 231a. The inductance is set to, for example, 22 nH as one lumped constant.

FIG. 27 (b) shows the adjustment circuit 231 b configured by a resonant circuit (for example, an LC parallel resonant circuit). As shown in the frequency-reactance characteristic of FIG. 27C, when the communication frequency of the antenna element 203 is low, the L component of the adjustment circuit 231b is used, and when the operating frequency of the antenna element 203 is high, the C component is Adjust the resonant frequency of the L2 part. As a result, the L2 portion can be resonated at two frequencies, and the ground wire can support communication in a plurality of frequency bands.

FIG. 27 (d) shows an adjustment circuit 231c constituted by a circuit (for example, an inductor and a capacitor) having a high frequency switch 233 (for example, a 1-input 2-output switch) and two lumped constants. The adjustment circuit 231 c switches the connection destination on the output side of the high frequency switch 233 to the inductor L or the capacitor C according to the communication frequency of the antenna element 203 by the high frequency switch 233. As a result, the L2 portion can be resonated at two frequencies, and the ground wire can support communication in a plurality of frequency bands.

Thus, the portable wireless device 201B includes the adjustment circuit 231 for adjusting the frequency of the signal transmitted on the pattern portion and the electronic component to a predetermined resonant frequency. The adjustment circuit 231 is connected between the ground pattern of the pattern portion and the region of the ground pattern of the circuit board 205 electrically separated from the pattern portion.

According to the portable wireless device 201B, by arbitrarily setting the constant of the adjustment circuit 231, the ground wire including the pattern portion and the electronic component can be easily resonated at a desired antenna frequency, and the antenna performance can be improved. .

Fifth Embodiment
FIGS. 28A and 28B schematically show the internal structure of the portable wireless device 201C. FIG. 23A is a rear view of the portable wireless device 201C. FIG. 28 (b) is a cross-sectional view taken along the line CC in FIG. 28 (a).

In the portable wireless device 201C of FIGS. 28 (a) and 28 (b), the same or similar parts as the portable wireless device 201 shown in FIG. 23 and the portable wireless device 201B shown in FIG. Attached. The operation and effect of the parts with the same reference numerals are the same as those of the parts of the portable wireless devices 201 and 201B, and thus detailed description will be omitted.

The mobile wireless device 201C is different from the mobile wireless device 201B of FIGS. 25A and 25B in that the L-shaped pattern portion 207 is formed as an individual circuit board.

The portable wireless device 201C includes a plurality of circuit boards as circuit boards, and includes a first circuit board 205a and a second circuit board 205b. The first circuit board 205 a is intended to miniaturize the circuit board 205 shown in FIG. The second circuit board 205b is a board having an L-shaped pattern portion 207, and is provided as a board different from the first circuit board 205a. The second circuit board 205 b is electrically connected to the first circuit board 205 a via the board connection connector 241. The board connection connector 241 is formed of, for example, a flexible board.

The adjustment circuit 231 is mounted on the L-shaped pattern unit 207. As shown in FIG. 28B, the adjustment circuit 231 is connected to the strength sheet metal 206 via the through hole 242 in the second circuit board 205b and the connection point 210g.

The feed part 204 of the antenna element 203 is provided on the second circuit board 205b extending to the lower left end of the housing 202 along the X-axis direction in FIG. It is electrically connected to the one circuit board 205a. Further, the ground in the vicinity of the feeding part 204 of the second circuit board 205b is electrically connected to the strength sheet metal 206 by the connection point 210f. In addition, a pattern removal area 209 is provided between the power supply unit 204 side and the mounting unit side of the functional component 208 in the second circuit board 205b, and the power supply unit 204 and the mounting unit side of the functional component 208 are electrically Isolated to

Note that the second circuit board 205 b is mounted with, for example, the power supply unit 204 and the functional component 208, and thus is not specially provided as a dedicated parasitic element. By providing the second circuit board 205b, the portable wireless device 201C can be miniaturized.

Thus, the circuit board of the portable wireless device 201C includes the first circuit board 205a and the second circuit board 205b electrically connected to the first circuit board 205a. The ground pattern of the first circuit board 205 a is electrically connected to the ground of the power supply unit 204. A pattern portion is formed on the second circuit board 205b.

According to the portable wireless device 201C, the first circuit board 205a can be miniaturized, and the degree of freedom in the layout of components in the housing 202 is improved.

Sixth Embodiment
29 (a) to 29 (c) schematically show the internal structure of the portable wireless device 201D. FIG. 29A is a rear view of the portable wireless device 201D. FIG. 29 (b) is a cross-sectional view taken along the line DD in FIG. 29 (a). FIG. 29 (c) is a cross-sectional view taken along the line EE of FIG. 29 (a).

In the portable wireless device 201D shown in FIGS. 29 (a) to 29 (c), the portable wireless device 201 shown in FIGS. 23 (a) to 23 (c) and the portable wireless device shown in FIGS. 25 (a) and 25 (b). The parts identical or similar to those of the portable wireless device 201C shown in FIG. 25A and FIGS. 25 (a) and 25 (b) are assigned the same reference numerals. The operation and effect of the parts with the same reference numerals are the same as those of the parts of the portable wireless devices 201, 201B, 201C, and thus the detailed description will be omitted.

The portable wireless device 201D is configured as shown in FIGS. 28A and 28B in that a part of the second circuit board 205c on which the L-shaped pattern portion 207 is formed is disposed along the thickness direction of the housing 202. This is different from the portable wireless device 201C.

In the portable wireless device 201D, the second circuit board 205c is formed of a foldable base (for example, a flexible board). One end of the second circuit board 205 c on which the L-shaped pattern portion 207 is formed is connected to the first circuit board 205 a by the board connection connector 241. In FIG. 29A, the portion of the second circuit board 205c along the Y-axis direction is bent in the Z-axis direction so that the L-shaped pattern portion 207 approaches the strength sheet metal 206 on the right side of the first circuit board 205a. And arranged along the right side (the Y-axis direction) of the first circuit board 205a.

Further, in FIG. 29A, the second circuit board 205c is bent in the X axis direction at the lower right end portion of the housing 202, and the mounting portion of the functional component 208 of the L-shaped pattern portion 207 is along the X axis direction. Will be placed. That is, the surface of the L-shaped pattern portion 207 is disposed to face the right side surface (YZ plane) and the lower surface (XZ plane) of the housing 202 in FIG. The functional component 208 is mounted on the mounting surface along the XZ plane of the L-shaped pattern portion 207.

As shown in FIG. 29B, on the right side of the first circuit board 205a, an L-shaped pattern portion 207 surrounded by a broken line is disposed along the Z-axis direction orthogonal to the human body. Further, as shown in FIG. 29C, at the lower end portion of the housing 202, an L-shaped pattern portion 207 surrounded by a broken line is disposed along the Z-axis direction orthogonal to the human body.

Further, the area of the second circuit board 205b to which the pattern removal area 209 and the feeding portion 204 are connected may not be bent in the Z-axis direction.

When the adjustment circuit 231 is provided, a portion (corresponding to L2 portion) from the adjustment circuit 231 to the mounting portion of the functional component 208 in the second circuit board 205c is bent in the Z-axis direction, and from the adjustment circuit 231 The portion (corresponding to the L1 portion) up to the board connection connector 241 may not be bent in the Z-axis direction. Thereby, adjustment of the resonance frequency by the adjustment circuit 231 becomes easier.

On the other hand, when the adjustment circuit 231 is not provided, the portion from the connection point 210e of the second circuit board 205c and the strength sheet metal 206 to the mounting portion of the functional component 208 is bent in the Z axis direction. The portion up to the substrate connection connector 241 may not be bent in the Z-axis direction. That is, if a portion functioning as a ground line is bent, desired characteristics can be obtained.

The length in the Z-axis direction of the bent portion of the second circuit board 205c may be, for example, 3 mm to 5 mm as long as the functional component 208 can be mounted.

According to the portable wireless device 201D, the L-shaped pattern portion 207 functioning as a ground wire is disposed to face the side surface (YZ plane) and the lower surface (XZ plane) of the housing 202. As a result, for example, when gripping the portable wireless device 201D, it is possible to obtain more antenna current components of the Z axis orthogonal to the human body, and it is possible to further suppress the deterioration of antenna performance when the human body approaches. Further, since there are generally few components arranged orthogonal to the XY plane of the housing 202, the functional component 208 should be mounted in the direction (Y-axis direction) orthogonal to the XZ plane of the L-shaped pattern portion 207. Thus, the space in the housing 202 can be effectively used, and the miniaturization of the portable wireless device 201D can be realized.

As described above, in the portable wireless device 201D, the second circuit board 205c is bent along the thickness direction of the housing 202. As a result, a current component in the direction orthogonal to the human body can be obtained more easily, and deterioration of the antenna performance at the time of holding the portable wireless device 201D can be further suppressed.

In the fifth and sixth embodiments, the adjustment circuit 231 is disposed as in the fourth embodiment, but the present invention is not limited to this configuration, and the third embodiment is not limited thereto. It is also possible not to include the adjustment circuit 231.

(Specific example of dimensions of each part of portable wireless device)
The main part dimensions of the portable wireless device 201C in the fifth embodiment will be exemplified below. The position in the portable radio | wireless machine 201C of a principal part dimension is shown to FIG. 30 (a), (b). FIG. 30 (a) is a view when the portable wireless device 201 is viewed from the back side, and FIG. 30 (b) is a side view thereof. In the 900 MHz band in which the L-shaped pattern portion 207 resonates, each value is set as follows.

(1) L1 (length of L1 part) = 0.09 λ
(2) L2 (length of L2 part) = 0.08 λ
(3) Tip thickness (length in the Z-axis direction) of the L-shaped pattern portion 207 (functional component + circuit board) = 0.015 λ
(4) X-axis direction length of L-shaped pattern portion 207 = 0.04 λ
(5) Length in the X-axis direction of the antenna element 203 = 0.11 λ
(6) Length from the L-shaped pattern portion 207 to the right end of the housing 202 (the end portion on the L-shaped pattern portion 207 side in the X-axis direction) = 0.01λ
(7) Length from the feeding unit 204 to the left end of the housing 202 (the end on the feeding unit 204 side in the X-axis direction) = 0.02λ
(8) Length from the tip of the L-shaped pattern portion 207 to the open end of the antenna element 203 = 0.003λ
(9) Case length (the length in the Y-axis direction of the case 202) = 0.38λ
(10) Case width (the length in the X axis direction of the case 202) = 0.19λ
(11) Case thickness (the length in the Z axis direction of the case 202) = 0.03λ,

As mentioned above, the length of L2 part is 0.08 (lambda). This length is less than λ / 4 (0.25λ). However, due to the wavelength shortening effect of the combined reactance of the adjustment circuit 231 (for example, 22 nH) and the L1 part and the dielectric (for example, the housing 202), the L2 part has an electrical length of about 0.25λ. And resonate. By forming the length (4) in the X-axis direction longer in the L2 portion of the L-shaped pattern portion 207, the influence of the human body can be suppressed. However, due to the restriction of the size of the housing 202, the length (4) in the X-axis direction of the L2 part is in a trade-off relationship with the antenna element length (5). Can be set to

For example, when the portable wireless device 201C has the antenna element 203 operable in three communication frequency bands of, for example, 900 MHz band, 1.7 GHz band, and 2 GHz band, the L-shape can be obtained by setting to the dimensions illustrated above. The pattern portion 207 can be resonated in the 900 MHz band.

FIG. 31 (a) shows a frequency-VSWR (Voltage Standing Wave Ratio) characteristic of a conventional portable wireless device. FIG. 31 (b) shows the frequency-VSWR characteristics of the portable wireless device 201C set to the above values. The 900 MHz band is, for example, 880 MHz to 960 MHz. The 1.7 GHz band is, for example, 1.71 GHz to 1.88 GHz. The 2 GHz band is, for example, 1.92 GHz to 2.17 GHz.

31 (a) and FIG. 31 (b), it is understood that resonance occurs between the L-shaped pattern portion 207 and the functional component 208 in the vicinity of 850 GHz (frequency f1 in FIG. 31 (b)). it can. The allowable range of deviation of the antenna element 203 from the communication frequency band for obtaining good characteristics is, for example, about ± 15% of the bandwidth of the communication frequency band, so that around 850 GHz is included in this range. Therefore, according to the portable wireless device 201C, the human body influence can be reduced in the 900 MHz band.

Although the case of the portable wireless device 201C is illustrated here, the values (for example, dimensions, communication frequency) are not particularly shown in the respective embodiments for the portable wireless devices 201, 201B, and 201D. When each value is applicable, it is applicable similarly.

(The process of obtaining another form of the present invention)
An example of a portable wireless device is described in the above-mentioned Patent Document 1. The portable wireless device described in Patent Document 1 is disposed at the upper end portion of the housing, at least one place of one end is connected to the signal wiring pattern on the device substrate, and the other end is an open end An antenna element on the same side as the antenna element of the housing, at least one location of one end connected to the ground wiring of the device substrate, and a parasitic element whose other end is an open end; The distance between the feed element and the open end is made close and capacitively coupled.

By the way, as for the arrangement position of the antenna element in a portable radio | wireless machine, the lower end side of a housing | casing is generally preferable from a viewpoint of SAR (Specific absorption rate, Specific Absorption Rate). However, when the antenna element is disposed on the lower end side of the housing, the antenna element is covered with a hand during a call, which causes a problem that the gain of the antenna is deteriorated. FIG. 44 is an image view showing a state in which the portable wireless device 1200 is held by the hand (left hand) 1100. As shown in the figure, since the antenna element 1201 is disposed at the lower end portion of the casing of the portable wireless device 1200, the antenna element 1201 is covered with the hand 1100 when the portable wireless device 1200 is held by hand. It will As described above, when the antenna element is disposed at the lower end portion of the casing of the portable wireless device, the antenna performance is deteriorated during a call in the hand-held state, and good communication can not be performed.

Hereinafter, a portable wireless device capable of performing good communication with little degradation of the antenna performance at the time of holding the hand, even when the antenna element is disposed at the lower end portion of the housing, will be described.

Seventh Embodiment
FIG. 32 is a rear view showing the internal structure of a mobile wireless device according to the seventh embodiment of the present invention. In the figure, a portable wireless device 301 according to the present embodiment includes a housing 302, an antenna element 303 provided at the lower end of the housing 302, a feeding portion 304 for feeding the antenna element 303, and a ground pattern (shown And the ground of the feeding portion 304 is provided at the lower end portion of the circuit board 305 electrically connected to the ground pattern and at the lower end portion of the housing 302 and electrically connected to the ground pattern of the circuit board 305. And the ground line 306.

The antenna element 303 is formed in a rectangular plate shape, and is disposed apart from the circuit board 305. The ground wire 306 includes a body portion 361 formed in a rod-like L-shape and a rectangular plate-like base end portion 362 formed on one end side of the body portion 361, and the base end portion 362 is a connection portion 307. Are connected to the ground pattern of the circuit board 305. A connection portion 307 for connecting the ground wire 306 to the circuit board 305 is disposed separately in the width direction of the feed portion 304 for feeding the antenna element 303 and the housing 302. The end portion (portion parallel to the short direction of the circuit board 305) 361a of the main body portion 361 of the ground wire 306 is located at the lower end portion of the housing 302, and the end thereof is an open end. The open end is facing away from it. FIG. 33 is a cross-sectional view taken along the line AA 'showing the base end portion 362 of the ground wire 306 and the connection portion 307 of the circuit board 305, wherein the left side is the back and the right side is the front. . As shown in the figure, a ground wire 306 is provided on the back side of the circuit board 305. FIG. 34 is an image diagram showing a state in which the portable wireless device 301 according to the present embodiment is held by the left hand. As shown to the same figure, the ground wire 306 is located in the thumb side of the left hand 50, and the antenna element 303 is located in the other side. Further, the shape of the antenna element 303 is appropriately optimized depending on the structure of the antenna element and the like, and the shape is not limited to this shape.

The portable wireless device 301 according to the present embodiment is provided with a ground wire 306 having a contact point with the ground pattern of the circuit board 305 on the opposite side of the feeding portion 304 with respect to the antenna element 303 provided at the lower end portion of the housing 302. Thus, the antenna current flowing to the antenna element 303 also flows to the ground wire 306. That is, the ground wire 306 can function as an antenna. When only the antenna element 303 is in proximity to the human body, the current flowing through the antenna element 303 decreases and performance is degraded. The addition of the ground wire 306 reduces the performance degradation due to the current flowing through the ground wire 306 when the human body is in proximity. By distributing the current to the ground wire 306, the performance is improved in a call state in which the portable wireless device 301 is held by the left hand. Moreover, since the tip portion 361a of the ground wire 306 is positioned at the lower end portion of the housing 302 in the portable wireless device 301 according to the present embodiment, only the housing 302 obstructs the lower direction ( Radio waves are emitted downward from the lower end of the housing 302 (as it is not blocked by the hand).

As described above, the portable wireless device 301 according to the present embodiment includes the housing 302, the antenna element 303 provided at the lower end of the housing 302, the feeding portion 304 for feeding the antenna element 303, and the ground pattern. And a ground wire 306 electrically connected to the ground pattern, and a ground wire 306 provided at the lower end of the housing 302 and electrically connected to the ground pattern of the circuit substrate 305; , And the connection portion 307 between the feed portion 304 and the ground pattern of the ground wire 306 is disposed apart in the width direction of the housing 302, and the open end of the antenna element 303 and the open end of the ground wire 306 are opposed to each other. Therefore, even if the antenna element 303 is disposed at the lower end portion of the housing 302, the antenna performance deterioration at the time of holding the hand is small, and good communication can be performed.

Eighth Embodiment
FIG. 35 is a rear view showing the internal structure of a portable wireless apparatus according to the eighth embodiment of the present invention. In the figure, parts common to those of the portable wireless device 301 according to the seventh embodiment shown in FIG. 32 are assigned the same reference numerals. The portable wireless device 310 according to the present embodiment includes the insert sheet metal 311 electrically connected to the ground pattern (not shown) of the circuit board 305, and the ground pattern of the circuit board 305 via the ground wire 306 via the insert sheet metal 311. Connected to The connection between the ground pattern of the circuit board 305 and the insert metal plate 311 is made at each of the four corners of the circuit board 305. A portion indicated by reference numeral 312 is a connection point between the ground pattern of the circuit board 305 and the insert sheet metal 311.

Generally, the insert sheet metal is used to increase the strength of the display panel (for example, liquid crystal display) of the portable wireless device, and in the portable wireless device 310 according to the present embodiment, the insert sheet metal 311 is used as a display panel (not shown). In addition to strengthening, it is used as a ground for each of the antenna element 303 and the ground wire 306. However, in order to obtain a distance between the ground wire 306 and the insert sheet metal 311, a notch 311a is formed in a portion approaching the ground line 306 of the insert sheet metal 311. The part shown by a dotted line in the figure is the part before the cutout. By securing the distance between the ground wire 306 and the insert sheet metal 311, the radiation efficiency of radio waves in the ground wire 306 can be improved.

Thus, by connecting the ground wire 306 to the insert sheet metal 311, the portable wireless device 310 according to the present embodiment can achieve both reduction in antenna performance deterioration when approaching a human body and improvement in strength against display panel breakage. It becomes possible.

Ninth Embodiment
FIG. 36 is a rear view showing the internal structure of a portable wireless apparatus according to the ninth embodiment of the present invention. In the figure, the same reference numerals as in the portable wireless device 301 according to the seventh embodiment shown in FIG. 32 and the portable wireless device 310 according to the eighth embodiment shown in FIG. ing. The portable wireless device 320 according to the present embodiment includes the circuit board 321 for downsizing, thereby achieving downsizing of the device. As the circuit board 321 is miniaturized, the layout of components in the housing 302 can be liberalized.

Further, in the portable wireless device 320 according to the present embodiment, an antenna element similar to the antenna element 303 of the portable wireless device 301 according to the seventh embodiment described above (the same applies to the portable wireless device 310 according to the eighth embodiment). And an antenna substrate 323 having an antenna element and a matching circuit (both not shown). The feeding portion 304 for feeding the antenna element of the antenna substrate 323 and the circuit substrate 321 are connected by the coaxial cable 324. The ground of the antenna substrate 323 is electrically connected to the insert metal plate 311 by the conductive member 325. A battery 326 is disposed between the circuit board 321 and the antenna board 323 on the insert sheet metal 311. In addition, also in the portable wireless device 320 according to the present embodiment, a notch portion 311a is formed in a portion approaching the ground wire 306 of the insert sheet metal 311, and a space between the ground wire 306 and the insert sheet metal 311 is formed by the notch portion 311a. I am trying to make

As described above, in the portable wireless device 320 according to the present embodiment, the ground of the antenna substrate 323 is connected to the insert metal plate 311 by the conductive member 325, and the insert metal plate 311 is used as the ground of the antenna element of the antenna substrate 323. Performance can be improved.

Tenth Embodiment
FIG. 37 is a rear view showing the internal structure of a portable wireless apparatus according to the tenth embodiment of the present invention. In the figure, a portable wireless device 301 according to the seventh embodiment shown in FIG. 32, a portable wireless device 310 according to the eighth embodiment shown in FIG. 35 and a portable wireless device according to the ninth embodiment shown in FIG. Parts common to the respective radios 320 are assigned the same reference numerals. The portable wireless device 330 according to the present embodiment has a circuit board 321 with the same size reduction as that of the portable wireless device 320 according to the ninth embodiment, in addition to an MIC (microphone) 340 for voice input and vibration. The flexible substrate 331 on which the generated vibration 341 is mounted is provided.

The flexible substrate 331 is formed in a substantially L-shaped elongated strip, and one end is connected to the antenna substrate 323, and the other end is electrically connected with the circuit substrate 321 at the lower right corner of the circuit substrate 321. It is connected. In this case, the ground pattern of the flexible substrate 331 is connected to the ground pattern of the circuit substrate 321. Functional parts such as the MIC 340 and the vibrator 341 are mounted on a portion (referred to as the functional component mounting portion) 311 parallel to the lower end portion of the housing 302 of the flexible substrate 331. In the flexible substrate 331, high frequency signals are cut off at each signal line formed on the flexible substrate 331 (that is, each signal line for transmitting a drive signal for operating the vibration 341 and an audio signal output from the MIC 340). An inductor (not shown) is loaded. A contact 332 electrically connected to the insert sheet metal 311 is provided on a portion (referred to as a circuit board connection portion) 372 on the side of the flexible substrate 331 to be connected to the circuit substrate 321. The ground at one end of the flexible substrate 331 is connected to the ground of the antenna substrate 323, and the ground of the antenna substrate 323 is electrically connected to the insert sheet metal 311 by the conductive member 325. The feeding portion 304 for feeding the antenna element of the flexible substrate 331 and the circuit board 321 are connected by the coaxial cable 324.

The ground wire 306 is electrically connected to the ground pattern of the flexible substrate 331 and the insert metal plate 311 at the connection portion 307. FIG. 38 is a cross-sectional view taken along the line B-B 'of the circuit board connecting portion 372 of the flexible substrate 331. The left side is the back and the right side is the front. As shown in the figure, the ground wire 306 is disposed on the back side of the flexible substrate 331, and the insert sheet metal 311 is disposed on the front side of the flexible substrate 331. FIG. 39 is a side view showing a portion around the ground wire 306 of the portable wireless device 330 according to the present embodiment. As shown in the figure, an antenna substrate 323 formed in an L-shape is connected to one end of the flexible substrate 331. Also, although it is desirable that the ground line 306 be disposed orthogonal to the palm of the hand, it may be parallel to the palm of the hand. FIG. 40 is a diagram showing the distance between the signal line 373 of the flexible substrate 331 and the ground line 306. As shown in the figure, the distance between the signal line 373 of the flexible substrate 331 and the ground wire 306 is, for example, 0.004 λ or more with respect to the wavelength λ corresponding to the communication frequency, to secure the distance that the ground wire 306 becomes effective. doing. In addition, also in the portable wireless device 330 according to the present embodiment, the notch portion 311a is formed in a portion approaching the ground wire 306 of the insert sheet metal 311 so that a space between the ground wire 306 and the insert sheet metal 311 is separated. .

The experimental results of the portable wireless device 330 according to the present embodiment are as follows for the wavelength λ corresponding to the design frequency.
The dimension conditions were values shown in FIG. 41 and FIG. In this case, (a) of FIG. 42 is a perspective view showing the functional component mounting portion 371 of the flexible substrate 331 and the antenna substrate 323, and (b) of FIG. 42 is a cross-sectional view taken along line CC 'of (a) of FIG. It is. FIG. 42C is a perspective view showing a main portion 361 of the ground wire 306 and a part of the functional component mounting portion 371 of the flexible substrate 331. Further, (d) of FIG. 42 is a cross-sectional view taken along the line BB 'of the circuit board connection portion 372 of the flexible substrate 331 similar to FIG.

Length in the short direction of insert sheet metal 311: 0.192 λ
Length in the longitudinal direction of insert sheet metal 311: 0.371 λ
Distance from lower end of insert sheet metal 311 to lower end of antenna substrate 323: 0.023 λ
Length of main portion 361 of ground wire 306: 0.059 λ
The length of the tip portion 361a of the main portion 361 of the ground wire 306: 0.059λ
The distance between the lower surface of the antenna substrate 323 and the upper surface of the vibrator 341: 0.004λ
The distance between the side surface of the antenna substrate 323 and the side surface of the vibrator 341: 0.003λ
Distance between the tip of the antenna substrate 323 and the left end of the vibrator 341: 0.02λ
Distance between tip of antenna substrate 323 and right end of vibrator 341: 0.012 λ
The distance between the tip of the antenna substrate 323 and the tip of the ground wire 306: 0.024 λ
The distance between the lower surface of the MIC 340 and the tip portion 361a of the ground wire 306: 0.004λ
Width of functional component mounting portion 371 of flexible substrate 331: 0.01 λ
Distance between the circuit board connection portion 372 of the flexible substrate 331 and the main portion 361 of the ground wire 306: 0.009λ
Distance between the lower surface of the base end portion 362 of the ground wire 306 and the upper surface of the flexible substrate 331: 0.0004λ
Distance between the lower surface of the flexible substrate 331 and the upper surface of the insert sheet metal 311: 0.003λ

The amount of degradation (dB) from the free space efficiency was determined under the above dimensional conditions, and the result shown in FIG. 43 was obtained. In the figure, the two bar graphs on the left are the results when the present invention is not used (the amount of efficiency deterioration), and those drawn with a dashed line show the results when the portable wireless device 330 is held with the left hand If you do not draw anything is the result when holding the portable radio 330 with the right hand. On the other hand, the two bar graphs on the right are the results when using the present invention (the amount of efficiency degradation), and those who drew the alternate long and short dash line show the results when holding the portable wireless device 330 with the left hand. The one not drawn is the result when holding the portable radio 330 with the right hand. As can be seen from the figure, when the portable wireless device 330 is held by the left hand, it is improved by 2.1 dB by using the present invention. Even when held by the right hand, the use of the present invention is slightly improved. The difference between holding the portable wireless device 330 with the left hand and holding it with the right hand is determined by the arrangement of the antenna substrate 323 and the ground wire 306. In the portable wireless device 330, as shown in FIG. The substrate 323 is disposed on the left side in the drawing, and the ground line 306 is disposed on the right side in the drawing. That is, the feed section 304 and the antenna substrate 323 are changed from the left side to the right side of the rear view, the ground wire 306 is changed from the right side to the left side of the rear view, and the left and right of the components are reversed. Although the amount decreases, the amount of improvement when holding the right hand increases. Thus, it can be seen that antenna efficiency is improved by using the present invention.

As described above, the portable wireless device 330 according to the present embodiment has the flexible substrate 331 on which functional components such as the MIC 340 and the vibrator 341 are mounted with one end connected to the antenna substrate 323 and the other end connected to the circuit substrate 321. Since the ground wire 306 is electrically connected to the insert sheet metal 311 via the ground pattern of the flexible substrate 331 to secure the ground of the ground wire 306, the layout of functional components is improved and the antenna performance is improved. Can be achieved.

Although the flexible substrate 331 and the antenna substrate 323 are separate in the portable wireless device 330 according to the present embodiment, the antenna substrate 323 may be realized by a part of the flexible substrate 331. That is, one end of the flexible substrate 331 may function as an antenna substrate.

(Summary of one embodiment of the present invention)
An antenna device according to one aspect of the present invention includes an antenna element and three axially expanded conductive members, and a part of the antenna element and a part of the conductive member are viewed in a predetermined plane. And the surface on which the antenna element is deployed is orthogonal to a part of the conductive member.

According to the above configuration, since a part of the conductive member which is developed in three axial directions, ie, a functional component which is a conductive member having a volume, is disposed in proximity to the antenna element, the antenna element It is possible to miniaturize itself and to broaden the bandwidth. Further, by providing the conductive member, a current orthogonal to the hand flows to the conductive member, and it is possible to suppress the antenna performance deterioration in the hand holding state. In addition, conductive electronic components such as vibrators and microphones can be used as the conductive members, and in general, in a space where components around the antenna element that cause deterioration of the antenna performance are not disposed, they are positively By arranging in the vicinity, the space can be effectively used, and the present antenna device and the portable wireless device equipped with the present antenna device can be miniaturized. That is, it is possible to reduce the antenna performance deterioration in the hand holding state and to miniaturize the device body.

In the antenna device according to one aspect of the present invention, the conductive member is disposed in the vicinity of the open end of the antenna element.

Further, in the antenna device according to one aspect of the present invention, the conductive member is a functional component which is not connected to the ground or which is disconnected from the ground and the wiring in a high frequency manner.

In the antenna device according to one aspect of the present invention, a first antenna element operating in a first frequency band, and a second frequency band different from the first frequency band operate, and the first antenna element A second antenna element branched from the first conductive member, three axially expanded first conductive members, and three axially expanded second conductive members; A part of the antenna element and a part of the first conductive member overlap and are disposed close to each other in a predetermined plane view, and a part of the second antenna element and a part of the second conductive member , Are disposed close to each other in a predetermined plan view.

According to the above configuration, a portion of the first conductive member is formed using functional components which are the first and second conductive members having conductive members expanded in three axial directions, ie, volumes. Is disposed close to the first antenna element, and a part of the second conductive member is disposed close to the second antenna element, so that the antenna element itself can be miniaturized and broadened. Further, by providing the first and second conductive members, deterioration of the antenna performance can be suppressed by the current orthogonal to the hand flowing in the conductive member even in the hand holding state. Further, conductive electronic components such as a vibrator and a microphone can be used as the first and second conductive members, and by arranging them in the vicinity of the antenna element, the antenna device can be miniaturized.

In the antenna device according to one aspect of the present invention, the first conductive member is disposed in the vicinity of an open end of the first antenna element, and the second conductive member is the second antenna element. Placed near the open end of the

Further, in the antenna device of one aspect of the present invention, each of the first conductive member and the second conductive member is a functional component which is not connected to the ground or which is disconnected from the ground and the wiring in a high frequency manner. It is.

In addition, a portable wireless device according to one aspect of the present invention includes any one of the antenna devices described above.

According to the above configuration, the device body can be miniaturized, and degradation of the antenna performance can be reduced when holding the hand even when the antenna device is disposed at the lower part of the housing, and good communication can be performed. .

A mobile wireless device according to the present invention according to one aspect of the present invention includes a housing, an antenna unit disposed on one end side of the housing in the first direction, and one end side of the housing in the first direction. A feed portion disposed on one end side in a second direction orthogonal to the first direction, and a feed portion for feeding power to the antenna portion, and a circuit board in which a ground pattern is formed and the ground of the feed portion is connected to the ground pattern; In the circuit board, a pattern portion formed along one end side of the casing in the first direction to the other end side in the second direction, and the pattern portion facing the open end of the antenna portion And the electronic part mounted electrically, and the said antenna part and the said pattern part or the said electronic part are electrically isolated.

According to the above configuration, it is possible to suppress the performance deterioration due to the proximity of the human body and maintain the antenna performance and the performance of the electronic component.

The portable wireless device of the present invention according to one aspect of the present invention further includes: an adjustment circuit for adjusting the frequency of a signal transmitted on the pattern unit and the electronic component to a predetermined resonance frequency; And a ground pattern of the pattern portion and a region of the ground pattern of the circuit board electrically separated from the pattern portion.

Further, in the mobile wireless device of the present invention according to one aspect of the present invention, the surface of the pattern portion is covered with a ground pattern.

Further, in the portable wireless device of the present invention according to one aspect of the present invention, the signal wiring of the electronic component is connected to a signal wiring pattern in which a plurality of layers are stacked in the pattern portion.

Further, in the portable wireless device of the present invention according to one aspect of the present invention, the pattern portion is partitioned by a pattern removal area from which a conductor pattern provided on the circuit board is removed.

Further, in the portable wireless device of the present invention according to one aspect of the present invention, the circuit board includes a first circuit board and a second circuit board electrically connected to the first circuit board, The ground pattern of the first circuit board is electrically connected to the ground of the feeding portion, and the pattern portion is formed on the second circuit board.

Further, in the portable wireless device of the present invention according to one aspect of the present invention, the second circuit board is bent along the thickness direction of the housing.

A portable wireless device according to one aspect of the present invention includes a housing, an antenna element provided at a lower end of the housing, a feeding unit for feeding power to the antenna element, and a ground pattern, and the feeding unit A ground line electrically connected to the ground pattern, and a ground wire provided at the lower end of the housing and electrically connected to the ground pattern of the circuit board; And the connection portion between the ground wire and the ground pattern are spaced apart in the width direction of the housing, and the open end of the antenna element and the open end of the ground wire are opposed to each other. It is done.

According to the above configuration, the antenna current flows also to the ground line, and the ground line functions as an antenna, so that the antenna performance deterioration at the time of holding the hand is suppressed to a low level, and good communication is possible. That is, even if the antenna element is disposed at the lower end portion of the housing, good communication can be performed with less deterioration of the antenna performance when holding the hand.

Further, the portable wireless device according to one aspect of the present invention further includes an insert sheet metal electrically connected to the ground pattern of the circuit board, and the ground wire is electrically connected to the insert sheet metal.

According to the above configuration, it is possible to secure, as a ground for each of the antenna element and the ground wire, an insert sheet metal which enhances the strength of the display panel such as a liquid crystal display, in addition to the ground pattern of the circuit board. As a result, sufficient ground can be obtained, and antenna performance can be improved.

The portable wireless device according to one aspect of the present invention further includes an antenna substrate having the antenna element, and the ground of the antenna substrate is electrically connected to the insert sheet metal via a conductive member.

According to the above configuration, since the ground of the antenna substrate is electrically connected to the insert plate metal by the conductive member, the ground of the antenna substrate can be secured, and antenna performance can be improved.

Further, the portable wireless device according to one aspect of the present invention further includes a flexible substrate electrically connected to the ground pattern of the circuit substrate, one end of which functions as the antenna substrate, and the ground wire is the flexible substrate. It is electrically connected to the said insert sheet metal through a ground pattern.

According to the above configuration, since the ground wire is electrically connected to the insert sheet metal by the ground pattern of the flexible substrate, the ground of the ground wire can be secured, and antenna performance can be improved.

In addition, the mobile wireless device according to one aspect of the present invention further includes a functional component mounted on the flexible substrate.

According to the above configuration, since the functional component such as the microphone and the vibrator is mounted by the flexible substrate, the layout of the functional component can be liberalized.

Although the present invention has been described in detail and with reference to specific embodiments, various changes and modifications that can be easily conceived and practiced by those skilled in the art without departing from the spirit and scope of the present invention are described. It is clear that it is possible to add.
The present application relates to Japanese Patent Application No. 2012-144486 filed on June 27, 2012, Japanese Patent Application No. 2012-196652 filed on September 6, 2012, and Japanese Patent Application filed on December 4, 2012. No. 2012-265347, the contents of which are incorporated herein by reference.

The present invention can particularly improve antenna performance when approaching a human body, and can be applied to a portable wireless device such as a cellular phone or a smartphone.

1, 30 portable wireless device 1A simulation analysis model 2 housing 3 circuit board 3A first circuit board 3B second circuit board 4, 4A, 4B antenna element 5 feeding portion 6 conductive member 7, 37 antenna device 8, 40 Metal shield 9 LCD reinforcement sheet metal 10 battery 11 contacts 20 left hand phantom 21 right hand phantom 22 left hand and head phantom 23 right hand and head phantom 31 vibrator 31a vibrator terminal 32 microphone 33 ground contact 34 battery terminal 35 coaxial line 38 LCD
39 LCD FPC
201, 201B, 201C, 201D Portable wireless device 202 Case 203 Antenna element 204 Feeding part 205 Circuit board 205a First circuit board 205b, 205c Second circuit board 206 Strength sheet metal 207 L-shaped pattern part 208 Functional parts 208a Vibrator 208b Microphone 209 Pattern Removal Area 210a, 210b, 210c, 210d, 210e, 210g Connection Point 211 Open End 213 Base Material 214 Functional Component Circuit Pattern 215 Ground Pattern 231, 231a, 231b, 231c Adjustment Circuit 233 High Frequency Switch 235 Ground Pattern 241 Substrate Connection connector 242 Through hole 243 Coaxial cable 301, 310, 320, 330 Portable wireless device 302 Housing 303 Antenna element 304 Feeding Part 305 Circuit board 306 Ground wire 307 Connection part 311 Insert sheet metal 311a Notch part 312 Connection point 321 Circuit board 323 Antenna board 324 Coaxial cable 325 Conductive member 326 Battery 331 Flexible board 332 Contact 340 MIC
341 vibrator 361 main body portion 361a tip portion 362 base end portion 371 functional component mounting portion 372 circuit board connection portion 373 signal line

Claims (19)

An antenna element,
And three axially deployed conductive members;
A part of the antenna element and a part of the conductive member overlap and are disposed close to each other in a predetermined plane view, and a developing surface of the antenna element is orthogonal to a part of the conductive member.
Antenna device. The antenna device according to claim 1, wherein
The conductive member is disposed near an open end of the antenna element.
Antenna device. The antenna device according to claim 1 or 2, wherein
The conductive member is a functional component that is not connected to the ground or is disconnected from the ground and the wiring in a high frequency manner.
Antenna device. A first antenna element operating in a first frequency band;
A second antenna element operating in a second frequency band different from the first frequency band and branched from the first antenna element;
Three axially deployed first electrically conductive members;
And three axially-deployed second conductive members;
A part of the first antenna element and a part of the first conductive member overlap and are disposed close to each other in a predetermined plane view,
A part of the second antenna element and a part of the second conductive member overlap and are disposed close to each other in a predetermined plane view.
Antenna device. The antenna device according to claim 4, wherein
The first conductive member is disposed near the open end of the first antenna element,
The second conductive member is disposed near an open end of the second antenna element.
Antenna device. The antenna device according to claim 4 or 5, wherein
Each of the first conductive member and the second conductive member is a functional component which is not connected to the ground or which is disconnected from the ground and the wiring in a high frequency manner.
Antenna device. The antenna apparatus according to any one of claims 1 to 6, comprising
Portable radio. And
An antenna unit disposed on one end side in the first direction of the housing;
A feed unit disposed at one end side of the casing in the first direction at one end side in a second direction orthogonal to the first direction, and configured to feed the antenna unit;
A circuit board in which a ground pattern is formed, and the ground of the power supply unit is connected to the ground pattern;
In the circuit board, a pattern portion formed along one end side in the first direction of the casing from the other end side in the second direction;
An electronic component mounted facing the open end of the antenna unit in the pattern unit;
Equipped with
A portable wireless device in which the antenna unit and the pattern unit or the electronic component are electrically isolated. A portable wireless device according to claim 8, wherein
Furthermore, the pattern unit and an adjustment circuit for adjusting the frequency of a signal transmitted on the electronic component to a predetermined resonance frequency.
The portable radio device, wherein the adjustment circuit is connected between a ground pattern of the pattern portion and a region of the ground pattern of the circuit board electrically separated from the pattern portion. A portable radio according to claim 8 or 9,
A portable wireless device in which the surface of the pattern portion is covered by a ground pattern. A portable wireless device according to any one of claims 8 to 10, wherein
The signal wiring of the said electronic component is a portable wireless device connected to the signal wiring pattern laminated in multiple numbers in the said pattern part. A portable wireless device according to any one of claims 8 to 11, wherein
The portable wireless device in which the pattern portion is divided by a pattern removal area from which a conductor pattern provided on the circuit board is removed. A portable wireless device according to any one of claims 8 to 11, wherein
The circuit board includes a first circuit board, and a second circuit board electrically connected to the first circuit board.
The ground pattern of the first circuit board is electrically connected to the ground of the power supply unit,
A portable wireless device in which the pattern portion is formed on the second circuit board. 14. A portable radio according to claim 13, wherein
A portable wireless device in which the second circuit board is bent along the thickness direction of the housing. And
An antenna element provided at the lower end of the housing;
A feeding unit for feeding the antenna element;
A circuit board having a ground pattern, wherein the ground of the power supply unit is electrically connected to the ground pattern;
A ground wire provided at a lower end portion of the housing and electrically connected to a ground pattern of the circuit board;
The feeding portion and a connection portion between the ground line and the ground pattern are spaced apart in the width direction of the housing;
The portable radio | wireless machine in which the open end of the said antenna element and the open end of the said ground wire were opposingly provided. The portable radio according to claim 15.
And an insert plate electrically connected to the ground pattern of the circuit board.
A portable wireless device in which the ground wire is electrically connected to the insert sheet metal. The portable wireless device according to claim 16, wherein
And an antenna substrate having the antenna element,
A portable wireless device in which a ground of the antenna substrate is electrically connected to the insert sheet metal through a conductive member. The portable wireless device according to claim 17, wherein
And a flexible substrate electrically connected to the ground pattern of the circuit board, one end of which functions as the antenna board,
A portable wireless device in which the ground wire is electrically connected to the insert sheet metal via a ground pattern of the flexible substrate. 19. A portable radio according to claim 18, wherein
Furthermore, a portable wireless device comprising functional components mounted on the flexible substrate.

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