TWI764692B - Antenna module and wireless access point - Google Patents

Abstract

An antenna module includes a shared radiator and two asymmetric coplanar strip (ACS) feedlines being respectively adjacent to one side and the other side of the shared radiator, and the one side and the other side are orthogonal to each other such that the antenna module has an increased coverage area.

Description

Antenna modules and wireless access points

The present invention relates to an antenna module and a wireless access point, in particular to an antenna module having a shared radiator, a first port, a second port and two asymmetric coplanar strip (ACS) feed lines An antenna module and a wireless access point including the antenna module.

The need for broadband has prompted academia and industry to develop transceivers in the millimeter-wave (mmWave) band. In order to improve transceiver quality, 5G millimeter wave (mmWave 5G) antenna design is one of the important topics. At present, the main challenges of 5G mmWave transmission are high path loss and penetration loss. To compensate for these losses, mmWave 5G antennas must have high-gain characteristics for outdoor wireless base stations, and moderate gain, small physical size, and wide-angle coverage for indoor wireless access points. Therefore, orthogonal field-type diversity antennas have been paid more and more attention.

Compared to traditional coplanar waveguide (CPW) antennas, asymmetric coplanar stripline (ACS) feed antennas, consisting of a feed line with a single asymmetric ground plane, can significantly reduce the area.

In the prior art, asymmetric coplanar stripline feed antennas have been designed at 5G mmWave frequencies, with two feed ports to share radiation The implementation of Shared Radiator technology can reduce the physical size of the antenna. Although several antenna designs with shared radiator structures have been proposed in the world, these designs all work at low frequencies, have relatively large volumes, and are input through traditional feeding methods (such as microstrip lines) technology. energy. One of the designs also lacked independently steerable beams. There are also two designs that use a shared aperture instead of a shared radiator in the 5G mmWave band. However, the conventional feeding technology and shared aperture technology are used in the above-mentioned designs, which are quite unsuitable for 5G mmWave wireless access points because they greatly increase the volume of the antenna module. How to overcome the relatively large volume defect of the above-mentioned antenna module is a question worth pondering.

For this reason, in view of the lack of prior art, the inventor thought about the idea of improving the invention, and finally came up with the "antenna module and wireless access point" in this case.

The main purpose of the present invention is to provide a dual-port orthogonal field diversity antenna module developed by combining asymmetric coplanar stripline feeding technology and shared radiator technology. The antenna module has a shared radiator, A first port, a second port and two ACS feed lines have relatively small volume, high gain and orthogonal field diversity characteristics, which can be used to compensate for the high loss of millimeter waves and improve the coverage of the antenna module. Therefore, the antenna module has advantages in the application of millimeter wave wireless access point.

Another main purpose of the present application is to provide an antenna module, comprising a shared radiator, having a first edge and a second edge, a first port, a second port, a first ACS feed line fed from the first port and connected to the first edge, and a second ACS feed line fed from the second port, and connected to the second edge, wherein the first edge and the second edge are orthogonal.

The next main purpose of the present application is to provide a wireless access point, comprising a body having a first horizontal direction, and an antenna module as described above, disposed in the body and having a second horizontal direction, wherein the There is a first inclination angle between the second and the first horizontal direction.

Another main purpose of this application is to provide an antenna module, which includes a shared radiator and two ACS feed lines, respectively adjacent to one side and the other side of the shared radiator, and the one side and the other side are respectively They are orthogonal, so that the antenna module has an increased coverage.

1: The antenna module of this case

11: Shared Radiators

111: First Edge

112: Second Edge

113: Ladder-like structure

1131: Third Edge/Step Edge

12: The first port

13: Second port

14: The first asymmetric coplanar stripline (ACS) feed line/ACS feed line

141: The first metal trace

142: The first vertical corrugated structure

143: First Asymmetric Ground Plane

144: First Void

15: Second ACS feed line/ACS feed line

151: Second metal trace

152: Second Vertical Corrugated Structure

153: Second asymmetric ground plane

154: Second void

2: The wireless access point in this case

21: Ontology

3: circuit board/substrate

4: The first antenna module of this case

5: The second antenna module of this case

Figure 1: It is a schematic diagram showing an antenna module according to a preferred embodiment of the present invention and its dimensions.

Figure 2: It is a schematic diagram showing an antenna module and its detailed structure according to a preferred embodiment of the concept of the present invention.

Figure 3: It is a waveform diagram showing the S-parameters of an antenna module according to a preferred embodiment of the present invention.

Figure 4: It is a waveform diagram showing the input reflection coefficient versus frequency for the impedance bandwidth of the antenna module according to the preferred embodiment of the concept of the present invention irrespective of the substrate thickness.

Fig. 5: It is a waveform diagram showing the isolation of the antenna module according to the preferred embodiment of the present invention, which is impacted by the vertical corrugated structure versus frequency.

Figure 6: It is a waveform diagram showing the gain and total benefit versus frequency of an antenna module according to a preferred embodiment of the concept of the present invention.

Seventh Figures (A) and (B): It shows an antenna module according to a preferred embodiment of the concept of the present invention at 28GHz, respectively, fed from the first port and the second port to generate the same pole on the XY plane polarization and cross-polarized radiation patterns.

Seventh Figures (C) and (D): It shows an antenna module according to a preferred embodiment of the concept of the present invention at 31GHz respectively fed from the first port and the second port to generate the same pole on the XY plane polarization and cross-polarized radiation patterns.

Figure 8 (A) and (B): It shows the same pole on the YZ plane generated by the first port and the second port respectively feeding the antenna module according to the preferred embodiment of the present invention at 28GHz polarization and cross-polarized radiation patterns.

Figure 8 (C) and (D): It shows the same pole on the YZ plane generated by the first port and the second port respectively feeding the antenna module according to the preferred embodiment of the present invention at 31GHz polarization and cross-polarized radiation patterns.

The ninth figure (A): it shows that an antenna module according to a preferred embodiment of the present invention is arranged in a wireless access point, so that the whole room can be Schematic diagram covered by the antenna module.

The ninth figure (B): it shows that an antenna module according to a preferred embodiment of the present invention is arranged in a wireless access point, so that there is an inclination angle between the two, which can improve the coverage of the antenna module Schematic diagram of the rate.

The ninth figure (C): it shows that two antenna modules according to the preferred embodiment of the present invention are arranged in a wireless access point, so that the two antenna modules and the wireless access point are both A schematic diagram of a tilt angle to improve the coverage of the two antenna modules.

In order to improve the defect of the large volume of the antenna module in the prior art, an asymmetric coplanar strip (ACS) feeding technology is introduced in this case, so that the antenna module can reach a relatively small size, and at the same time Using the shared radiator technology in a relatively small size, by integrating the above two technologies, the antenna module 1 of the present application (refer to the first and second figures) is developed, which is a dual-port orthogonal field diversity antenna module. Group, the antenna module 1 has the characteristics of high gain and orthogonal field type diversity, which can be used to compensate the high loss of millimeter wave and improve the coverage of the antenna module. Therefore, the antenna module 1 has the advantages of millimeter wave wireless access point application Advantage.

The first figure is a schematic diagram showing an antenna module and its dimensions according to a preferred embodiment of the concept of the present invention. In the first figure, the antenna module 1 has a shared radiator 11, a first port 12, a second port 13, a first asymmetric coplanar stripline (ACS) feed line 14 and a second ACS feed line 15. According to the preferred embodiment of the present invention, the antenna module 1 The relevant dimensions are shown in the first image. The antenna module 1 is disposed on a circuit board 3, and the circuit board 3 is a substrate.

The second figure is a schematic diagram showing an antenna module and its detailed structure according to a preferred embodiment of the present invention. In the second figure, the antenna module 1 has a shared radiator 11 , a first port 12 , a second port 13 , a first ACS feed line 14 and a second ACS feed line 15 , wherein the shared radiator 11 has a first edge 111, a second edge 112 and a stepped/ladder like structure 113 with a third edge 1131; the first ACS feed line 14 has a first metal trace 141, a first vertical corrugated structure 142, a first asymmetric ground plane 143 and a first gap 144; and the second ACS feed line 15 has a second metal trace 151, a second vertical corrugated structure 152, a first Two asymmetric ground planes 153 and a second gap 154 . As shown in the first figure, the antenna module 1 is disposed on a circuit board 3, and the circuit board 3 is a substrate.

As shown in Figures 1 and 2, the present application proposes the antenna module 1 of the wireless access point 2 of the present application (see Figure 9 (A) to (C)) operating in 5G millimeter wave (mmWave 5G) . The antenna module 1 is composed of a shared radiator 11 and two asymmetric coplanar strip (ACS) feed lines (14 and 15). The antenna module 1 is designed on an ultra-thin PCB substrate 3 with a thickness of 5 mil (0.127 mm). The ultra-thin substrate 3 is inherently flexible and easy to integrate into the access point 2 operating in mmWave 5G. Compared with the traditional CPW feeding technology, the ACS feeding technology reduces the area of the common ground, which greatly reduces the total area of the antenna. At the same time, the two feeding ends (the first port 12 and the second port 13) are designed to be orthogonal Excite the shared radiator 11 for better angular coverage. Therefore, the antenna module 1 only needs a total area of about 44.5 mm ² . Compared with the shared aperture and the shared radiator, the antenna module 1 has advantages in both area and volume.

As shown in the second figure, the antenna module 1 is designed on the PCB circuit board 3, and the antenna module 1 includes a shared radiator 11, which can minimize the total area without changing the characteristics of the antenna . The shared radiator 11 includes a stepped structure 113 to increase the impedance bandwidth. Each feed end (the first port 12 or the second port 13) is fed by an ACS feed line (14 or 15), and each of the ACS feed lines (14 or 15) is fed by a metal wire (141 or 151) and A vertical corrugated structure (142 or 152) is formed with an asymmetric ground plane (143 or 153). Each of the feed lines (14 or 15) can be adjusted by adjusting the gap (144 or 154) between the metal trace (141 or 151) and the vertical corrugated structure (142 or 152) and the asymmetric ground plane (143 or 153). to obtain a characteristic impedance of 50Ω. However, unlike the common CPW-fed antenna that generates a symmetrical beam in end-fire, the antenna module 1 fed by ACS in this case tends to tilt the beam due to the asymmetric ground plane (143 or 153). . In order to offset the beam tilt, a stepped structure 113 is designed at the shared radiator 11 in this case, which offsets the beam tilt and has the effect of increasing the bandwidth. At the same time, for the antenna module 1 operating in 5G millimeter waves fed by the ACS feed line, the shared radiator 11 needs to meet the directivity requirements and impedance matching; however, the antenna module 1 does not need an additional impedance matching network, Therefore, the antenna module 1 proposed in this case has great advantages in area.

Figure 3 is a waveform diagram showing the S-parameters of an antenna module according to a preferred embodiment of the present invention. In the third graph, the vertical axis is the dB measure and the horizontal axis is the frequency (GHz). S12 represents transfer from the second port 13 to the first The power of port 12, S21 represents the power transferred from the first port 12 to the second port 13, S11 is the input reflection coefficient of the first port 12, and S22 is the input reflection coefficient of the second port 13. Due to the symmetry of the two ACS feed lines 14 and 15 fed through the first port 12 and the second port 13 , the S-parameters of the two ACS feed lines 14 and 15 are the same. That is, S12 is the same as S21, and S11 is the same as S22. The antenna module 1 is suitable for a 5G millimeter wave frequency band from 25GHz to 31GHz.

FIG. 4 is a waveform diagram showing the input reflection coefficient versus frequency of the impedance bandwidth independent of the substrate thickness of an antenna module according to a preferred embodiment of the concept of the present invention. As shown in Figure 4, because the impedance bandwidth of the antenna module 1 including two orthogonal ACS feed lines (14 or 15) proposed in this case has nothing to do with the thickness of the substrate; therefore, when the thickness of the circuit board is 0.127 mm, 0.254mm or 0.508mm, the antenna characteristics (input reflection coefficient) do not change significantly by changing the thickness of the circuit board (ie substrate).

FIG. 5 is a waveform diagram showing the isolation of the antenna module under the impact of the vertical corrugated structure with respect to frequency according to a preferred embodiment of the present invention. The impact of the vertical corrugated structure (142 or 152) on the isolation between the two ACS feed lines (14 or 15) is shown in the fifth figure. As shown in the fifth figure, when incorporating the vertical corrugated structure (142 or 152), the isolation increases by almost 4dB.

Table I

Table 1 compares the antenna performance characteristics with and without vertical corrugated structures 142 and 152 inserted in the asymmetric ground planes 143 and 153, which direct the electric field to the aperture direction, which means that the electric field passes through the asymmetric ground plane 143 and 153 , suppressing leakage waves to improve the isolation between the first port 12 and the second port 13 .

FIG. 6 is a waveform diagram showing gain and total benefit versus frequency of an antenna module according to a preferred embodiment of the concept of the present invention. As shown in Figure 6, the antenna module 1 obtained a gain peak value of about 7.2dBi in the available frequency band of the antenna, resulting in high gain and high beam integrity over the entire operating frequency band, with an average efficiency of about 80%, while The 1-dB gain bandwidth is also high. Therefore, the antenna module 1 has high directivity in the entire working frequency band.

Figure 7 (A) and (B) show the co-polarization sum on the XY plane generated by feeding the first port and the second port respectively at 28 GHz for an antenna module according to a preferred embodiment of the present invention. Cross-polarized radiation pattern. The seventh figures (C) and (D) show the co-polarization sum on the XY plane generated by the first port and the second port respectively feeding the antenna module according to the preferred embodiment of the present invention at 31GHz. Cross-polarized radiation pattern. In the seventh figures (A) to (D), co-polar and cross-polar radiation patterns on the E plane (XY plane) are included. In the whole working frequency band, the degree of cross polarization is less than 13dB. At the same time, a stable radiation bandwidth is obtained over the entire operating frequency band.

The eighth figures (A) and (B) show the co-polarization sum on the YZ plane generated by the first port and the second port respectively feeding an antenna module according to a preferred embodiment of the present invention at 28 GHz. Cross-polarized radiation pattern. Eighth Figures (C) and (D) show a preferred implementation of the concept according to the present invention The antenna module of the example is fed through the first port and the second port respectively at 31GHz and generates co-polarized and cross-polarized radiation patterns on the YZ plane. In the eighth figures (A) to (D), co-polar and cross-polar radiation patterns on the H plane (YZ plane) are included.

Fig. 9(A) is a schematic diagram showing that an antenna module according to a preferred embodiment of the present invention is arranged in a wireless access point, so that the entire room can be covered by the antenna module. As shown in Figure 9 (A), when the room is a typical room, the antenna module 1 is set in the wireless access point 2, it will have a wide-angle coverage, so that the entire room is covered Covered by the antenna module 1 (see the first and second figures).

The ninth figure (B) shows that an antenna module according to a preferred embodiment of the present invention is arranged in a wireless access point, so that there is an inclination angle between the two, which can improve the coverage of the antenna module. Schematic. As shown in the ninth diagram (B), the inclination angle is θ. Here, the antenna module disposed inside the wireless access point 2 is the first antenna module 4 of a case and/or the second antenna module 5 of a case (both 4 and 5 are the antenna modules Group 1, see Figure 1, Figure 2 and Figure 9 (C)).

The ninth figure (C) shows that two antenna modules according to the preferred embodiment of the present invention are arranged in a wireless access point, so that there is a tilt between the two antenna modules and the wireless access point. A schematic diagram of increasing the coverage of the two antenna modules. As shown in FIG. 9 (C), the wireless access point 2 has a main body 21, and in the main body 21, a first antenna module 4 of a case and a second antenna module 5 of a case are arranged ( See Figure 9 (B)).

As shown in Figure 9 (A) to (C), the (end-fire) first antenna module 4 of this application and/or the (end-fire) second antenna module 5 of this application are arranged to operate in millimeter waves In the wireless access point 2 of (mmWave), the entire room can be covered by the first antenna module 4 and/or the second antenna module 5 set in the wireless access point 2 . Since the first antenna module 4 and/or the second antenna module 5 are thin and flexible, they are easy to be integrated into the feeding end of 5G millimeter waves. At the same time, the first antenna module 4 and/or the second antenna module 5 have orthogonal field diversity characteristics, and the user can make the first antenna module 4 and/or the second antenna module A second horizontal direction of 5 is slightly inclined to a first horizontal direction inside the wireless access point 2 when it is installed, so that the millimeter wave beam can easily cover the room where the wireless access point 2 is installed, so as to enhance the antenna The coverage of module 4 and/or the second antenna module 5 . Since the thickness of the first antenna module 4 and/or the second antenna module 5 in the preferred embodiment is 0.127mm, which is very thin, the wireless access operating in mmWave 5G with a thickness of 2mm can be used. The inside of point 2 is tilted about 25 degrees.

As shown in the first and second figures, the present invention provides the antenna module 1, which includes a shared radiator 11, has a first edge 111 and a second edge 112, a first port 12, and a second port 13. A first asymmetric coplanar stripline (ACS) feed line 14, fed from the first port 12, and connected to the first edge 111, and a second ACS feed line 15, fed from the first port 12; The two ports 13 are fed and connected to the second edge 112 , wherein the first edge 111 and the second edge 112 are orthogonal.

As described above in the antenna module 1, the shared radiator 11 further includes a stepped structure 131 having a third edge 1131, the third Two ends of the edge 1131 are respectively connected to one end of the first edge 111 and one end of the second edge 112 .

As described above, the antenna module 1 is disposed on a circuit board 3 , the circuit board 3 has a thickness, and the first ACS feed line 14 includes a first metal trace 141 and a first vertical corrugated structure 142 and a first asymmetric ground plane 143, the first metal trace 141 is connected to the first edge 111 and adjacent to the first vertical corrugated structure 142 and the first asymmetric ground plane 143, the first vertical corrugated structure 142 is adjacent to the first edge 111 and connected to the first asymmetric ground plane 143, the second ACS feed line 15 includes a second metal trace 151, a second vertical corrugated structure 152 and a second asymmetric ground The plane 153, the second metal trace 151 is connected to the second edge 112 and adjacent to the second vertical corrugated structure 152 and the second asymmetric ground plane 153, the first ACS feed line 14 is adjusted by adjusting the first A first width of a first gap 144 between the metal trace 141 and the first vertical corrugated structure 142 and the first asymmetric ground plane 143 is obtained to obtain a first characteristic impedance, and the second ACS feed line 15 uses A second characteristic impedance is obtained by adjusting a second width of a second gap 154 between the second metal trace 151 and the second vertical corrugated structure 152 and the second asymmetric ground plane 153 (see FIG. 1 ). with the second figure).

The above-mentioned antenna module 1 is suitable for a 5G millimeter-wave frequency band of 25GHz to 31GHz.

The present invention provides the wireless access point 2, comprising a body 21 having a first horizontal direction, and the first antenna module 4 disposed in the body 21 and having a second horizontal direction, wherein the second horizontal direction with the There is a first inclination angle θ between the first horizontal directions (refer to the ninth FIGS. (A) to (C)).

As described above, the wireless access point 2 further includes the second antenna module 5 , the body 21 has a first thickness, and both the first antenna module 4 and the second antenna module 5 have a second thickness, wherein the wireless access point 2 is the wireless access point 2 operating in 5G millimeter wave (mmWave 5G), the first thickness is greater than the second thickness, and the second antenna module has 5 A third horizontal direction with a second inclination angle between the third horizontal direction and the first horizontal direction, the first thickness is 2mm, the second thickness is 0.127mm, and the first inclination angle θ is the same as the first inclination angle θ. Both of the two inclination angles θ are less than or equal to 25° (refer to the ninth diagrams (A) to (C)).

The present invention provides the antenna module 1 including a shared radiator 11 and two asymmetric coplanar stripline (ACS) feed lines ( 14 and 15 ) adjacent to one side 111 of the shared radiator 11 respectively and the other side 112, and the one side 111 and the other side 112 are orthogonal, so that the antenna module 1 has an increased coverage (see the first, second and ninth diagrams (A )).

The above-mentioned antenna module 1 further includes a first port 12 and a second port 13 , wherein the two ACS feed lines ( 14 and 15 ) are fed from the first port 12 and the second port 13 respectively , and the two ACS feed lines ( 14 and 15 ) are respectively connected to the one side 111 and the other side 112 , the shared radiator 11 includes a stepped structure 113 having a stepped edge 1131 , and the stepped The edge 1131 is connected to the one side 111 and the other side 112 .

The antenna module 1 as described above, wherein each of the ACS feed lines (14 or 15) includes a metal trace (141 or 151), a vertical corrugated structure (142 or 152) and an asymmetric ground plane (143 or 153) ), each of the asymmetric ground planes (143 or 153) tends to cause the corresponding ACS feed lines (14 or 15) to generate a beam tilt when one end fires, and the stepped structure 113 is used to cancel the beam slope, and is used to increase an impedance bandwidth.

In summary, the present invention provides a dual-port orthogonal field diversity antenna module developed by combining asymmetric coplanar stripline feeding technology and shared radiator technology, the antenna module has a shared radiator , a first port, a second port and two ACS feed lines, which have relatively small volume, high gain and orthogonal field diversity characteristics, which can be used to compensate for the high loss of millimeter waves and improve the coverage of the antenna module Therefore, the antenna module of this case has advantages in the application of millimeter wave wireless access points, so it is indeed novel and progressive.

Therefore, even though the case has been described in detail by the above-mentioned embodiments, and various modifications can be made by those who are familiar with the art, they will not deviate from the protection of the scope of the patent application.

1: The antenna module of this case

11: Shared Radiators

111: First Edge

112: Second Edge

113: Ladder-like structure

1131: Third Edge/Step Edge

12: The first port

13: Second port

14: The first asymmetric coplanar stripline (ACS) feed line/ACS feed line

141: The first metal trace

142: The first vertical corrugated structure

143: First Asymmetric Ground Plane

144: First Void

15: Second ACS feed line/ACS feed line

151: Second metal trace

152: Second Vertical Corrugated Structure

153: Second asymmetric ground plane

154: Second void

3: circuit board/substrate

Claims (10)

An antenna module, comprising: a shared radiator having a first edge and a second edge; a first port; a second port; a first asymmetric coplanar stripline (ACS) feed line fed from the first port and connected to the first edge; and A second ACS feeding line is fed from the second port and connected to the second edge, wherein the first edge and the second edge are orthogonal. The antenna module of claim 1, wherein the shared radiator further comprises a stepped structure having a third edge, and two ends of the third edge are respectively connected to one end of the first edge and the second edge one end of the edge. The antenna module of claim 2, wherein the antenna module is disposed on a circuit board, the circuit board has a thickness, and the first ACS feed line includes a first metal trace, a first vertical corrugation structure and a first asymmetric ground plane, the first metal trace is connected to the first edge and adjacent to the first vertical corrugated structure and the first asymmetric ground plane, the first vertical corrugated structure is adjacent to the first an edge and connected to the first asymmetric ground plane, the second ACS feed line includes a second metal trace, a second vertical corrugated structure and a second asymmetric ground plane, the second metal trace is connected to the second edge and adjacent to the second vertical corrugated structure and the second asymmetric ground plane, the first ACS feeds The incoming line obtains a first characteristic impedance by adjusting a first width of a first gap between the first metal trace and the first vertical corrugated structure and the first asymmetric ground plane, and the second ACS feeds The incoming line obtains a second characteristic impedance by adjusting a second width of a second gap between the second metal trace and the second vertical corrugated structure and the second asymmetric ground plane. The antenna module of claim 3, wherein the circuit board is a substrate, and the thickness is 0.127mm, the antenna module can be applied to a 5G millimeter wave (mmWave 5G) wireless access point, and the first port is connected to a The second port excites the shared radiator in an orthogonal form, and the antenna module is a single-plane asymmetric co-planar stripline-fed antenna with orthogonal feeding for realizing an orthogonal field diversity . The antenna module of claim 4, wherein the antenna module is suitable for a 5G millimeter-wave frequency band of 25GHz to 31GHz. A wireless access point comprising: a body having a first horizontal direction; and A first antenna module according to claim 1, disposed in the body and having a second horizontal direction, wherein the second horizontal direction is the same as the first horizontal direction There is a first inclination angle between them. The wireless access point according to claim 6, further comprising a second antenna module according to claim 1, the body has a first thickness, and the first antenna module and the second antenna The modules all have a second thickness, wherein the wireless access point is a 5G millimeter wave (mmWave 5G) wireless access point, the first thickness is greater than the second thickness, and the second antenna module has a third In the horizontal direction, there is a second inclination angle between the third horizontal direction and the first horizontal direction, the first thickness is 2 mm, the second thickness is 0.127 mm, and both the first inclination angle and the second inclination angle are less than or equal to 25°. An antenna module, comprising: a shared radiator; and Two asymmetrical coplanar stripline (ACS) feed lines are respectively adjacent to one side and the other side of the shared radiator, and the one side and the other side are orthogonal, so that the antenna mode Groups have increased coverage by one. The antenna module of claim 8, further comprising a first port and a second port, wherein the two ACS feed lines are fed from the first port and the second port respectively, and the two ACS feed lines The incoming wires are respectively connected to the one side and the other side, and the shared radiator includes a stepped structure with a stepped edge, and the stepped edge is connected to the one side and the other side. The antenna module of claim 9, wherein each of the ACSs The feed line includes a metal trace, a vertical corrugated structure, and an asymmetric ground plane. Each of the asymmetric ground planes tends to cause the corresponding ACS feed lines to generate a beam inclination when fired at one end, and the stepped structure is is used to eliminate the beam tilt and to increase an impedance bandwidth.

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