TWI451632B - High gain loop array antenna system and electronic device - Google Patents

Description

High gain loop array antenna system and electronic device

The present invention relates to an antenna system, and more particularly to a high gain loop array antenna system.

Since current wireless network products are mostly demanding in terms of lightness, shortness and convenience, how to design a small antenna that meets the needs of use has become one of the key technologies for wireless network products to effectively reduce the size; in particular, the design of small antennas is Wireless network products, such as the wireless network bridge (access point, AP) signal reception capability and quality have the most direct relationship, so that how to get the proper antenna performance under the limited space configuration of wireless network products Performance has always been the primary issue for related industries.

A conventional printed flat panel array antenna is often applied to an outdoor wireless network access point (AP) having a plurality of antenna elements and operating in a 5 GHz wireless network (WLAN) or It is a specification applied to 802.11a/n, such as the Republic of China Patent No. M357719, and the US Patent No. 7,675,466.

However, this type of planar array antenna is a half-wavelength resonant structure, so a large area is usually required for design. For example, a 2 x 2 planar array antenna operating in the 5 GHz band has an area of about 50 mm (mm) x 50 mm (mm), so that the wireless network bridge using the antenna requires a larger volume. . On the other hand, due to the large area of the planar array antenna, under the condition of limited space, the number of antenna elements is limited, resulting in poor antenna gain.

In addition, the conventional flat panel array antenna requires the ground plane of the system board as the ground plane of the antenna, so the panel array antenna must be placed on the surface of the system board, otherwise the antenna cannot be used normally. Therefore, the electronic components on the system board can only be placed on the other surface, and the space on the system board cannot be effectively utilized, so that the size of the wireless network bridge cannot be reduced.

Accordingly, it is an object of the present invention to provide a low-profile, low-profile, high-gain loop antenna system.

Another object of the present invention is to provide a high gain loop array antenna system with high directivity.

Therefore, the high gain loop array antenna system of the present invention comprises an antenna device and a system module. The antenna device includes a substrate, a feed network, and a plurality of first loop antennas. The substrate has a first surface and a second surface opposite the first surface. The feed network has a microstrip line disposed on the first surface and a ground conductor disposed on the second surface and opposite to the microstrip line. The microstrip line has a feed end for signal feeding and a plurality of electrical connection feeds. The first connection end of the input. The first loop antennas are equidistantly arranged corresponding to one side edge of the ground conductor, and have a first radiating portion connecting the first connecting end and located on the first surface, and a connecting first radiating portion and the grounding conductor and located at the first The second radiating portion of the two surfaces, and the first radiating portion is connected to the second radiating portion to form a loop. The system module is spaced apart from the substrate and faces the second surface to reflect the radiation of the first loop antenna.

Preferably, the first connection ends of the microstrip line are opposite to the side edge of the ground conductor.

Preferably, the first radiating portion has a first radiating section connected to the first connecting end and spaced apart from the vertical projection position of the second radiating portion, and a connecting the first radiating section and the second radiating part. And a second radiant section in a loop shape.

Preferably, the microstrip line further has a plurality of second connecting ends electrically connected to the feeding end, the antenna device further comprising a plurality of opposite side edges of the corresponding grounding conductors arranged equidistantly and symmetrically to the first loop a second loop antenna of the antenna, the second loop antenna having a third radiating portion connected to the second connecting end and located on the first surface, and a connecting the third radiating portion and the ground conductor and located at the first a fourth radiating portion of the two surfaces, and the third radiating portion is connected to the fourth radiating portion to form a loop.

Preferably, the second connection ends of the microstrip line are opposite to the other side edge of the ground conductor.

Preferably, the third radiating portion has a third radiating portion connected to the second connecting end and spaced apart from the vertical projection position of the fourth radiating portion, and a third radiating portion and the fourth radiating portion are connected And a fourth radiant section in a loop shape.

Preferably, the system module is a system circuit board having a ground plane facing the second surface and spaced parallel to the substrate. The system module can be used as a reflector to reflect the radiation of the first loop antenna.

Preferably, the antenna device further includes a signal transmission line having a signal feeding section extending from the second surface to the first surface and connected to the feeding end of the microstrip line.

Preferably, the first loop antennas and the second loop antennas operate in the 5 GHz band.

One of the effects of the present invention is that the feed antenna is electrically connected to the loop antennas, and the performance of the antenna is improved by increasing the number of loop antennas.

The second effect of the present invention is that the antenna device has a smaller size design by the folded loop antenna structure of the antenna device and the design of the feed network. Moreover, by setting the system module, the antenna system obtains better radiation efficiency and antenna gain, and the antenna system has high directivity and can be applied to an outdoor wireless network bridge.

Another object of the present invention is to provide an electronic device having the above-described high gain loop array antenna system, the electronic device comprising a housing and a system module and an antenna device disposed in the housing.

The housing has a bottom plate and a cover covering the bottom plate.

The system module is disposed on the bottom plate and has a grounding surface facing away from the bottom plate.

The antenna device includes a substrate, a feed network, and a plurality of first loop antennas. The substrate is disposed above the system module and has a first surface and a second surface opposite to the first surface and facing the ground plane of the system module; the feed network has a first surface disposed at the first surface a surface microstrip line and a grounding conductor disposed on the second surface and opposite to the microstrip line, the microstrip line having a feed end for signal feed and a plurality of first electrically connected to the feed end The first loop antennas are arranged equidistantly corresponding to one side edge of the ground conductor, and have a first radiating portion connected to the first connecting end and located on the first surface, and a connecting portion a radiating portion and the grounding conductor are located at the second radiating portion of the second surface, and the first radiating portion is connected to the second radiating portion to form a loop.

The effect of the invention is that the substrate area is less than or equal to the area of the system module, ensuring that the system module can completely reflect the radiation of each of the first loop antennas, and the substrate and the system module can be coated on the electrons. The inside of the housing of the device.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of FIG.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1, a first preferred embodiment of a high gain loop array antenna system of the present invention is shown. The high gain loop array antenna system 1 is suitable for an outdoor wireless network access point (AP). The high gain loop array antenna system 1 includes an antenna device 2 and a system module 3 disposed in parallel with the antenna device 2. The system module 3 of the embodiment is a system circuit board having at least one ground layer and a circuit. Components and the like, and their effects will be described later.

The antenna device 2 includes a substrate 21, a feed network 22, a plurality of first loop antennas 23, a plurality of second loop antennas 24, and a signal transmission line 25. In this embodiment, the antenna device 2 includes two first loop antennas 23 and two second loop antennas 24 to form a loop array antenna. The substrate 21 has a body 211 which is an insulating material (for example, glass fiber, FR4) and a first surface 212 and a second surface 213 on the opposite side of the body 211. The loop antenna of this embodiment is a folded-loop antenna, and the first loop antenna 23 and the second loop antenna 24 form a 2×2 array structure. It should be noted that the present invention can be designed for a printed circuit board antenna, using a folded loop array antenna instead of a conventional patch antenna array. The first loop antenna 23 and the second loop antenna 24 are one-wavelength loops, and the antenna has a balanced structure and has high gain radiation field characteristics. In addition, the folded loop antenna of the present invention can effectively reduce the overall array antenna area while maintaining the radiation characteristics of the panel antenna, compared to the conventional flat panel antenna design.

Referring to FIG. 2 and FIG. 3, a feed network 22 is a power distribution network for transmitting signals between a signal transmission source and a loop array antenna for transmitting and controlling the loop antennas 23 . 24, the amplitude and phase of the feed signal. The feed network 22 has a micro-strip line 221 disposed on the first surface 212 and a ground conductor 222 disposed on the second surface 213 and opposite to the microstrip line 221, wherein the ground conductor 222 The body 211 of the substrate 21 extends horizontally laterally to the other side on a side of the center line. The microstrip line 221 has a central section 261, two mating sections 262 respectively connected to the ends of the central section 261 and having an inverted T shape, and a feeding end 263 disposed in the middle of the central section 261 for signal feeding ( It is located at the geometric center point of the feed network, and the two ends of each of the mating segments 262 are a first connection end 264 and a second connection end 265, and it can be seen from FIG. 2 that the feed end 263 transmits the signal. To the first connection end 264 and the second connection end 265. In the present embodiment, the central segment 261 is a microstrip line having a narrow line width, and its impedance is 100 Ω, and the mating segment 262 is a microstrip line having a wide line width, and the impedance thereof is 50 Ω, but the present invention does not To be limited, it can also be adjusted in accordance with the operating frequency bands of the loop antennas 23 and 24. The first connection end 264 is connected to the first loop antenna 23 and is located at one side edge 223 of the ground conductor 222; the second connection end 265 is connected to the second loop antenna 24, and the pair is located at the other side edge 224 of the ground conductor 222. .

Referring to Figures 2 and 4, the first loop antennas 23 are equally spaced along the side edges 223 of the ground conductor 222. The first loop antenna 23 has a first radiating portion 231 connected to the first connecting end 264 and located on the first surface 212, and a second radiating portion 232 connecting the first radiating portion 231 and the ground conductor 222 and located on the second surface 213. The first radiating portion 231 and the second radiating portion 232 are connected to a through hole (not shown) of the substrate 21 to form a loop. The first radiating portion 231 has a first radiating section 233 connected to the first connecting end 264 and spaced apart from the vertical projection position of the second radiating portion 232, and a connecting first radiating section 233 and second radiating section 232 and returning a second radiant section 234 in the shape of a circle. In this embodiment, the length of the first loop antenna 23 corresponds to the wavelength of the 5 GHz band, so the first loop antenna 23 operates in the 5 GHz band and is a full-wavelength loop antenna, but the frequency band operated by the first loop antenna 23 It is not limited to the examples in this embodiment.

Referring to FIG. 2 and FIG. 5 , the second loop antennas 24 are equally spaced along the side edges 224 of the ground conductor 222 and are symmetric with the ground conductor 222 as the first loop antenna 23 , and the second loop antenna 24 . a third radiating portion 241 having a second connecting end 265 connected to the first surface 212 and a fourth radiating portion 242 connecting the third radiating portion 241 and the grounding conductor 222 and located on the second surface 213, wherein the third radiating portion The 241 and the fourth radiating portion 242 are connected to a through hole (not shown) of the substrate 21 to form a loop. The third radiating portion 242 has a third radiating section 243 connected to the second connecting end 265 and spaced apart from the vertical projection position of the fourth radiating portion 242, and a connecting third radiating section 243 and the fourth radiating section 242 and returning a circular fourth radiating section 244. In this embodiment, the length of the second loop antenna 24 corresponds to the wavelength of the 5 GHz band, so the second loop antenna 24 operates in the 5 GHz band and is a full-wavelength loop antenna, but the frequency band operated by the second loop antenna 24 It is not limited to the examples in this embodiment. As shown in FIG. 1 , the signal transmission line 25 is disposed on the second surface 213 of the substrate 21 and connected to a signal transmission source (not shown) of the antenna system 1 . The signal transmission line 25 has a second surface 213 extending to the first surface. 212 and connected to the signal feeding section 251 of the feeding end 263 of the microstrip line 221. By arranging the signal transmission line 25 on the second surface 213, the influence of the signal transmission line 25 on the loop antennas 23, 24 can be reduced.

Referring to FIG. 6, a schematic diagram of actual dimensions of the antenna device 2 of the present embodiment is shown. As can be seen from Fig. 6, the size of the loop antennas 23, 24 of the antenna device 2 is about 27 mm (mm) x 45 mm (mm). Therefore, the antenna device 2 can reduce the volume and save a lot of space compared to the conventional 2×2 flat panel array antenna operating in the same frequency band. It should be noted that there is a spacing (S) between the two first loop antennas 23 and the two second loop antennas 24, and since the first loop antenna 23 and the second loop antenna 24 of the present embodiment operate in the 5 GHz band, Therefore, the pitch (S) is designed to be between 0.5λ (wavelength) and 1λ, and a better radiation gain can be obtained.

The present invention connects and feeds a plurality of loop antennas by the circuit design of the feed network 22, and causes the echo and phase of each receive loop antenna to be the same as the phase of the transmit signal, so that the signal Energy can be effectively radiated out. The loop antenna of the present invention has a simple structure, is completed by using a printed circuit board, and has low manufacturing cost. In the same wireless network bridge device, more loop array antennas can be added than the conventional flat panel array antenna.

Referring to FIG. 1, the system module 3 has a ground plane 31 (eg, a metal surface) facing the second surface 213 of the substrate 21. The ground plane 31 can reflect the radiation of the antenna device 2 from the second surface 213 toward the ground plane 31. And radiating outward from the first surface 212, thereby not only making the antenna device 2 highly directional, but also improving the antenna gain (positive x-axis direction) of the antenna device 2 in a single direction. Further, there is a gap (g) between the reflecting surface 31 and the second surface 213, and the gap (g) of the present embodiment obtains a better antenna gain at 5.4 mm. In addition, the gap (g) can be utilized as an effective space for electronic components on the system board.

Moreover, compared with the conventional flat panel array antenna, the loop array antenna of the present invention does not need the ground plane of the system board as the ground plane of the antenna, and can be operated normally separately. The ground plane of the system board in the present invention is a reflector of the antenna, which can change the bi-directional radiation of the full-wavelength loop antenna without the system board design into a high-pointing The directional radiation of the antenna greatly increases the antenna gain by about 2.5 dBi.

In addition, the area of the substrate 21 is less than or equal to the area of the system module 3 to ensure that the system module 3 can completely reflect the radiation of each of the first loop antenna 23 and the second loop antenna 24, and the substrate 21 is The system module 3 can be wrapped inside the housing 70 of a miniaturized wireless communication device 7 as shown in FIG. 7, and is an antenna solution that can integrate the system board into a single built-in bridge. The housing 70 includes a bottom plate 71 and a cover 72 covering the bottom plate 71. The system module 3 is disposed on the bottom plate 71, and the substrate 21 of the antenna device 2 is disposed above the system module 3 at intervals.

Referring to FIG. 8 and FIG. 9, the measurement results of the antenna gain and the radiation efficiency of the high gain loop array antenna system 1 of the present embodiment are shown. It can be seen from Fig. 8 that the frequency operation is between 4870MHz and 5860MHz, and the return loss is less than 14dB, that is, the voltage wave ratio in this frequency interval is less than 1.5, in order to meet the requirements of the antenna radiation efficiency. Furthermore, as can be seen from FIG. 9, the antenna gain of the antenna system 1 is higher than 9.5 dBi, and the radiation efficiency is higher than 65%, so the 5 GHz band provided by the antenna system 1 can be applied to a wireless network bridge (AP).

As shown in FIG. 8, the 14-dB return loss impedance bandwidth of the first embodiment of the present invention is about 990 MHz, covering a 5-GHz wireless local area network operating band, which is very suitable for wireless network bridging applied outdoors. On the device.

Referring to FIG. 10, a measurement result of the 2-D radiation pattern measurement of the antenna system 1 operating at 5150 MHz is shown. Referring to FIG. 11, a graph of the 2-D radiation pattern measurement results of the antenna system 1 operating at 5490 MHz is shown. Referring to FIG. 12, it is a graph of the 2-D radiation field type measurement result of the antenna system 1 operating at 5825 MHz. 10 to 12, the antenna system 1 has a high antenna gain in the positive x-axis direction by the mutual cooperation of the antenna device 2 and the system module 3, that is, the antenna system 1 has high directivity. Suitable for wireless network bridges (APs).

Referring to Figure 13, another variation of the preferred embodiment is illustrated. The difference is that the feed end 263 is not disposed in the middle of the center segment 261, but is biased to one side of the center segment 261. This design can make the radiation direction of the antenna system 1 slightly offset and be applied to different environments, but The antenna gain and radiation efficiency of the antenna system 1 are not affected.

Referring to Figures 14 and 15, a second preferred embodiment of the high gain loop array antenna system of the present invention is shown. The high gain loop array antenna system 4 includes an antenna device 5 and a system module 6 disposed in parallel with the antenna device 5. The system module 6 is configured and functions as the system module 3 of the first preferred embodiment. Therefore, do not add more details. The difference between the antenna system 4 and the antenna system 1 of the first preferred embodiment is that the antenna device 5 of the antenna system 4 has a plurality of loop antennas 23, 24.

The antenna device 5 includes a substrate 51, a feed network 52, a plurality of first loop antennas 23, a plurality of second loop antennas 24, and a signal transmission line 25, wherein the loop antennas 23, 24 and the signal transmission lines 25 is the same as the first preferred embodiment, so it will not be described again. The substrate 51 has a body 511 and a first surface 512 and a second surface 513 on opposite sides of the body 511.

As shown in FIG. 14, the feed network 52 has a microstrip line 521 disposed on the first surface 512 and a ground conductor 522 disposed on the second surface 513 and opposite to the microstrip line 521. The grounding conductor 522 is horizontally extended laterally to the other side by the body 511 of the substrate 51 on a side of the center line. The microstrip line 521 has a first central section 561, two first connecting sections 562 connected to both ends of the first central section 561 and having a cross shape. The two are respectively connected to the first matching section 562 and extend in the first central section 561. A second central section 563 on the straight line, and a second mating section 564 that connects the second central section 563 and is inverted T-shaped. Moreover, the microstrip line 521 further has a feed end 565 located in the middle of the first center section 561 and connected to the signal transmission line 25, and a plurality of first ends disposed at the longitudinal ends of the first mating section 562 and the second mating section 564. The connecting end 566 and the second connecting end 567 are connected, and the feeding end 565 is electrically connected to each of the first connecting end 566 and the second connecting end 567. Furthermore, each of the first connecting ends 566 is connected to each of the first loop antennas 23, and the first connecting ends 566 are opposite to the one side edge 523 of the grounding conductor 522; the second connecting ends 567 are connected to the second loop antenna. 24, and the second connection ends 567 are opposite to the other side edge 524 of the ground conductor 522. Therefore, the first loop antennas 23 and the second loop antennas 24 are symmetrical to each other.

As can be seen from the present embodiment, the number of loop antennas 23, 24 can be increased by the design of the feed network 52, and thereby the antenna gain of the antenna device 5 is increased. The other structures and functions of the antenna device 5 are the same as those of the antenna device 2 of the first preferred embodiment, and therefore will not be further described herein.

Referring to Figures 16 and 17, a third preferred embodiment of the high gain loop array antenna system of the present invention is shown. The high gain loop array antenna system 7 includes an antenna device 8 and a system module 9 disposed in parallel with the antenna device 8. The system module 9 is constructed and functions as the system module 3 of the first preferred embodiment. Therefore, do not add more details. The antenna system 7 differs from the antenna system 1 of the first preferred embodiment in that the antenna device 8 of the antenna system 7 is provided with only the first loop antenna 23.

The antenna device 8 includes a substrate 81, a feed network 82, a plurality of first loop antennas 23, and a signal transmission line (not shown). The first loop antenna 23 and the signal transmission line are the same as the first preferred embodiment. For example, it is not necessary to add more details. The substrate 81 has a body 811 and a first surface 812 and a second surface 813 on opposite sides of the body 811.

As shown in FIG. 16, the feed network 82 has a microstrip line 821 disposed on the first surface 812 and a ground conductor 822 disposed on the second surface 813 and opposite the microstrip line 821. The ground conductor 822 is horizontally extended laterally to the other side by one side of the body 811 of the substrate 81. The microstrip line 821 has a central section 861, a feed end 862 disposed on a side of the central section 861 and connected to a signal transmission line (not shown), and a connection end 863 disposed at a plurality of intervals on the central section 861. The first loop antennas 23 are respectively connected to the connection end 863, and the other descriptions of the first loop antenna 23 are the same as those of the first preferred embodiment, and therefore no further description is provided. In summary, the antenna devices 2, 5, 8 can be of a smaller size design by the design of the loop antennas 23, 24 of the antenna devices 2, 5, 8 and the feed networks 22, 52, 82. Moreover, by the arrangement of the system modules 3, 6, and 9, the antenna systems 1, 4, and 7 obtain better radiation efficiency and antenna gain, and the antenna systems 1, 4, and 7 have high directivity and can be applied outdoors. The wireless network bridge is indeed capable of achieving the object of the present invention.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

1. . . Antenna system

2. . . Antenna device

twenty one. . . Substrate

211. . . Ontology

212. . . First surface

213. . . Second surface

twenty two. . . Feed into the network

221. . . Microstrip line

222. . . Grounding conductor

223. . . Side edge

224. . . Side edge

261. . . Central segment

262. . . Mating segment

263. . . Feed end

264. . . First connection

265. . . Second connection

twenty three. . . First loop antenna

231. . . First radiation department

232. . . Second radiation department

233. . . First radiant section

234. . . Second radiant section

twenty four. . . Second loop antenna

241. . . Third radiation department

242. . . Fourth radiation department

243. . . Third radiant section

244. . . Fourth radiant section

25. . . Signal transmission line

251. . . Signal feed segment

3. . . System module

31. . . Ground plane

4. . . Antenna system

5. . . Antenna device

51. . . Substrate

511. . . Ontology

512. . . First surface

513. . . Second surface

52. . . Feed into the network

521. . . Microstrip line

522. . . Grounding conductor

523. . . Side edge

524. . . Side edge

561. . . First central segment

562. . . First mating segment

563. . . Second central segment

564. . . Second mating segment

565. . . Feed end

566. . . First connection

567. . . Second connection

6. . . System module

7. . . Antenna system

8. . . Antenna device

81. . . Substrate

811. . . Ontology

812. . . First surface

813. . . Second surface

82. . . Feed into the network

821. . . Microstrip line

822. . . Grounding conductor

861. . . Central segment

862. . . Feed end

863. . . Connection end

9. . . System module

S. . . spacing

g. . . gap

1 is a perspective view showing a first preferred embodiment of the high gain loop array antenna system of the present invention;

Figure 2 is a plan view showing the antenna device of the antenna system;

Figure 3 is a plan view schematically showing the antenna device in another direction;

Figure 4 is a schematic view showing the first loop antenna of the antenna device;

Figure 5 is a schematic view showing the second loop antenna of the antenna device;

Figure 6 is a schematic view showing the dimensions of the components of the antenna device;

Figure 7 is a schematic view showing the antenna system in a housing of an electronic device;

Figure 8 is a measurement result diagram illustrating the return loss of the antenna system;

Figure 9 is a measurement result diagram illustrating the antenna gain and radiation efficiency of the antenna system;

Figure 10 is a 2-D radiation field type measurement result, illustrating that the antenna system operates at 5150 MHz;

Figure 11 is a 2-D radiation field type measurement result, illustrating that the antenna system operates at 5490 MHz;

Figure 12 is a 2-D radiation field type measurement result, illustrating that the antenna system operates at 5825 MHz;

Figure 13 is a plan view showing the position of the feeding end of the antenna device is different;

Figure 14 is a plan view showing a second preferred embodiment of the high gain loop array antenna system of the present invention

Figure 15 is a perspective view showing the antenna system;

Figure 16 is a plan view showing a third preferred embodiment of the high gain loop array antenna system of the present invention; and

Figure 17 is a perspective view showing the antenna system.

1. . . Antenna system

2. . . Antenna device

3. . . System module

twenty one. . . Substrate

211. . . Ontology

212. . . First surface

213. . . Second surface

twenty two. . . Feed into the network

twenty three. . . First loop antenna

twenty four. . . Second loop antenna

25. . . Signal transmission line

31. . . Ground plane

251. . . Signal feed segment

g. . . gap

Claims (11)

A high gain loop array antenna system comprising: an antenna device comprising: a substrate having a first surface and a second surface opposite to the first surface; a feed network having a first a surface microstrip line and a ground conductor disposed on the second surface and opposite to the microstrip line, the microstrip line having a feed end for signal feed and a plurality of first electrically connected to the feed end a connection end, and the microstrip line is not electrically coupled to the ground conductor; the plurality of first loop antennas are equidistantly arranged corresponding to one side edge of the ground conductor, and have a connection to the first connection end and are located a first radiating portion of the first surface and a second radiating portion connecting the first radiating portion and the grounding conductor and located at the second surface, and the first radiating portion is connected to the second radiating portion to form a loop; And a system module having a ground plane facing the second surface and spaced parallel to the substrate for reflecting radiation of the first loop antennas. The high gain loop array antenna system of claim 1, wherein the first connection ends of the microstrip line are opposite to the side edges of the ground conductor. The high gain loop array antenna system according to claim 1, wherein the first radiating portion has a first portion connected to the first connecting end and spaced apart from a vertical projection position of the second radiating portion. Radiation section And a second radiant section connected to the first radiant section and the second radiant portion and having a loop shape. The high-gain loop antenna system according to any one of claims 1 to 3, wherein the microstrip line further has a plurality of second terminals electrically connected to the feed end, the antenna device further The second loop antenna includes a plurality of second loop antennas that are spaced apart from each other and are symmetric with respect to the first loop antenna. The second loop antennas have a second connection end and are located at the second loop antenna. a third radiating portion of a surface and a fourth radiating portion connecting the third radiating portion and the grounding conductor and located at the second surface, and the connected third radiating portion and the fourth radiating portion form a loop. The high gain loop array antenna system of claim 4, wherein the second connection ends of the microstrip line are opposite the other side edge of the ground conductor. The high gain loop array antenna system according to claim 4, wherein the third radiating portion has a third portion connected to the second connecting end and spaced apart from the vertical projection position of the fourth radiating portion. a radiating section and a fourth radiating section connected to the third radiating section and the fourth radiating portion and in a loop shape. The high gain loop array antenna system of claim 1, wherein the substrate area is less than or equal to the system module area. The high-gain loop antenna system of claim 1, wherein the antenna device further includes a signal transmission line, the signal transmission line having a second surface extending to the first surface and connecting the micro The signal feed section with the feed of the line. The high gain loop array antenna system of claim 4, wherein the first loop antennas and the second loop antennas are full-wavelength loop antennas operating in the 5 GHz band. An electronic device with a high gain loop array antenna system, comprising: a housing having a bottom plate and a cover covering the bottom plate; a system module disposed on the bottom plate and having a back surface And a grounding device; and an antenna device, comprising: a substrate disposed above the system module, and having a first surface and a second surface opposite to the first surface and facing the ground plane of the system module; a feed network having a microstrip line disposed on the first surface and a ground conductor disposed on the second surface and opposite to the microstrip line, the microstrip line having a signal feed The input end and the plurality of first connection ends electrically connected to the feed end, and the microstrip line is not electrically coupled to the ground conductor; and the plurality of first loop antennas are equidistant from one side edge corresponding to the ground conductor Arranging and having a first radiating portion connected to the first connecting end and located on the first surface, and a second radiating portion connecting the first radiating portion and the grounding conductor and located on the second surface, and the second radiating portion a radiating portion and the second radiating portion Even the formation of loops. An electronic device having a high gain loop array antenna system according to claim 10, wherein the microstrip line further has a plurality of electrical connections Connected to the second connection end of the feed end, the antenna device further includes a plurality of second loop antennas corresponding to the other side edges of the ground conductor and symmetrically arranged to the first loop antenna, the second loop The loop antenna has a third radiating portion connected to the second connecting end and located on the first surface, and a fourth radiating portion connecting the third radiating portion and the grounding conductor and located on the second surface, and the connected portion The third radiating portion forms a loop with the fourth radiating portion.