CN1169209A - antenna - Google Patents

Abstract

The antenna 10 is constituted by arranging a 1 st antenna element 1 formed as a helical antenna and a 2 nd antenna element 2 formed as a whip antenna along a straight line. The antenna 10 can be rotated by a rotation axis; when the antenna is upright, any one of the antenna components is connected to a signal source 7 within the housing. For this purpose, a 1 st contact terminal 5 for connecting to a 1 st antenna component on the housing-side contact terminal and a 2 nd contact terminal 6 for a 2 nd antenna component are provided. Thus, the matching circuits 4 and 9 incorporated in the antenna 10 can be used for adjusting and matching the impedance of the antenna element of lambda/2. Thus, miniaturization is possible, and the impedance adjustment can be easily performed.

Description

antenna

The present invention relates to an antenna which can use any one of two different types of antenna elements, especially an antenna suitable for a portable radiotelephone.

It is understood that the existing antennas include: the A-type antenna shown in Fig. 12 (a) described in JP-P 3-245603, and the A-type antenna described in JP-P 6-216630. The B-type antenna shown in FIG. 12(b), and the C-type antenna shown in FIG. 12(c) described in JP-A No. 2-271701.

This A-type antenna is composed of a built-in whip antenna member 103 slidable in the housing 100 , and a helical antenna member 104 formed at the tip above the whip antenna member 103 via an insulating portion 106 . Moreover, when the A-type antenna is pulled out from the casing 100, the signal source 102 is connected to the whip antenna part 103 through the matching circuit (MC) 101, so that the whip antenna part 103 is in the working state. In addition, when the A-type antenna is put into the housing 100 , the helical antenna part 104 is still protruding from the housing 100 , and the helical antenna part 103 is in the working state through the connection between the helical antenna part 104 and the matching circuit 101 .

In addition, the insulating portion 106 is formed under the condition that the connection of the whip antenna part 103 and the helical antenna part 104 does not interfere with each other.

In addition, the B-type antenna is composed of a helical antenna part 104 accommodated in the protruding part of the case 100 and a whip antenna part 103 which can be slidably accommodated inside the case 100 . Moreover, when the B-type antenna is pulled out from the housing 100 , since the signal source 102 is connected to the whip antenna component 103 through the matching circuit (MC) 100 , the whip antenna component 103 is in a working state. In addition, when the A-type antenna is housed in the case 100, only the helical antenna part 104 is connected to the signal source 102 through the matching circuit 101, so the helical antenna part 103 is in an active state.

In addition, the insulating portion 106 is formed under the condition that the connection of the whip antenna part 103 and the helical antenna part 104 does not interfere with each other.

In addition, the C-shaped antenna is composed of a helical antenna member 104 housed in a protruding portion of the housing 100 and a whip antenna member 103 that can slide inside the housing 100 . Moreover, when the C-type antenna is pulled out from the housing 100, the whip antenna part 103 is in operation because the signal source 102 capacitively couples the whip antenna part 103 to the helical antenna part 104 through the matching circuit (MC) 101. state. In addition, if the A-type antenna is housed inside the casing 100, the capacitive coupling between the helical antenna part 104 and the whip antenna part 103 is eliminated, and only the helical antenna part 104 is in an operating state.

In addition, the insulating portion 106 is formed under the condition that the whip antenna 103 and the helical antenna 104 do not interfere with each other when they are connected.

When such existing antennas are elongated, an unnecessary helical antenna component portion remains at the top of the whip antenna component portion, and/or an insulating portion equivalent to the length of the helical antenna component, so that the overall length of the antenna becomes longer and The problem that the collection space becomes larger. In addition, when the helical antenna part is formed at the tip portion, there is a problem that the tip of the antenna becomes thicker.

Thus, in conventional antennas, there is an obstacle to miniaturization of radiotelephones equipped with antennas.

In addition, in the existing antenna, a matching circuit is used to perform impedance matching on the whip antenna part when the antenna is extended and the helical antenna part when the antenna is stored, but the length of the whip antenna part and the length of the helical antenna part vary. Combination mode, so it is not easy to adjust the impedance of the two antennas. As shown in FIG. 10, when there is a difference in impedance characteristics between the two antennas, there is a problem of SWR deterioration.

Furthermore, when manufacturing the helical antenna part, it is difficult to maintain and manage the performance from the coil winding process to the resin molding process, or there is a problem that the sliding force of the whip antenna part varies.

Therefore, it is an object of the present invention to provide an antenna which can be miniaturized, and at the same time, can perform impedance adjustment easily, and is easy to manufacture.

To achieve the above object, the antenna of the present invention is composed of a first antenna member and a second antenna member which are arranged along a straight line and have different shapes from each other. At the same time, an insertion hole provided between the first antenna member and the second antenna member is provided on the antenna. With the rotation shaft supported by the insertion hole, the first antenna member and the second antenna member can be rotated on the antenna main body, and when the antenna is rotated to a predetermined position, the antenna is erected, and the feeder is connected to the any one of the antenna components.

In addition, in order to achieve the above object, another antenna of the present invention is composed of a first antenna part and a second antenna part which are arranged along a straight line and have different shapes from each other, and at the same time, the first antenna part and the The lower end of the second antenna member is fixed by a rotating shaft to form an integral body. The first antenna part and the second antenna part are respectively located on the two surfaces of the housing by passing the rotating shaft through the housing pivot, and by placing the pivot on the housing The rotation shaft rotatably supports the integrated antenna in the housing. The feeder can be connected to the first antenna member or the second antenna member erected at a predetermined position by rotation.

In addition, in the above-mentioned two antennas of the present invention, a conversion mechanism is provided in the rotation shaft, and in this conversion mechanism, the lengths of the first antenna element and the second antenna element are different, and the feeder An electric device is rotatably connected to the antenna, and the first antenna member or the second antenna member stands up when rotated to a predetermined position.

In addition, a matching circuit may be provided at one or both of the feeding points of the first antenna member and the second antenna member.

In addition, the first antenna member and the second antenna member may be formed on a plate-shaped insulator.

In addition, the first antenna member is formed into a whip shape, and the second antenna member is formed into a helical shape.

If such an antenna of the present invention is adopted, the antenna equipped with two antenna parts can be rotated and erected when it reaches a predetermined position, and the feeder is connected to such an antenna part. Therefore, the host computer equipped with the antenna can be miniaturization.

In addition, since the matching circuit is a built-in circuit incorporated in the antenna, matching adjustment can be easily performed on each antenna component individually.

In addition, since the antenna is rotatably housed and the antenna part is formed on an insulating plate, it becomes easy to manufacture since processes such as precision machining and coil winding are not required.

Fig. 1 (a) is a schematic diagram showing the outline of the first embodiment of the antenna of the present invention, Fig. 1 (b) is a schematic diagram showing the outline of the second embodiment of the antenna of the present invention, and Fig. 1 (c) is a schematic diagram showing the antenna of the present invention Fig. 1(d) is a schematic diagram showing the outline of the fourth embodiment of the antenna of the present invention.

FIG. 2( a ) shows the state of using the first antenna member of the antenna of the present invention, and FIG. 2( b ) shows the state of using the second antenna member of the antenna of the present invention.

3( a ) is a front view showing the detailed structure of the fourth embodiment of the antenna of the present invention, and FIG. 3( b ) is a side view showing the detailed structure of the fourth embodiment of the antenna of the present invention.

4(a) is a front view showing the detailed structure of the third embodiment of the antenna of the present invention, and FIG. 4(b) is a side view showing the detailed structure of the third embodiment of the antenna of the present invention.

Fig. 5(a) is a front view showing the detailed structure of the second embodiment of the antenna of the present invention, and Fig. 5(b) is a side view showing the detailed structure of the second embodiment of the present invention.

6( a ) is a front view showing the detailed structure of the first embodiment of the antenna of the present invention, and FIG. 6( b ) is a side view showing the detailed structure of the first embodiment of the antenna of the present invention.

Fig. 7 is a diagram showing a configuration of a switching mechanism provided in a rotating shaft in the antenna of the present invention.

Fig. 8(a) is a perspective view showing a front structure of a case having a modified example of the fifth embodiment of the antenna of the present invention, and Fig. 8(b) is a perspective view showing a modified example of the fifth embodiment provided with the antenna of the present invention Oblique view of the back structure of the shell.

Fig. 9 (a) is a cross-sectional view showing the structure of a modified example of the fifth embodiment of the antenna of the present invention, and Fig. 9 (b) is a diagram showing the structure of the second antenna in the modified example of the fifth embodiment of the antenna of the present invention. 9(c) is a cross-sectional view showing the structure of the antenna case housing the first antenna in the modified example of the fifth embodiment of the antenna of the present invention.

Fig. 10 is a diagram showing impedance characteristics of the antenna of the present invention.

Fig. 11 is a diagram showing impedance characteristics of a conventional antenna.

Fig. 12(a) is a schematic structure diagram showing the A-type in the conventional antenna, Fig. 12(b) is a schematic structure diagram showing the B-type in the current antenna, and Fig. 12(c) is a schematic structure diagram showing the C-type in the conventional antenna picture.

FIG. 1 shows a schematic configuration of an antenna of the present invention. Fig. 1 (a) is a structural diagram showing the first embodiment of the antenna of the present invention, the same figure (b) is a structural diagram showing the second embodiment of the antenna of the present invention, and the same figure (c) is a diagram showing the structure of the present invention. The structural diagram of the third embodiment of the antenna, the same figure (d) is a structural diagram showing the fourth embodiment of the antenna of the present invention.

The antenna 10 of the first embodiment shown in FIG. 1(a) is a whip-shaped second antenna member and a helical first antenna member arranged along a straight line. A rotation axis 3 is provided between the first antenna element and the second antenna element. The rotating shaft 3 fits into an insertion hole formed in the antenna 10 . The rotating shaft 3 is supported in such a way that it can be rotated relative to the antenna 10 . Furthermore, the rotating shaft 3 is set in the casing of the wireless telephone not shown in the figure.

In addition, since the second antenna part 2 is made into an electrical length of about 1/2 wavelength (λ/2), the impedance of the antenna is increased, and a built-in matching circuit (MC) 9 is provided in the antenna for Adjust its impedance to match that of the case side. This matching circuit 9 is provided between the second antenna member 2 and the second contact 6 .

When the signal source 7 provided in the housing is connected to the second contact through the contact on the housing side as shown in the figure, the second antenna part is in the working state by the signal supplied by the signal source 7 . Through the rotation of the antenna 10, the first antenna component is erected, and the signal source 7 is connected to the first contact 5 through the contact on the housing side, so that the first antenna component 1 is in the working state. Then, the first contact 5 for the first antenna and the second contact 6 for the second antenna part 2 form the antenna 10 .

Furthermore, the electrical length of the first antenna member 1 is approximately λ/4.

In order to constitute the antenna structure of the first embodiment, a switching mechanism described later is provided on the rotation axis to connect the signal source to any one of the antenna components above when the antenna is rotated upright.

The antenna 10 of the second embodiment shown in FIG. 1( b ) has two whip-shaped antenna elements and a helical-shaped first antenna element arranged along a straight line. A rotation axis 3 is provided between the first antenna element and the second antenna element. The rotating shaft 3 fits into an insertion hole formed in the antenna 10 . The rotating shaft 3 is supported in such a way that it can be rotated relative to the antenna 10 . Furthermore, the rotating shaft 3 is set in the casing of the wireless telephone not shown in the figure.

In addition, since the second antenna component 2 is made with an electrical length of approximately 1/2 wavelength (λ/2), the impedance of the antenna is increased, and a built-in matching circuit (MC) 8 is provided in the antenna to adjust its impedance so that it matches that of the case side. The matching circuit 8 is arranged between the signal source and the device for contacting the housing side of the antenna 10 .

When the signal source 7 provided in the casing is connected to the matching circuit or the second contact through the contacts on the casing side as shown in the figure, the second antenna part is in the working state through the signal supplied by the signal source 7 . Through the rotation of the antenna 10, the first antenna component is lifted up, and the signal source 7 is connected to the first contact 5 through the contact on the housing side, so that the first antenna component 1 is in the working state. Then, the first contact 5 for the first antenna and the second contact 6 for the second antenna part 2 form the antenna 10 .

In this way, in the second embodiment, the total electrical length of the first antenna member 1 and the second antenna member is approximately λ/2 compared with the first embodiment.

The antenna 10 of the third embodiment shown in FIG. 1(c) is a whip-shaped second antenna member and a helical first antenna member arranged along a straight line. A rotation axis 3 is provided between the first antenna element and the second antenna element. The rotating shaft 3 fits into an insertion hole formed in the antenna 10 . The rotating shaft 3 is supported in such a way that it can be rotated relative to the antenna 10 . Furthermore, the rotating shaft 3 is set in the casing of the wireless telephone not shown in the figure.

In addition, since the first antenna part 1 and the second antenna part 2 are made to have an electrical length of approximately 1/2 wavelength (λ/2), the impedance of the antenna is increased, and a built-in matching circuit (MC )8, which is used to adjust the impedance to match that on the shell side. The matching circuit 8 is arranged between the signal source and the device for contacting the housing side of the antenna 10 .

When the signal source 7 provided in the casing is connected to the matching circuit or the second contact through the contacts on the casing side as shown in the figure, the second antenna part is in the working state through the signal supplied by the signal source 7 . Through the rotation of the antenna 10, the first antenna component is lifted up, and the signal source 7 is connected to the first contact 5 through the contact on the housing side, so that the first antenna component 1 is in the working state. Then, the first contact 5 for the first antenna and the second contact 6 for the second antenna part 2 form the antenna 10 .

The third embodiment is constituted by such a method. Compared with the above-mentioned second embodiment, only the arrangement method of the matching circuit is different.

The antenna 10 of the fourth embodiment shown in FIG. 1(d) is a whip-shaped second antenna member and a helical first antenna member arranged along a straight line. A rotation axis 3 is provided between the first antenna element and the second antenna element. The rotating shaft 3 fits into an insertion hole formed in the antenna 10 . The rotating shaft 3 is supported in such a way that it can be rotated relative to the antenna 10 . Furthermore, the rotating shaft 3 is set in the casing of the wireless telephone not shown in the figure.

In addition, since the electrical lengths of the first antenna element 1 and the second antenna element 2 are approximately 1/4 (λ/4), it is not necessary to provide a matching circuit, and impedance adjustment may be performed on the case side.

When the signal source 7 provided in the casing is connected to the matching circuit or the second contact through the contacts on the casing side as shown in the figure, the second antenna part 2 is in the working state through the signal supplied by the signal source 7 . Through the rotation of the antenna 10, the first antenna component is erected, and the signal source 7 is connected to the first contact 5 through the contact on the housing side, so that the first antenna component 1 is in the working state. Then, the first contact 5 for the first antenna and the second contact 6 for the second antenna part 2 form the antenna 10 .

Like the fourth embodiment, the electrical lengths of the first antenna element 1 and the second antenna element 2 are made approximately λ/4.

Next, FIG. 2 shows an example of the casing structure of a radiotelephone equipped with the antenna 10 according to any embodiment of the present invention.

As shown in the figure, the antenna 10 having a sheet-shaped structure is rotatably mounted on the casing 11 around the rotation axis 3, and the antenna 10 is stored upright on the mounting surface of the casing 11 on which the antenna 10 is mounted. At the same time, the concave portion 12 for enabling the rotation of the first antenna member 1 is formed.

Fig. 2 (a) shows when the 1st antenna part 1 is connected to the upright state of housing 11 side antenna 10, and the 1st antenna part 1 of antenna 10 swings outwards from housing 11, and at this moment, the 2nd antenna part 2 It is still accommodated in the concave portion 12 and does not protrude beyond the surface of the casing 11 .

When the antenna 10 is rotated, as shown in (b), the second antenna part 2 is swung out from the housing 11, and the second antenna part 2 is connected to the housing 11. At this time, the first antenna member 1 is switched to the side away from the casing 11 .

By rotating and erecting the antenna 10 in this way, switching between the first antenna element 1 and the second antenna element 2 can be performed.

Next, FIG. 3 shows the detailed structure of the fourth embodiment of the antenna of the present invention shown in FIG. 1( d ). Shown in provocation 3(a) is a front view, and picture (b) of the same figure shows a side view.

As shown in this figure, the first antenna part 1 which is a coil-shaped helical antenna and the second antenna part 2 which is a linear whip antenna are housed in a cylindrical or square antenna case 20 made of resin. Stored roughly along a straight line, the antenna 10 is formed.

In addition, the total electrical length of the first antenna element 1 and the second antenna element 2 is approximately λ/4.

The antenna 10 is mounted on one surface of the casing 11 in a manner that can be rotated by the rotating shaft 3, and the antenna box 20 is provided with a first contact 5 connected to the first antenna part 1 and a second contact 5 connected to the second antenna part 2. 2 contact 6. The first contacts 5 and the second contacts 6 are disposed at positions corresponding to the contacts 13 on one side of the housing provided in the housing 11. When the antenna 10 rotates and stands upright, it swings from the housing 11 The contacts at either end of the protruding antenna contact the contacts 13 on one side of the housing.

If, as shown in the figure, the first antenna part 1 is put out from the casing 11 and stretched out, the first contact 5 will contact the contact 13 on one side of the casing, and the first antenna part 1 will be in contact with the inside of the casing. Circuit 14 is connected. In addition, if the antenna 10 is rotated by 180° to make the second antenna part 2 swing out from the casing 11 and stand upright, the second contact 6 will contact the contact 13 on one side of the casing, and the second antenna part will 2 is just connected with the circuit 14 in the casing.

Next, FIG. 4 shows a detailed configuration of a third embodiment of the antenna of the present invention shown in FIG. 1( c ). Fig.4 (a) shows a front view, and this figure (b) shows a side view.

The antenna of the third embodiment shown in this figure is compared with the antenna of the fourth embodiment shown in FIG. /2, the following assumptions are only based on their structural differences.

Form the matching circuit 4 of the first antenna part between the first antenna part 1 of the helical antenna and the part of the rotating shaft 3 that is in contact with the ground of the housing 1, and the second antenna part of the whip antenna 2 and the portion of the rotating shaft 3 that is in contact with the ground of the casing 1 forms a second antenna component matching circuit 9, and both are accommodated in the antenna case 20 to form the antenna 10.

The antenna 10 is mounted on one side of the casing 11 in a manner capable of rotating on the rotating shaft 3. In the antenna case 20, a first contact 5 connected to the matching circuit 4 of the first antenna part and a contact part connected to the second antenna part are provided. The second contact 6 of the matching circuit 9 . The first contacts 5 and the second contacts 6 are arranged at positions corresponding to the case-side contacts 13 provided in the case 11 . When the antenna 10 is rotated and erected, the contacts 5 and 6 at one end of any one of the antenna components that are extended and erected from the casing will contact the contacts 13 at one side of the casing.

In addition, the first antenna element matching circuit 4 and the second antenna element matching circuit 9 are provided on a printed circuit board.

As shown in the figure, when the first antenna part 1 is swung out from the casing 11 and stretched upright, the first contact 5 contacts the contact 13 on one side of the casing, and the first antenna part 1 passes through the first antenna part. The matching circuit 4 is connected to the circuit 14 inside the casing. In addition, the antenna 10 is rotated by 180°, and the second antenna part 2 is swung out from the housing 11 to stand upright, the second contact 6 contacts the contact 13 on one side of the housing, and the second antenna part 2 passes through the housing 11. The second antenna element matching circuit 9 is connected to the in-casing circuit 14 .

Hereinafter, as shown in FIG. 5, it is a detailed configuration diagram of the second embodiment of the antenna of the present invention shown in FIG. 1(b). FIG. 5( a ) shows a front view, and FIG. 5( b ) shows a side view.

In the antenna of the second embodiment shown in the figure, the first antenna component 1 as a helical antenna and the second antenna 2 as a sleeve antenna are accommodated in an antenna case 20 made of resin, and constitute the antenna. 20. In addition, the rotating shaft is made into a coaxial rotating shaft 21, the outer conductor of the coaxial rotating shaft 21 is connected to the ground wire on one side of the housing, and the central conductor is connected to the matching circuit 8 arranged in the housing 11. .

Furthermore, while connecting the sleeve of the second antenna 2 as a sleeve antenna to the outer conductor of the coaxial rotating shaft 21, the center conductor of the coaxial rotating shaft 21 constitutes a switching mechanism.

7 is a detailed view of the conversion mechanism. The front end of the feeder terminal 13 at one end of the cylindrical case constituting the central conductor of the coaxial rotating shaft 21 is cut in half to form a semicircle. And, as shown in the figure, the arc-shaped first contact 5 connected to the first antenna part 1 contacts the feeding terminal 13 at one end of the semicircular housing, thereby connecting the signal source 7 in the housing 1 to the 1st antenna part 1.

This antenna 10 is mounted on the rotating shaft 3 in a manner that can be rotated on one surface of the housing. If the antenna 10 is rotated 180° to make the second antenna part 2 swing out from the housing 11 and stand upright, the arc shape The second contact 6 is in contact with the feeding terminal 13 on one side of the casing, and the second antenna component 2 is connected to the signal source 7 through the second antenna component matching circuit.

In this way, a switching mechanism is provided on the coaxial rotating shaft 21, and by rotating the antenna 10, the connection between the first antenna element 1 and the second antenna element 2 and the circuit in the casing 11 is automatically switched.

In addition, in the example shown in FIG. 5 , the matching circuit 8 is provided between the feed terminal 13 on the case side and the circuit 14 inside the case.

Next, a fifth embodiment of the antenna of the present invention is shown in FIG. 6 .

The antenna of the fifth embodiment shown in this figure is a first antenna part 1 formed in a zigzag shape on an insulating material plate 22 and a linear second antenna part 2 formed on an insulating material plate 22. It is housed in a thin, planar antenna case 20 made of resin, and constitutes an antenna.

In addition, the total electrical length of the first antenna element 1 and the second antenna element 2 is approximately λ/2, and the antenna 10 can be a thin plate-shaped flexible antenna.

The antenna 10 is attached to the rotation shaft 3 so as to be rotatable along the surface of the casing 11 . The antenna case 20 is provided with a first contact 5 connected to the first antenna member 1 and a second contact 6 connected to the second antenna member 2 . The first contacts 5 and the second contacts 6 are arranged at positions corresponding to the arc-shaped case-side contacts 13 provided in the case 11 . When the antenna 10 is rotated and erected, the contact on one side of any antenna component that swings out from the housing 11 contacts the contact 13 on one side of the housing.

In addition, a spring 15 is arranged between the contact 13 on one side of the casing and the terminal 16, and the contact 13 on the one side of the casing has potential energy stored by the action of the spring 15, so as to contact with the contact arranged in the antenna box 20. 5, 6 maintain steady contact.

When the first antenna part 1 is swinging out from the housing 11 and standing upright as shown in the figure, the first contact 5 is in contact with the contact 13 on one side of the housing, so that the first antenna part 1 is in contact with the inside of the housing. Circuit 14 is connected. In addition, if the antenna 10 is rotated 180° to make the second antenna part 2 swing out from the housing 11 and stand upright, the second contact 6 will contact the contact 13 on one side of the housing, and the second antenna part 2 Just be connected with circuit 14 in housing.

The signal from the antenna 10 is introduced into the housing 11 and supplied to the circuit 14 of the housing through the matching circuit 8 .

The following is a modified example of the fifth embodiment of the antenna of the present invention shown in FIGS. 8 and 9 .

The antenna according to the modified example of the fifth embodiment shown in the figure, as shown in FIG. on another surface. That is, the first antenna element 1 and the second antenna element 2 sandwich the casing 11 , and the first antenna element 1 and the second antenna element 2 are fixed by the rotating shaft 3 to form a whole.

In addition, on one surface on which the first antenna member 1 is provided, a fan-shaped groove is formed so that the first antenna member 1 can be rotated as shown in FIG. A groove 12 for accommodating the second antenna part 2 is provided on the surface.

At this time, as shown in FIG. 8(a), when the first antenna part 1 that is in the working state protruding upward from the casing 11 is rotated, the second antenna part 2 connected through the rotating shaft 3 is also rotated accordingly. The rotation, when rotated to the position of 180°, as shown in the figure (b), the second antenna part 2 is extended from the housing 11, and the second antenna part 2 replaces the first antenna part 1 and is in the working state .

The detailed structure of this antenna is shown in Fig. 9, and its structure is: the first antenna part 1 that forms the broken line shape on the insulating plate is accommodated in the elongated planar antenna box 20 that is made of resin; The second antenna member 2 formed in a linear shape is housed in a similarly elongated planar antenna case 20' made of resin.

In addition, the total electrical length of the first antenna member 1 and the second antenna member 2 is approximately λ/2, and the antenna 10 can be made into a thin plate-shaped flexible antenna.

This antenna 10, as shown in FIG. 8, is formed by disposing the first antenna part 1 on one surface of the housing 11, and disposing the second antenna part 2 on the other surface thereof. The first antenna part 1 and the second antenna part The antenna part 2 is fixed by the rotating shaft 3 to form a whole. The rotating shaft 3 penetrates from the front to the rear of the casing 11 , and the rotating shaft 3 is rotatably pivoted by the casing 11 .

In addition, in the antenna box 20, as shown in FIG. 9(a), the first contact 5 for connecting the first antenna component 1 is provided, and in the antenna box 20', as shown in FIG. 9, the second antenna component 2 is connected. The 2nd contact 6.

The first contact 5 is disposed at a position corresponding to the contact 13 provided on the arc-shaped housing side of the housing 11. When the antenna 10 is rotated and erected, the contact 5 of the first antenna part 1 and the The contact 13 on one side of the housing is in contact, and the second contact 6 is arranged at a position corresponding to the contact 13' on the side of the housing in the arc shape of the housing 11. When the antenna 10 rotates When erected, the contact 6 of the second antenna part 2 is in contact with the contact 13' on the case side.

In addition, the contacts 13, 13' on one side of the housing are stored with potential energy through the elongation of the springs 15, 15', so that the contacts 13, 13' on the one side of the housing are in contact with the antenna box 20, 20 , The contacts 5 and 6 maintain stable contact.

Since the antenna 10 has the structure described above, when the first antenna part 1 swings out from the housing 11 and stands upright, the first contact 5 contacts the contact 13 on one side of the housing, and the first antenna The component 1 is connected to an internal circuit 14 via a matching circuit 8 .

In addition, if the antenna 10 is rotated by 180°, the second antenna part 2 will swing out from the housing 11 and stand upright, the second contact 6 will contact the contact 13' on one side of the housing, and the second antenna part 2 will pass through the housing 11. The matching circuit 8 is connected to the circuit 14 inside the housing. At this time, the first antenna member 1 also rotates simultaneously, so that the contact between the first contact 5 and the contact 13 on the housing side is broken, and the first antenna member 1 is accommodated in the recess.

In addition, although the modified example of the fifth embodiment is used as an example to describe the antenna 10 of the modified example, the fact that the respective antenna components are arranged on both sides of the case 11 is not limited to the antenna of the fifth embodiment. It is also applicable to the first to fourth antennas.

Although the antenna 10 of the first to fifth embodiments of the present invention described above has the first antenna part 1 and the second antenna part 2, depending on the electrical length of each antenna part, separate or common The matching circuit device is inside the antenna 10 or inside the case 11, so that the impedance of each antenna component and the circuit inside the case can be adjusted and matched.

11 shows the impedance characteristics of the antenna components of the antenna 10 according to the present invention. The point indicated by  means that the SWR of each antenna component is approximately 1 in the operating frequency, which is a good antenna characteristic. However, in conventional antennas, since the impedance of each antenna element cannot be adjusted, as shown in FIG. 10 , what is indicated by  indicates that the SWR of each antenna element deteriorates under the condition of the operating frequency.

As explained above, the antenna of the present invention is not only rotatable and storeable, but also presupposes that any one of the two antenna components must be in an operating state.

In addition, the structure for connecting the feeding device on one side of the antenna 10 and the housing 11 shown in FIG. 5 (FIG. 7) and FIG. in other embodiments.

In addition, each antenna component should be able to use antenna components of various shapes in each embodiment.

In the present invention, as described above, the feeder is connected to the antenna having two antenna parts so that it can be rotated and erected at a predetermined position. Therefore, it is not necessary to provide an insulating part in the antenna. Therefore, it is possible to miniaturize a main unit equipped with such an antenna. Therefore, it is suitable for portable devices, especially suitable for use in portable cordless phones.

In addition, since the matching circuit can also be embedded in the antenna, not only can each antenna component be formed on an insulator, but also the characteristics of each antenna component can be made to be excellent.

In addition, the antenna can be stored by being rotated, and a plate-shaped flexible antenna can be obtained by forming the antenna member on an insulator. At the same time, it can also be miniaturized. In addition, since processes such as finishing and coil winding are unnecessary, manufacturing can be facilitated.

Claims (10)

1. An antenna, characterized in that: this antenna is equipped with a first antenna part and a second antenna part which are arranged along a straight line and are made into different shapes; and the first antenna part and the second antenna part are provided with Insertion hole: The above-mentioned first antenna component and second antenna component are rotatably supported on the housing through the rotation shaft pivoted by the insertion hole, and the feeder is connected to a predetermined position when rotated. on either of the two antenna components that can be erected. 2. The antenna according to claim 1, characterized in that: a conversion mechanism is provided on the above-mentioned rotating shaft, which is used to connect the feeding device to the above-mentioned first antenna part or the second antenna part made of different lengths; When the antenna is rotated to a predetermined position, the first antenna element or the second antenna element is erected. 3. The antenna according to claim 1, wherein a matching circuit is provided at one or both of the feeding points of the first antenna element or the second antenna element. 4. The antenna according to claim 1, wherein said first antenna member and said second antenna member are formed on a plate-like insulator. 5. The antenna according to claim 1, wherein the first antenna element is formed into a whip shape, and the second antenna element is formed into a helical shape. 6. An antenna, characterized in that: the antenna is equipped with a first antenna part and a second antenna part arranged in a straight line and made into different shapes; the lower ends of the first antenna part and the second antenna part are fixed Form an integral body on the rotating shaft; through the pivot of the above-mentioned rotating shaft, the above-mentioned first antenna component and the second antenna component are respectively positioned on the two surfaces of the above-mentioned housing; using the pivot on the above-mentioned housing The rotating shaft rotatably supports the above-mentioned integrated antenna; when the antenna is rotated to a predetermined position, the feeding device is connected to the above-mentioned first antenna member or second antenna member erected. 7. The antenna according to claim 6, characterized in that: a conversion mechanism is provided on the above-mentioned rotating shaft, which is used to connect the feeding device to the above-mentioned first antenna part or the second antenna part made of different lengths; When the antenna is rotated to a predetermined position, the first antenna element or the second antenna element is erected. 8. The antenna according to claim 6, wherein a matching circuit is provided at one or both of the feeding points of the first antenna element or the second antenna element. 9. The antenna according to claim 6, wherein the first antenna element and the second antenna element are formed on a plate-shaped insulator. 10. The antenna according to claim 6, wherein the first antenna part is formed into a whip shape, and the second antenna part is formed into a helical shape.

Images