CN101582532A - Coplanar coupling type antenna for feeding multi-frequency mobile communication device - Google Patents

Abstract

The invention relates to a coplanar coupling type feed-in multi-frequency mobile communication device antenna, which mainly comprises: a dielectric substrate, a ground plane, a radiation part, a short circuit metal part and a feed-in part. The ground plane is positioned on one surface of the medium substrate; the radiation part, the short circuit metal part and the feed-in part are all positioned on the medium substrate, have the same surface and are close to the vicinity of one edge of the grounding surface; one end of the short circuit metal part is connected to the radiation part, and the other end of the short circuit metal part is connected to the ground plane; the feed-in part comprises a first feed-in metal part and a second feed-in metal part, the first feed-in metal part is provided with a feed-in point which is the feed-in point of the antenna, one end of the second feed-in metal part is connected to the radiation part, and a specific space is formed between the second feed-in metal part and the first feed-in metal part.

Description

Coplanar Coupling Feed Multi-Frequency Mobile Communication Device Antenna

technical field

The invention relates to an antenna for a multi-frequency mobile communication device, in particular to an antenna for a multi-frequency mobile communication device with coplanar coupling feed-in.

Background technique

With the vigorous development of wireless communication, various wireless communication technologies and products continue to progress and appear, and various mobile phones also appear, from the original dual-frequency operation to multi-frequency operation, to meet Today's mobile phones demand more communication frequency bands. It is a difficult challenge for the original traditional inverted-F-shaped antenna to operate in the GSM850/900 frequency band at low frequencies using a single resonance path under a limited volume. For example, Taiwan Patent Publication No. 490,884 "Dual-frequency inverted-F "Plate Antenna and Its Radiating Metal Sheet", which discloses an inverted F-shaped antenna to achieve dual-band operation, and the antenna design can only cover the GSM900 frequency band operation at low frequencies.

It can be seen that the above-mentioned existing multi-frequency mobile communication device antenna obviously still has inconveniences and defects in structure and use, and needs to be further improved urgently. In order to solve the problems existing in multi-frequency mobile communication device antennas, relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable structure for general products to solve the above problems , this is obviously a problem that relevant industry players are eager to solve.

In view of the defects existing in the above-mentioned existing multi-frequency mobile communication device antennas, the inventor actively researches and innovates based on years of rich practical experience and professional knowledge engaged in the design and manufacture of such products, and cooperates with the application of academic theories, in order to create a The novel structure coplanar coupling feeding multi-frequency mobile communication device antenna can improve the general existing multi-frequency mobile communication device antenna and make it more practical.

In order to solve the above problems, we propose a coupled feed antenna design suitable for multi-frequency mobile communication devices, covering GSM850 (824-894MHz), GSM900 (890-960MHz), DCS (1710-1880MHz), PCS (1850MHz -1990MHz) and UMTS (1920-2170MHz) communication band requirements. This design uses a single antenna with two resonance paths to achieve broadband operation in two resonance frequency bands. The low frequency band mainly uses coplanar coupling feeding to reduce the overall inductance of the antenna, so that the original low frequency single resonance mode can achieve double resonance mode. The effect of the state can cover the GSM850/900 frequency band operation, and the antenna structure is simple, easy to print or etch on a single surface of the dielectric substrate, making the production cost low, so the antenna of the present invention is suitable for the needs of mobile communication devices.

Through continuous research, design, and after repeated trial samples and improvements, the present invention with practical value is finally created.

Contents of the invention

The main purpose of the present invention is to overcome the defects existing in the existing multi-frequency mobile communication device antenna, and provide a new coplanar coupling feeding multi-frequency mobile communication device antenna. The technical problem to be solved is to provide a The coplanar coupling feeding multi-frequency mobile communication device antenna design can cover the operation of GSM850/900, DCS, PCS and UMTS frequency bands, so it is more suitable for practical use and has industrial utilization value.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. According to the present invention, a coplanar coupling feeding multi-frequency mobile communication device antenna includes:

a dielectric substrate;

A ground plane, located on a surface of the dielectric substrate, has a short-circuit point, and the short-circuit point is located at an edge of the ground plane, and the edge is located in the inner region of the dielectric substrate;

a radiating part is located on a surface of the dielectric substrate, and the radiating part is located near an edge of the ground plane and does not overlap with the ground plane;

a short-circuit metal part, located on a surface of the dielectric substrate and on the same surface as the radiation part, one end of which is electrically connected to the radiation part, and the other end is electrically connected to the short-circuit point of the ground plane; and

A feed-in part is located on a surface of the dielectric substrate and is on the same surface as the radiation part, comprising:

A first feeding metal part has a feeding point, which is the feeding point of the antenna, and the feeding point is connected to a signal source;

A second feed-in metal part, one end of which is connected to the radiation part, has a specific distance between the second feed-in metal part and the first feed-in metal part.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

In the aforementioned coplanar coupling feed-in antenna for a multi-frequency mobile communication device, the dielectric substrate is a system circuit board of a mobile communication device.

In the aforementioned coplanar coupling feeding multi-frequency mobile communication device antenna, the radiating part includes:

a first metal portion having at least one bend;

A second metal part has at least one bend and is connected to the first metal part.

In the aforementioned coplanar coupling feeding multi-frequency mobile communication device antenna, the radiating part and the short-circuit metal part are made by punching or cutting a metal sheet.

In the aforementioned coplanar coupling feed-in antenna for multi-frequency mobile communication devices, the radiation portion, the short-circuit metal portion and the feed-in portion are formed on the dielectric substrate by printing or etching techniques.

In the aforementioned coplanar coupling feeding multi-frequency mobile communication device antenna, the specific distance between the second feeding metal part and the first feeding metal part is less than 3mm.

In the aforementioned coplanar coupling feeding multi-frequency mobile communication device antenna, the radiating part has at least one bend, so that a part of the radiating part is perpendicular to the ground plane.

The purpose of the present invention and the solution to its technical problems are also achieved by the following technical solutions. According to the present invention, a coplanar coupling feeding multi-frequency mobile communication device antenna includes:

a dielectric substrate;

A ground plane, located on a surface of the dielectric substrate, has a short-circuit point, and the short-circuit point is located at an edge of the ground plane, and the edge is located in the inner region of the dielectric substrate;

a radiating part is located on a surface of the dielectric substrate, and the radiating part is located near an edge of the ground plane and does not overlap with the ground plane;

a short-circuit metal part, located on a surface of the dielectric substrate and on the same surface as the radiation part, one end of which is electrically connected to the radiation part, and the other end is electrically connected to the short-circuit point of the ground plane; and

A feed-in metal part is located on a surface of the dielectric substrate and is on the same surface as the radiation part, and has a feed-in point, which is the feed-in point of the antenna, and the feed-in point is connected to a signal source, and the There is a specific distance between the feeding metal part and the radiation part.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

In the aforementioned coplanar coupling feed-in antenna for a multi-frequency mobile communication device, the dielectric substrate is a system circuit board of a mobile communication device.

In the aforementioned coplanar coupling feeding multi-frequency mobile communication device antenna, the radiating part includes:

a first metal portion having at least one bend; and

A second metal part has at least one bend and is connected to the first metal part.

In the aforementioned coplanar coupling feeding multi-frequency mobile communication device antenna, the radiating part and the short-circuit metal part are made by punching or cutting a metal sheet.

In the aforementioned coplanar coupling feed-in antenna for multi-frequency mobile communication devices, the radiation portion, the short-circuit metal portion, and the feed-in metal portion are formed on the dielectric substrate by printing or etching techniques.

In the aforementioned coplanar coupling feeding multi-frequency mobile communication device antenna, the specific distance between the feeding metal part and the radiation part is less than 3mm.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. As can be seen from the above technical solutions, in order to achieve the aforementioned object of the invention, the main technical contents of the present invention are as follows:

The present invention proposes a coplanar coupling feed-in multi-frequency mobile communication device antenna, which mainly includes: a dielectric substrate, a ground plane, a radiation part, a short-circuit metal part and a feed-in part. The ground plane is located on a surface of the dielectric substrate; the radiation part, the short-circuit metal part and the feed-in part are all located on the dielectric substrate on the same surface and near an edge of the ground plane; the short-circuit metal part One end is connected to the radiation part, and the other end is connected to the ground plane; the feed-in part includes a first feed-in metal part and a second feed-in metal part, and the first feed-in metal part has a feed-in point, which is As for the feeding point of the antenna, one end of the second feeding metal part is connected to the radiation part, and there is a certain distance between the second feeding metal part and the first feeding metal part.

With the above-mentioned technical solution, the antenna of the present invention having a coplanar coupling feed-in multi-frequency mobile communication device has at least the following advantages:

1. The coplanar coupling feed-in multi-frequency mobile communication device antenna of the present invention is a single antenna with two resonant paths to achieve broadband operation of two resonant frequency bands. Sensitivity, so that the original low-frequency single resonance mode achieves the effect of double resonance modes to cover the GSM850/900 frequency band operation, and the antenna structure is simple, easy to print or etch on a single surface of the dielectric substrate, making the production cost low, so the present invention Antennas are suitable for the needs of mobile communication devices.

2. The antenna of the present invention provides a coplanar coupling feed multi-frequency mobile communication device antenna design, which can cover the operation of GSM850/900, DCS, PCS and UMTS frequency bands.

To sum up, the coplanar coupling feed-in multi-frequency mobile communication device antenna with the special structure of the present invention has the above-mentioned many advantages and practical value, and there is no similar structural design and method published or published in similar products. It is indeed an innovation when used. It has a great improvement in both product structure and function, and has made great progress in technology, and has produced easy-to-use and practical effects, and it is better than the existing multi-frequency mobile communication. The device antenna has multiple enhanced functions, so it is more suitable for practical use, and has wide application value in the industry. It is a novel, progressive and practical new design.

The above description is only an overview of the technical solutions of the present invention. In order to understand the technical means of the present invention more clearly and implement them according to the contents of the description, the preferred embodiments of the present invention and accompanying drawings are described in detail below.

Concrete structure of the present invention is provided in detail by following embodiment and accompanying drawing.

Description of drawings

FIG. 1 is a structure diagram of an embodiment of an antenna of a coplanar coupling feeding multi-frequency mobile communication device according to the present invention.

FIG. 2 is a measurement result of the return loss of an embodiment of the coplanar coupling feeding multi-frequency mobile communication device antenna of the present invention.

FIG. 3 is a radiation pattern diagram at 859 MHz of an embodiment of the coplanar coupling feed-in multi-frequency mobile communication device antenna of the present invention.

FIG. 4 is a radiation pattern diagram at 925 MHz of an embodiment of the coplanar coupling feed-in multi-frequency mobile communication device antenna of the present invention.

FIG. 5 is a radiation pattern diagram at 1795 MHz of an embodiment of the coplanar coupling feeding multi-frequency mobile communication device antenna of the present invention.

FIG. 6 is a radiation pattern diagram at 1920 MHz of an embodiment of the coplanar coupling feed-in multi-frequency mobile communication device antenna of the present invention.

FIG. 7 is a radiation pattern diagram at 2045 MHz of an embodiment of the coplanar coupling feed-in multi-frequency mobile communication device antenna of the present invention.

FIG. 8 is a structural diagram of the first other embodiment of the coplanar coupling feed-in multi-frequency mobile communication device antenna of the present invention.

FIG. 9 is a structural diagram of another second embodiment of the antenna of the coplanar coupling feeding multi-frequency mobile communication device antenna.

1: An embodiment of the antenna of the present invention

8: The first other embodiment of the antenna of the present invention

9: Second other embodiment of the antenna of the present invention

11: Dielectric substrate

12: Ground plane

120: One edge of the ground plane

121: Short circuit point of the ground plane

13, 83, 93: radiation department

131, 831, 931: short-circuit point of the radiation part

132, 832, 932: First Metal Department

133, 833, 933: the second metal part

134, 834, 934: connection points of the first metal part and the second metal part

14, 84, 94: short circuit metal parts

15, 85: Feed-in part

151, 851: the first feed metal part

152, 852: Feed point

153, 853: The second feed metal part

154, 854: specific spacing between the first feed metal part and the second feed metal part

16: Signal source

21: Low frequency band

22: High frequency band

801: Bending

95: Feed into metal part

951: Specific spacing between the feed metal part and the radiating part

952: Feed point

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the following is a specific implementation of the coplanar coupling feeding multi-frequency mobile communication device antenna proposed according to the present invention in conjunction with the accompanying drawings and preferred embodiments. Mode, structure and effect thereof are as follows in detail.

The coplanar coupling feed-in multi-frequency mobile communication device antenna of the present invention comprises: a dielectric substrate; a ground plane, located on a surface of the dielectric substrate, having a short-circuit point, and the short-circuit point is located on a side of the ground plane An edge, the edge is located in the inner section of the dielectric substrate; a radiation portion is stamped or cut from a single metal sheet, and can also be formed on the dielectric substrate by printing or etching technology, and is located on a side of the dielectric substrate. on the surface, and the radiating portion is near an edge of the grounding plane, and does not overlap with the grounding plane; a short-circuit metal part and the radiating part can be stamped or cut from a single metal sheet, or can be printed or The etching technology is formed on the dielectric substrate and is located on the same surface as the radiating part, one end of which is electrically connected to the radiating part, and the other end is electrically connected to the short-circuit point of the ground plane; and a feed-in part is located on the dielectric substrate On a surface, and located on the same surface as the radiating part, it includes: a first feeding metal part, which has a feeding point, which is the feeding point of the antenna, and the feeding point is connected to a signal source; a second One end of the feeding metal part is connected to the radiation part, and there is a specific distance between the second feeding metal part and the first feeding metal part. The feed-in part can use a single feed-in metal part to be directly separated from the radiating part by a specific distance, so as to achieve the effect of coupling excitation of the radiating part.

In the antenna of the present invention, the radiating part also includes a first metal part and a second metal part, both of which resonate in a quarter-wavelength mode, wherein the first metal part excites the high-frequency band of the antenna , and what is excited by the second metal part is the low frequency band, using the coplanar coupling feed-in, we can reduce the real part impedance value of the low frequency band (the quarter-wavelength resonance mode of the second metal part), and adjust The specific spacing between the second feed metal part and the first feed metal part effectively increases the capacitance to reduce the inductance of the low frequency band (quarter wavelength resonance mode of the second metal part), The zero point of the imaginary part of the antenna input impedance is additionally added near the quarter-wavelength resonant frequency point, and by properly adjusting the size of the short-circuit metal part, a good impedance matching can be achieved, and the radiation part is in the low frequency band The effect of dual resonance modes can be achieved, which can cover the frequency bands of the global mobile communication system (GSM850, 824-894MHz) and (GSM900, 890-960MHz) required by the wireless wide area network (WWAN), and the high frequency band is the first metal A broadband mode stimulated by the Department can cover three frequency bands of digital communication system (DCS, 1710-1880MHz), personal communication service system (PCS, 1850-1990MHz) and third-generation mobile communication (UMTS, 1920-2170MHz) .

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of Embodiment 1 of the coplanar coupling feed-in multi-frequency mobile communication device antenna of the present invention.

It mainly includes: a dielectric substrate 11; a ground plane 12, located on a surface of the dielectric substrate 11, with a short-circuit point 121, and the short-circuit point 121 is located at an edge 120 of the ground plane 12, and the edge 120 is also located at The inner section of the dielectric substrate 11; a radiation portion 13 is formed by punching or cutting a single metal sheet, and can also be formed on the dielectric substrate 11 by printing or etching technology, and is located on a surface of the dielectric substrate 11 , and the radiation portion 13 is located near an edge 120 of the ground plane 12 and does not overlap with the ground plane 12, including: a first metal portion 132 with at least one bend; a second metal portion 133 with At least one bending and connection to the first metal part 132; a short-circuit metal part 14 and the radiation part 13 can be stamped or cut from a single metal sheet, and can also be formed on the dielectric substrate 11 using printing or etching techniques on the same surface as the radiating portion 13, one end of which is electrically connected to the radiating portion 13, and the other end is electrically connected to the short-circuit point 121 of the ground plane 12; and a feed-in portion 15, which can be formed on the On the dielectric substrate 11, and on the same surface as the radiating part 13, it includes: a first feeding metal part 151 with a feeding point 152, which is the feeding point 152 of the antenna, and the feeding point 152 is connected to a signal Source 16 ; a second feeding metal part 153 , one end of which is connected to the radiation part 13 , and there is a specific distance 154 between the second feeding metal part 153 and the first feeding metal part 151 .

Please refer to FIG. 2 . FIG. 2 is the measurement result of the return loss of Embodiment 1 of the coplanar coupling feed-in multi-frequency mobile communication device antenna of the present invention.

The present invention selects the following dimensions for measurement in Embodiment 1: the length of the dielectric substrate 11 is about 110mm, and the width is about 60mm; the length of the ground plane 12 is about 100mm, and the width is about 60mm; the radiation part 13 includes: the first metal part The length of 132 is about 40mm (about a quarter wavelength of 1900MHz), and the width is about 1mm. The length of the second metal part 133 is about 83mm (about a quarter wavelength of 900MHz), and the width is about 1mm; The length of part 14 is about 3 mm and the width is about 1 mm; the feed-in part 15 includes: a first feed-in metal part 151 with a length of about 22 mm and a width of about 0.3 mm; a second feed-in metal part 153 with a length of about 20 mm, The width is about 0.6 mm, and there is a specific distance 154 between the second feeding metal part 153 and the first feeding metal part 151 of about 1.0 mm. According to the obtained experimental results, under the definition of 6dB return loss, the low frequency band 21 is sufficient to cover the GSM850/900 frequency band of WWAN, and the high frequency band 22 covers the three frequency bands of DCS, PCS and UMTS. In addition, the specific distance 154 can also be as wide as about 3mm, and then adjust the relative dimensions of other feed-in parts 15 to achieve a result similar to that shown in FIG. 2 .

Please refer to Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, which are the preferred embodiments of the coplanar coupling feeding multi-frequency mobile communication device antenna of the present invention at 859, 925, 1795, 1920 and 2045MHz respectively The radiation pattern diagram, the antenna gain is 1.20, 1.97, 2.29, 2.64 and 2.02dBi respectively. From the obtained results, the antenna of the present invention can meet the usage requirements of mobile communication products regardless of the low-frequency operating frequency band or the high-frequency operating frequency band.

Please refer to FIG. 8 , which is a structural diagram of the first other embodiment 8 of the coplanar coupling feed-in multi-frequency mobile communication device antenna of the present invention, wherein the radiating part 13 has at least one bend 801, so that the radiating part 13 A part of the section is approximately perpendicular to the ground plane 12 , thereby reducing the space required by the antenna in the mobile communication device. Other antenna structures are similar to those in Embodiment 1. Embodiment 8 of the present invention can also obtain a result similar to that of Embodiment 1, which meets the usage requirements of mobile communication products.

Please refer to FIG. 9, which is a structural diagram of the second other embodiment 9 of the coplanar coupling feeding multi-frequency mobile communication device antenna of the present invention, wherein a radiation part 93 is punched or cut from a single metal sheet. , can also be formed on the dielectric substrate 11 using printing or etching techniques, and located on a surface of the dielectric substrate 11, and the radiation portion 93 is located near an edge 120 of the ground plane 12, and does not interact with the ground plane 12. Overlapping, including: a first metal part 932 with at least one bend; a second metal part 933 with at least one bend and connected to the first metal part 932; a short-circuit metal part 94 with the radiation The part 93 can be stamped or cut from a single metal sheet, and can also be formed on the dielectric substrate 11 by printing or etching technology, and is on the same surface as the radiating part 93. One end is electrically connected to the radiating part 93, and the other end is electrically connected to the radiating part 93. Connected to the short-circuit point 121 of the ground plane 12; a feed-in metal part 95, which can be formed on the dielectric substrate 11 using printing or etching techniques, and is on the same surface as the radiation part 93, and has a feed-in point 952, which is The feed point 952 of the antenna, the feed point 952 is connected to a signal source 16, and there is a specific distance 951 between the feed metal part 95 and the radiation part 93, and the specific distance 951 can also be as wide as about 3mm. Embodiment 9 mainly uses a single feeding metal part 95 directly separated from the radiating part 93 by a specific distance 951 to achieve the effect of coupling excitation of the radiating part 93 . Example 9 can also obtain similar results to Example 1, which meets the usage requirements of mobile communication products.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, can use the method and technical content disclosed above to make some changes or modifications to equivalent embodiments with equivalent changes, but any content that does not depart from the technical solution of the present invention, Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (13)

1, a kind of antenna of coplanarity coupling type feed-in multi-frequency action communication device is characterized in that it comprises:

One medium substrate;

One ground plane is positioned on the surface of this medium substrate, has a short dot, and this short dot is positioned at an edge of this ground plane, and this edge also is positioned between the inner area of this medium substrate;

One Department of Radiation is positioned on the surface of this medium substrate, and this Department of Radiation is positioned near the edge of this ground plane, does not overlap mutually with this ground plane;

One short circuit metal part is positioned on the surface of this medium substrate, and with the same surface of this Department of Radiation, the one end is electrically connected to this Department of Radiation, the other end is electrically connected to the short dot of this ground plane; And

One feeding portion is positioned on the surface of this medium substrate, and with the same surface of this Department of Radiation, comprise:

One first feed-in metal part has a load point, is the load point of antenna, and this load point also is connected to a signal source;

One second feed-in metal part, the one end is connected to this Department of Radiation, this second feed-in metal part and and this first feed-in metal part between have a specific distance.

2, antenna of coplanarity coupling type feed-in multi-frequency action communication device according to claim 1 is characterized in that wherein said this medium substrate is the system circuit board of an action communication device.

3, antenna of coplanarity coupling type feed-in multi-frequency action communication device according to claim 1 is characterized in that wherein said this Department of Radiation comprises:

One first metal part has at least once bending;

One second metal part has at least once bending, and is connected to this first metal part.

4, antenna of coplanarity coupling type feed-in multi-frequency action communication device according to claim 1 is characterized in that wherein said this Department of Radiation and this short circuit metal part are to be made with a sheet metal punching press or cutting.

5, antenna of coplanarity coupling type feed-in multi-frequency action communication device according to claim 1 is characterized in that wherein said this Department of Radiation, this short circuit metal part and this feeding portion are to be formed on this medium substrate with printing or etching technique.

6, antenna of coplanarity coupling type feed-in multi-frequency action communication device according to claim 1 is characterized in that the specific distance between wherein said this second feed-in metal part and this first feed-in metal part is less than 3mm.

7, antenna of coplanarity coupling type feed-in multi-frequency action communication device according to claim 1 is characterized in that wherein said this Department of Radiation has at least once bending, makes that the partial section of this Department of Radiation is vertical with this ground plane.

8, a kind of antenna of coplanarity coupling type feed-in multi-frequency action communication device is characterized in that it comprises:

One medium substrate;

One ground plane is positioned on the surface of this medium substrate, has a short dot, and this short dot is positioned at an edge of this ground plane, and this edge also is positioned between the inner area of this medium substrate;

One Department of Radiation is positioned on the surface of this medium substrate, and this Department of Radiation is positioned near the edge of this ground plane, does not overlap mutually with this ground plane;

One short circuit metal part is positioned on the surface of this medium substrate, and with the same surface of this Department of Radiation, the one end is electrically connected to this Department of Radiation, the other end is electrically connected to the short dot of this ground plane; And

One feed-in metal part is positioned on the surface of this medium substrate, and with the same surface of this Department of Radiation, and has a load point, be the load point of antenna, this load point also is connected to a signal source, has a specific distance between this feed-in metal part and this Department of Radiation simultaneously.

9, antenna of coplanarity coupling type feed-in multi-frequency action communication device according to claim 8 is characterized in that wherein said this medium substrate is the system circuit board of an action communication device.

10, antenna of coplanarity coupling type feed-in multi-frequency action communication device according to claim 8 is characterized in that wherein said this Department of Radiation comprises:

One first metal part has at least once bending; And

One second metal part has at least once bending, and is connected to this first metal part.

11, antenna of coplanarity coupling type feed-in multi-frequency action communication device according to claim 8 is characterized in that wherein said this Department of Radiation and this short circuit metal part are to be made with a sheet metal punching press or cutting.

12, antenna of coplanarity coupling type feed-in multi-frequency action communication device according to claim 8 is characterized in that wherein said this Department of Radiation, this short circuit metal part and this feed-in metal part are to be formed on this medium substrate with printing or etching technique.

13, antenna of coplanarity coupling type feed-in multi-frequency action communication device according to claim 8 is characterized in that the specific distance between wherein said this feed-in metal part and this Department of Radiation is less than 3mm.

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