CN1306654C - Mobile communication terminal built-in antenna - Google Patents

Abstract

A built-in antenna for a mobile communication terminal, comprising a conductor unit (101), composed of a printed circuit board, a metal layer peeling area is arranged on the top of the conductor unit; the antenna unit (102), composed of a printed circuit board The circuit board is composed of a metal layer peeling area on the top of the conductor unit and is vertically connected, and the antenna unit has a grounding pin and a feeding pin connected to the internal circuit of the mobile communication terminal; the antenna parasitic unit (103), one end of which is connected to the The antenna unit is connected, and the other end is spaced from and parallel to the antenna unit. The antenna has an extremely small size, can effectively work in the GSM/DCS frequency band, and has medium gain and low SAR.

Description

Mobile communication terminal built-in antenna

technical field

The invention relates to an antenna for a mobile communication terminal, in particular to a terminal built-in antenna in a GSM/DCS dual-frequency mobile communication system.

Background technique

With the rapid development of mobile communication technology and the wide application of mobile communication systems, mobile phones, as terminal products of mobile communication systems, are moving toward miniaturization and multi-mode (compatible with GSM900/DCS1800, PCS, IS-95 and The upcoming 3G system) and the direction of high performance.

For mobile communication terminal manufacturers, the radio frequency (RF) part, baseband part and digital signal processing (DSP) part have achieved a high degree of integration so far, which has effectively promoted the miniaturization of mobile communication terminal equipment. and lower costs. Only the antenna feeder part, especially the antenna part of the mobile communication terminal, because its performance and structural size are affected by the structure, size, installation position of electronic components and the performance of the housing material of the mobile communication terminal, the technological progress is very slow. , resulting in the current mobile communication terminal antenna integration is still low, the price is also high, restricting the further development of mobile communication terminal technology. At the same time, the combination of mobile communication and computer network will make this problem more prominent in the future multi-mode mobile communication terminal technology.

On the other hand, with the strengthening of people's awareness of the harm of electromagnetic radiation from mobile communication terminals to the human body, users are increasingly demanding that mobile communication terminals must have low electromagnetic radiation indicators without degrading the performance of existing mobile communication terminal equipment. . The commonly used external antenna technology for mobile communication terminals, in principle, uses antennas with symmetrical structures and their combinations. The radiation directionality of this antenna is also symmetrical, so it cannot meet the above requirements of users at all. required.

The built-in antenna technology is really an antenna technology produced under this demand. The built-in antenna can not only make the shape design of the mobile communication terminal more flexible and smaller, but also achieve a lower specific signal absorption ratio (SAR) and a higher peak gain (Peak Gain), and the built-in antenna can also be used in a relatively small The antenna array is implemented in a volume of . It can be predicted that the built-in antenna will be the development direction of the mobile communication terminal antenna in the future.

However, the existing planar built-in antennas are all designed and manufactured in a two-dimensional plane. Since there are only two design degrees of freedom, there are the following disadvantages:

1. The volume is too large to be used for miniaturized mobile communication terminals (such as small mobile phones) that have strict size requirements;

2. The installation of the built-in antenna requires a support frame or needs to be connected to the housing, which not only increases the production cost, but also reduces the reliability and maintainability;

3. The electrical performance index is low, such as the relatively high standing wave of the in-band voltage, which affects the antenna efficiency and increases the power consumption of the mobile phone.

Contents of the invention

The object of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a mobile communication terminal built-in antenna with a three-dimensional space structure suitable for mobile communication terminals.

According to one aspect of the present invention, a built-in antenna for a mobile communication terminal is provided, the built-in antenna includes a conductor unit, which is composed of a printed circuit board, and there is a metal layer peeling area on the top of the conductor unit; the antenna unit consists of It consists of a printed circuit board, which is vertically connected to the metal layer peeling area on the top of the conductor unit, and the antenna unit has a grounding pin and a feeding pin connected to the internal circuit of the mobile communication terminal; the antenna parasitic unit is installed at one end On one side of the antenna unit, the other end is spaced from and parallel to the other side of the antenna unit.

Wherein, the antenna unit may be substantially rectangular, which has a first long side connected to the conductor unit, a second long side opposite to the first long side away from the conductor unit, and a pair of opposite first and second Two short sides; and the middle part of the second face of the antenna unit may have a "C"-shaped etching area, the "C"-shaped opening faces the second short side, and the etching area is separated from the antenna unit. Starting from the middle of the second long side, extending to the first long side of the antenna unit, then extending to the first short side, then extending to the first long side, extending to the second short side, and at the tail to the The second long side is raised.

According to another aspect of the present invention, there is provided a mobile communication terminal with a built-in antenna according to the above mobile communication terminal, wherein the mobile communication terminal includes a ground plate, and the ground plate serves as a conductor unit.

Description of drawings

1 is a front view of a mobile communication system terminal built-in antenna according to an embodiment of the present invention;

Fig. 2 is a left view of the mobile communication system terminal built-in antenna shown in Fig. 1 according to an embodiment of the present invention;

3 is a bottom view of an antenna unit of a mobile communication system terminal built-in antenna according to an embodiment of the present invention;

4 is a front view of the antenna unit and the parasitic unit of the built-in antenna of the mobile communication system terminal according to an embodiment of the present invention;

Fig. 5 is an equivalent diagram of the principle of the antenna unit;

6 is a bottom view of the antenna unit and the parasitic unit of the built-in antenna of the mobile communication system terminal according to an embodiment of the present invention;

Fig. 7 is a front view of the antenna unit and the parasitic unit of the built-in antenna of the mobile communication system terminal shown in Fig. 6 according to an embodiment of the present invention;

Fig. 8 is a part of the conductor unit of the built-in antenna of the mobile communication system terminal according to an embodiment of the present invention, which is used to show the connection relationship between the conductor part and the antenna unit;

9 is a part of the antenna unit and the conductor unit of the built-in antenna of the mobile communication system terminal according to an embodiment of the present invention, which is used to show the connection relationship between the conductor part and the antenna unit;

Fig. 10 is the voltage standing wave ratio test curve of the built-in antenna of the mobile communication system terminal according to an embodiment of the present invention;

Fig. 11 is the test curve of the 900Mhz E plane pattern of the built-in antenna of the mobile communication system terminal according to an embodiment of the present invention;

Fig. 12 is the 900Mhz H plane pattern test curve of the built-in antenna of the mobile communication system terminal according to an embodiment of the present invention;

Fig. 13 is the test curve of the 1800Mhz E plane pattern of the built-in antenna of the mobile communication system terminal according to an embodiment of the present invention;

FIG. 14 is a perspective view of a built-in antenna of a mobile communication system terminal according to an embodiment of the present invention.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

FIG. 1 is a front view of a built-in antenna of a mobile communication system terminal according to an embodiment of the present invention. Fig. 2 is a left side view of the built-in antenna of the mobile communication system terminal according to the embodiment of the present invention shown in Fig. 1 . As shown in FIGS. 1 and 2 , the mobile communication system terminal built-in antenna of the present invention consists of three parts: a conductor unit 101 , an antenna unit 102 and an antenna parasitic unit 103 .

The conductor unit 101 is a rectangular printed circuit board with a metal layer peeling area 111 on the top. The antenna unit 102 is a printed circuit board, which is vertically connected to the metal layer peeling area 111 on the top of the conductor unit 101 . The antenna parasitic unit 103 is a sheet of conductive material with a certain strength, such as a metal sheet. The antenna parasitic unit 103 is installed on the right side of the antenna unit 102, connected to it on the top of the antenna unit 102, drawn to the right edge of the antenna unit 102, and kept parallel to the bottom surface of the antenna unit 102 after two straight bends And no contact state.

The conductor unit 101 can be the grounding plate of the mobile communication terminal, and does not need a separate conductor unit, so that the volume of the mobile communication terminal can be greatly reduced. The antenna unit 102 is a double-sided copper-clad printed circuit board with three conductive strips printed on the top surface.

FIG. 3 is a bottom view of the antenna unit 102 of the built-in antenna of the mobile communication system terminal according to the embodiment of the present invention. There are three legs on the long side of the antenna unit 102 close to the conductor unit 101 , which are the grounding leg 204 , the feeding leg 205 and the supporting leg 206 in sequence. The grounding pin 205 is connected to the ground terminal of the mobile communication terminal, and the feeding pin 205 is connected to the internal circuit of the mobile communication terminal for transmitting receiving and sending signals. The above three pins are respectively connected to the three conductive strips 207, 208 and 209 on the top surface (shown by dotted lines in FIG. 3 ). As shown in Figure 3, the conductive strip 207 connected to the grounding pin 204 is connected to the grounding point 201 on the bottom surface of the antenna unit 102 through the grounding metallization hole on both sides of the antenna unit 102; the conductive strip connected to the feeding pin 205 208 , connected to the feed point 202 on the bottom surface of the antenna unit 102 through the feed metallization holes penetrating both sides of the antenna unit 102 .

As shown in FIG. 3 , there is a substantially "C"-shaped etched area 211 in the middle of the bottom surface of the antenna unit 102. The etched area 211 starts from the middle of the long side of the antenna unit 102 away from the conductor unit 101 and goes downward first. , then extend to the left, then downward, extend to the right, and protrude toward the long side away from the conductor unit 101 at the tail.

4 is a front view of an antenna unit and a parasitic unit of a built-in antenna of a mobile communication system terminal according to an embodiment of the present invention. As shown in the figure, the antenna parasitic unit 103 is connected to the antenna unit 102 on the top surface, and then goes through two bends along the right side of the antenna unit 102 to extend parallel to but not in contact with the bottom surface of the antenna unit 102 .

The principle of the built-in antenna of the mobile communication terminal of the present invention will be described below. The three parts of the built-in antenna of the mobile communication terminal of the present invention, namely the conductor unit 101, the antenna unit 102 and the antenna parasitic unit 103, jointly participate in the conversion of electromagnetic waves and high-frequency currents.

The function of the conductor unit 101 is to form an open structure for converting electromagnetic waves and high-frequency currents together with the antenna unit 102 and the parasitic unit 103 , and at the same time make the electromagnetic wave radiation/reception of the antenna unit 102 and the parasitic unit 103 directional.

The etching pattern on the bottom surface of the antenna unit 102 forms two parallel electromagnetic resonators, whose function is to select the frequency of the carrier signal, and its requirement is to meet the bandwidth requirements of GSM900 and DCS1800 while having low loss. The intersection point of the two parallel electromagnetic resonators is at the feeding point 202 and share the same feeding point.

Fig. 5 is a principle equivalent diagram of the antenna unit. As shown in FIG. 5 , there are two open circuits of different lengths on both sides of the feeding point 202 . Assume that the length of the conduction band LA from the feed point 202 to the apex of the longer segment is La, and the length of the conduction band LB from the feed point 202 to the apex of the shorter segment is Lb. In order to make the two resonators work in the GSM900 and DCS1800 frequency bands, their geometric shapes must meet: the length shown by the geometric shapes must meet the resonator condition, that is, the quarter waveguide wavelength condition. For this, La and Lb should satisfy:

$\mathrm{<span\; class="notranslate">\; La</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; \&lambda;</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{\mathrm{<span\; class="notranslate">\; 4</span>}\sqrt{{\mathrm{<span\; class="notranslate">\; \&epsiv;</span>}}_{\mathrm{<span\; class="notranslate">\; re</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

$\mathrm{<span\; class="notranslate">\; Lb</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; \&lambda;</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 4</span>}\sqrt{{\mathrm{<span\; class="notranslate">\; \&epsiv;</span>}}_{\mathrm{<span\; class="notranslate">\; re</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

Among them, La, λ ₁ , ε _re1 are the length of the conduction band LA, the working wavelength of GSM900 and the effective dielectric constant of the medium below the conduction band LA; Lb, λ ₂ , ε _re2 are the length of the conduction band LB, and the working wavelength of DCS1800 and the effective permittivity of the medium below the conduction band LB.

As mentioned above, two electromagnetic resonant circuits, namely LA and LB, are formed on the antenna unit 102, and they resonate in two operating frequency bands (GSM900/DCS1800) respectively. However, the high-frequency current at the low-frequency end (GSM900 frequency band) presents a relatively high reactance at the feeding point of the antenna unit 102, so the VSWR of the antenna is very high on GSM900, resulting in low radiation efficiency of the built-in antenna in this frequency band . The antenna parasitic unit 103 of the built-in antenna of the present invention is to solve this problem.

The present invention will be further described below in conjunction with an embodiment of the present invention.

FIG. 6 is a bottom view of an antenna unit and a parasitic unit of a built-in antenna of a mobile communication terminal according to an embodiment of the present invention. As shown in FIG. 6, in this embodiment, in the bottom surface etching pattern of the antenna unit 102, the distance from the left edge of the opening of the etching region 211 to the left side of the antenna unit 102 on the long side away from the conductor unit 101 side L1=20.0mm; the distance L2=14.0mm from the right edge of the opening of the etching area 211 to the right side of the antenna unit 102; the distance L3=5.5mm from the leftmost edge of the etching area 211 to the left side of the antenna unit 102; The distance L4=6.5mm from the right edge of the etched area 211 most protruding to the left side to the left side of the antenna unit 102; The left distance L5=21.0mm; the distance L6=22.2mm from the root of the protrusion at the end of the etching area 211 to the antenna unit 102=22.2mm; the distance L7=3.8mm from the feeding point 202 to the left side of the antenna unit 102; the ground point 201 to the antenna The distance L8=1.5mm on the left side of the unit 102; the distance L9=6.5mm from the rightmost edge of the etching area 211 to the right side of the antenna unit 102; the distance L11= from the supporting foot 206 and the corresponding conductive strip 209 to the right side of the antenna unit 102 2.0mm.

As shown in Figure 6, the distance w1=2.1mm from the feeding point 202 to the long side of one side of the conductor unit 101 to the antenna unit 102; 5.9mm; Antenna parasitic unit 103 to conductor unit 101 side edge to antenna unit 102 distance w3=0mm to conductor unit 101 side long side; Antenna parasitic unit 103 is away from conductor unit 101 side edge to antenna unit 102 to conductor The distance w4=6.0mm from the long side of one side of unit 101; the distance w5=5.5mm from the top of the end protrusion of the etching area 211 to the long side of the antenna unit 102 towards the conductor unit 101; the etching area 211 is the farthest away from the conductor unit The distance w6=5.0mm from the outer edge of one side of the antenna unit 101 to the long side of the conductor unit 101 from the antenna unit 102; The distance w7=4.7mm of the long side of the side; the distance w8=2.6mm from the inner edge of the etched area 211 closest to the side of the conductor unit 101 to the long side of the antenna unit 102 to the conductor unit 101; the etched area 211 is the closest The distance w9 from the outer edge of one side of the conductor unit 101 to the long side of the antenna unit 102 facing the conductor unit 101 is 2.2 mm.

FIG. 7 is a front view of the antenna unit and the parasitic unit of the built-in antenna of the mobile communication system terminal according to this embodiment of the present invention shown in FIG. 6 . As shown in Figure 7, the thickness H=1.0mm of the antenna unit 102; the width wf=1.5mm of the conductive strip 208 connected to the feed point 202; the width wg=1.5mm of the conductive strip 207 connected to the ground point 201 Antenna parasitic unit 103 is at the distance L10=14.5mm from the left side edge of one side of antenna unit bottom surface to the right side edge of antenna unit 102; The distance wj=3.0mm.

FIG. 8 is a part of the conductor unit 101 of the built-in antenna of the mobile communication terminal according to this embodiment. In this figure, it can be seen that the three blind holes 204', 205' and 206' that will be respectively connected with the ground pin 204, the feed pin 205 and the support pin 206 of the antenna unit 102, the width of the blind hole WN1=1.0 mm.

FIG. 9 is a part of the antenna unit and the conductor unit of the built-in antenna of the mobile communication terminal according to this embodiment. As shown in Figure 9, the distance LA1=2.0mm from the edge on both sides of the antenna element 102 to the edge on both sides of the conductor element 101; the distance WA2=4.0mm from the bottom surface of the antenna element 102 to the bottom edge of the stripping zone 111 at the top of the conductor element 101; The distance WA1 from the top surface of the unit 102 to the top edge of the conductor unit 101 is 2.0 mm; the distance WA3 from the top edge of the conductor unit 101 to the bottom edge of the stripped area 111 on the top of the conductor unit 101 is 7.0 mm.

According to this embodiment of the present invention, the above values can have a certain tolerance as follows: L1=20.0±0.1mm, L3=5.5±0.1mm, L4=6.5±0.02mm, L5+L2=21.0±0.1mm, L6 =22.2±0.1mm, L7=3.8±0.02mm, L8=1.5±0.02mm, L9=6.5±0.02mm, L10=14.5±0.02mm, L11=2.0±0.02mm; w1=2.1±0.02mm, w2= 5.9±0.02mm, w3=±0.1mm, w4=6.0±0.1mm, w5=5.5±0.1mm, w6=5.0±0.1mm, w vector 7=4.7±0.1mm, w8=2.6±0.1mm, w9= 2.2±0.1mm, H=1.0mm, wt=1.5±0.1mm, wj=3.0±0.1mm, wg=1.5±0.1mm, and the rest are ±0.1mm.

Put the mobile communication terminal built-in antenna according to the embodiment of the present invention into an ABS plastic cover of 98mm*40mm*16mm and fix it, and place it on a 3D test stand. Put the test frame together with the antenna and install it in the microwave anechoic room. Use the HP8753E vector network analyzer to test the voltage standing wave ratio of the antenna. Measuring antenna pattern test and gain with antenna analyzer and comparison method.

10 to 13 are test results of electrical performance parameters of the built-in antenna of the mobile communication terminal according to the embodiment of the present invention. It can be seen from FIG. 10 that the built-in antenna of the mobile communication terminal according to the embodiment of the present invention can effectively work in the GSM900/DCS1800 frequency band. As can be seen from Figures 11 to 13, the spatial pattern characteristics of the built-in antenna of the present invention; on the H surface, 75 degrees with the outer normal direction, there is a 30dB energy depression, which corresponds to the position of the human head, also in the E plane, corresponding to the direction of the head position of the human body, has an energy depression of 4dB. Therefore, this curve reveals that the mobile phone built-in antenna of the present invention has low SAR characteristics, that is, it has a certain protective effect on the human body. Further measurements, it can be concluded that the antenna has a medium gain (greater than 0.5dBi).

In addition, according to other embodiments of the present invention, the pattern of the top surface and the bottom surface of the antenna unit 102 can be mirrored, the top surface and the bottom surface of the antenna unit 102 can also be reversed, and the corresponding antenna parasitic unit 103 can be placed on the top surface of the antenna unit 102. Parallel spaced above.

According to another embodiment of the present invention, a mobile phone is equipped with the above-mentioned built-in antenna, and the grounding main board of the mobile phone is used as the conductor unit 101 of the built-in antenna, and the feed pin 205 of the antenna unit 102 is electrically connected to the circuit in the mobile phone The duplexer of the RF section.

The present invention has been described above in conjunction with specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and various changes and modifications are possible. For example, the etching pattern of the antenna unit 102 can also have other changes, which can also meet the requirements of forming a resonant circuit, or other changes in specific shapes and distances. Without departing from the spirit of the present invention, all these changes and modifications should be included in the protection scope of the appended claims.

Claims (15)

1. a mobile communication terminal built-in antenna comprises

Conductor element (101) is made of a printed circuit board, and a metal level stripping area (111) is arranged at the top of described conductor element;

Antenna element (102) is made of a printed circuit board, and with vertical connection of metal level stripping area at described conductor element top, described antenna element has grounding leg (204) and the feed pin (205) that links to each other with circuit in the described mobile communication terminal;

Antenna parasitic element (103), the one end is installed in the one side of described antenna element, the other end and described antenna element another side interval and parallel.

2. according to the mobile communication terminal built-in antenna of claim 1, wherein said conductor element is the ground plate of described mobile communication terminal.

3. according to the mobile communication terminal built-in antenna of claim 1, wherein said antenna element is the printed circuit board of a double-sided copper-clad.

4. according to the mobile communication terminal built-in antenna of claim 3, wherein

First face of described antenna element is printed with three conduction bands, is connected respectively to an end of described grounding leg, feed pin and antenna parasitic element;

Second mask of described antenna element has: a distributing point (202), and it links to each other with the described conduction band that is connected to the feed pin by a plated-through hole that runs through the two sides; An earth point (201), it links to each other with the described conduction band that is connected to grounding leg by the plated-through hole that another runs through the two sides.

5. according to the mobile communication terminal built-in antenna of claim 4, wherein

Second face of described antenna element is etched and forms with the distributing point is the electromagnetic resonator of two parallel connections of joint.

6. according to the mobile communication terminal built-in antenna of claim 5, wherein

The be etched conduction band length of two electromagnetic resonator forming of second face of described antenna element is La and Lb, and La and Lb satisfy:

$\mathrm{La}=\frac{{\mathrm{\&lambda;}}_1}{4\sqrt{{\mathrm{\&epsiv;}}_{\mathrm{re}1}}}$ $\mathrm{Lb}=\frac{{\mathrm{\&lambda;}}_2}{4\sqrt{{\mathrm{\&epsiv;}}_{\mathrm{re}2}}}$

λ wherein ₁And ε _Re1Be respectively the effective dielectric constant of medium below the conduction band that first operation wavelength and length are La; λ ₂And ε _Re2Second operation wavelength and length are the effective dielectric constant of medium below the conduction band of Lb respectively.

7. according to the mobile communication terminal built-in antenna of claim 6, wherein said first operation wavelength is the operation wavelength of GSM900 frequency range correspondence, and described second operation wavelength is the operation wavelength of DCS1800 frequency range correspondence.

8. according to the mobile communication terminal built-in antenna of claim 7, wherein,

Described antenna element is rectangular substantially, and it has first long side that links to each other with conductor element, second long side away from conductor element relative with first long side, and a pair of first and second relative short sides;

There is an etched area (211) that is " C " shape at second middle part of described antenna element, the opening of its " C " shape is towards the second short side, this etch areas is from the middle part of second long side of described antenna element, first long side to antenna element extends, extend to the first short side then, extend to first long side again, extend to the second short side, and at afterbody to the second long side projection.

9. mobile communication terminal built-in antenna according to Claim 8, wherein

Distributing point is to the distance L 7=3.8mm of the first short side of antenna element;

Earth point is to the distance L 8=1.5mm of the first short side of antenna element;

The bus that links to each other with antenna parasitic element brings to the distance L 11=2.0mm of the second short side of antenna element;

Distributing point to first long side of antenna element apart from w1=2.1mm;

Earth point to first long side of antenna element apart from w2=5.9mm.

10. according to the mobile communication terminal built-in antenna of claim 9, wherein

Described second etching pattern at antenna element, the edge of the first short side of the close antenna element of etched area opening is to the distance L 1=20.0mm of the first short side of antenna element on second long side of antenna element;

The edge of the second short side of the close antenna element of described etched area opening is to the distance L 2=14.0mm of the second short side of antenna element;

Etched area the edge of the first short side of close antenna element to the distance L 3=5.5mm of the first short side of antenna element;

Etched area is lacked the distance L 4=6.5mm of the recessed edge of side to the first short side of antenna element to first of antenna element;

The edge of the close antenna element second short side of etched area opening is to the distance L 5=21.0mm of the antenna element second short side on second long side of antenna element;

The root of etched area terminal process is to the distance L 6=22.2mm of the first short side of antenna element;

The edge of the most close antenna element second short side of etched area is to the distance L 9=6.5mm of the antenna element second short side;

The top of etched area terminal process to antenna element first long side apart from w5=5.5mm;

Etched area away from the outer rim of antenna element first long side to antenna element first long side apart from w6=5.0mm;

Etched area away from the inner edge of antenna element first long side to antenna element first long side apart from w7=4.7mm;

Etched area near the inner edge of antenna element first long side to antenna element first long side apart from w8=2.6mm;

Etched area near the outer rim of antenna element first long side to antenna element first long side apart from w9=2.2mm.

11. according to the mobile communication terminal built-in antenna of claim 4, wherein said antenna parasitic element is a slice sheet metal.

12. mobile communication terminal built-in antenna according to claim 11, wherein said antenna parasitic element is connected with described antenna element first of described antenna element, directly bends parallel with described antenna element and extend at interval in second outside of described antenna element through two.

13. according to the mobile communication terminal built-in antenna of claim 12, the distal-most edge that wherein said antenna parasitic element is extended in second outside of antenna element is to the distance L 10=14.5mm of the antenna element second short side; Antenna parasitic element one end parallel with antenna element and that extend at interval to first of antenna element apart from wj=3.0mm.

14. according to the mobile communication terminal built-in antenna of claim 13, wherein

Antenna parasitic element to conductor element one lateral edges to antenna element first long side apart from w3=0mm;

Antenna parasitic element away from conductor element one lateral edges to antenna element first long side apart from w4=6.0mm.

15. a mobile communication terminal that has according to the mobile communication terminal built-in antenna of above-mentioned each claim, wherein this mobile communication terminal comprises a ground plate, and described ground plate is used as conductor element (101).

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