Antennas and communication equipment

Abstract

The present application relates to an antenna and a communication device, wherein at least two bridges are arranged between a first antenna array and a second antenna array, and two output ends of different bridges are respectively connected to different first antenna units in the first antenna array and different second antenna units in the second antenna array. Compared with the conventional technology, in the embodiment of the present application, the phases of the two output ends of at least one bridge are opposite to the phases of the two output ends of other bridges, so that the groups of antenna units connected to the at least one bridge have opposite phase differences with the groups of antenna units connected to the other bridges, so that the offset angles of the synthesized beams of the groups of antenna units connected to the at least one bridge and the synthesized beams of the groups of antenna units connected to the other bridges cancel each other, and it can be ensured that the synthesized beams of all antenna units in the first antenna array and the second antenna array point to the front of the antenna, thereby improving the MIMO performance of the antenna.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an antenna and a communication device. Background Art

[0002] With the rapid development of mobile communication technology, the application of Multiple Input Multiple Output (MIMO) technology has become more mature, and full-band MIMO has gradually become a rigid requirement for communication systems. Therefore, base station antennas must integrate more antenna arrays to support full-band MIMO. At the same time, due to the limited wind load on base station towers, base station antennas need to be as small as possible, making miniaturized multi-array MIMO antennas the main research and development direction of base station antennas.

[0003] Traditional technology proposes a solution to use bridge multiplexing narrow beam units. By adding a weak coupling bridge to the feed network, the excitation signals at the two output ends of the weak coupling bridge simultaneously excite a horizontal binary array, thereby obtaining the required narrow beam unit. Although this solution avoids increasing the antenna length, the antenna beam pointing will deviate from the front of the antenna, causing the performance of the MIMO antenna to drop sharply. Summary of the invention

[0004] Based on this, it is necessary to provide an antenna and a communication device to address the above technical problems.

[0005] In a first aspect, an embodiment of the present application provides an antenna, comprising: a first antenna array and a second antenna array, wherein at least two bridges are arranged between the first antenna array and the second antenna array, and two output ends of the bridges are respectively connected to a first antenna unit in the first antenna array and a second antenna unit in the second antenna array;

[0006] Different bridges are connected to different first antenna units, and / or different bridges are connected to different second antenna units; and the phases of two output ends of at least one bridge are opposite to those of two output ends of other bridges.

[0007] In one embodiment, the at least two bridges include: a first partial bridge and a second partial bridge;

[0008] Among them, the phase of the first output end of the first part of the bridge connected to the first antenna array is opposite to the phase of the second output end of the second part of the bridge connected to the first antenna array; the phase of the third output end of the first part of the bridge connected to the second antenna array is opposite to the phase of the fourth output end of the second part of the bridge connected to the second antenna array.

[0009] In one embodiment, the offset angle of the composite beam of each first antenna unit and each second antenna unit connected by the first part of the bridge is opposite to the offset angle of the composite beam of each first antenna unit and each second antenna unit connected by the second part of the bridge.

[0010] In one embodiment, the first portion of bridges includes at least one bridge, and the second portion of bridges includes at least a second bridge.

[0011] In one embodiment, a first input end of the bridge is connected to a first feeding network corresponding to the first antenna array, and a second input end of the bridge is connected to a second feeding network corresponding to the second antenna array.

[0012] In one embodiment, each first antenna unit in the first antenna array that is not connected to the bridge is connected to the first feeding network, and each second antenna unit in the second antenna array that is not connected to the bridge is connected to the second feeding network.

[0013] In one of the embodiments, the power distribution ratio of the two output ends of the bridge is related to the target radiation parameter of the antenna and / or the number of bridges.

[0014] In one embodiment, the bridge comprises a 90 degree bridge.

[0015] In one embodiment, the first antenna unit and the second antenna unit connected by the bridge are located on the same horizontal line.

[0016] In a second aspect, an embodiment of the present application provides a communication device, the communication device comprising an antenna as in any embodiment of the first aspect above.

[0017] In the above antenna and communication device, at least two bridges are arranged between the first antenna array and the second antenna array, and two output ends of different bridges are respectively connected to different first antenna units in the first antenna array and different second antenna units in the second antenna array. Compared with the conventional technology, in the embodiment of the present application, the phases of the two output ends of at least one bridge are opposite to the phases of the two output ends of other bridges, so that the groups of antenna units connected to the at least one bridge have opposite phase differences with the groups of antenna units connected to the other bridges, so that the offset angles of the synthesized beams of the groups of antenna units connected to the at least one bridge and the synthesized beams of the groups of antenna units connected to the other bridges cancel each other, which can ensure that the synthesized beams of all antenna units in the first antenna array and the second antenna array point to the front of the antenna, thereby improving the MIMO performance of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For different technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the antenna in the embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the structure of an antenna in another embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of the structure of an antenna in another embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. It should be understood that the orientation or position relationship indicated by the terms "vertical", "horizontal", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0024] To facilitate understanding, the embodiments of the present application first introduce some nouns.

[0025] The directional pattern (or antenna directional pattern) involved in the embodiments of the present application refers to a graph showing the relative field strength (normalized modulus) of the radiation field changing with direction at a certain distance from the antenna, and is usually represented by two mutually perpendicular plane directional patterns in the direction of maximum radiation of the antenna. The antenna directional pattern can be divided into a horizontal plane directional pattern and a vertical plane directional pattern.

[0026] The beam involved in the embodiments of the present application refers to the shape formed by the electromagnetic waves emitted by the antenna (for example, like the beam emitted by a flashlight into the dark). Exemplarily, the narrow beam involved in the embodiments of the present application refers to a radiation pattern with a very small beam width.

[0027] With the rapid development of mobile communication technology, the application of MIMO technology has become more mature, and full-band MIMO has gradually become a rigid requirement of communication systems. Therefore, base station antennas must integrate more antenna arrays to support full-band MIMO. At the same time, due to the limited wind load on base station towers, base station antennas need to be as small as possible, making miniaturized multi-array MIMO antennas the main research and development direction of base station antennas.

[0028] Normally, in order for each antenna array of a dual-row low-frequency MIMO antenna to obtain good radiation performance, the column spacing between the two antenna arrays often needs to be greater than one wavelength, which will result in the antenna being too large and occupying a large amount of tower resources. At the same time, the large size will cause the antenna wind load to be too large, increasing the risk factor. In order to improve the radiation characteristics of the miniaturized dual-row low-frequency MIMO antenna, many array design methods have been proposed.

[0029] In one possible implementation method of conventional technology, it is proposed to reduce the antenna size by narrowing the column spacing between the two antenna arrays. However, narrowing the column spacing will cause serious coupling between the two antenna arrays, widening the radiation pattern, and reducing the gain.

[0030] Another possible implementation method in traditional technology is to use a bridge to multiplex narrow beam units. By adding a weak coupling bridge to the feed network, the excitation signals at the two output ends of the weak coupling bridge simultaneously excite a horizontal binary array, thereby obtaining the required narrow beam unit. Although this solution avoids increasing the antenna length, the antenna beam pointing will deviate from the front of the antenna, causing the radiation performance of the MIMO antenna to drop sharply.

[0031] The applicant has found that in the conventional technology, since the two output ends of the weakly coupled bridge have a certain phase difference, the directional pattern after the synthesis of a group of antenna units connected by the weakly coupled bridge will have a certain deflection, resulting in a beam offset in the directional pattern after the group of antenna units and other antenna units in the antenna array are superimposed. In the antenna and communication device provided by the embodiment of the present application, at least two bridges are arranged between the first antenna array and the second antenna array, and the phases of the two output ends of at least one bridge are opposite to the phase relationship of the two output ends of the other bridges, so that the groups of antenna units connected by the at least one bridge have opposite phase differences with the groups of antenna units connected by the other bridges, so that the offset angles of the synthesized beams of the groups of antenna units connected by the at least one bridge and the synthesized beams of the groups of antenna units connected by the other bridges cancel each other, and it can be ensured that the synthesized beams of all antenna units in the first antenna array and the second antenna array point to the front of the antenna. It can be seen that the antenna of the embodiment of the present application has better beam offset performance and beam width convergence on the basis of realizing a miniaturized MIMO antenna, and can greatly improve the MIMO performance of the antenna.

[0032] The communication equipment involved in the embodiments of the present application may include but is not limited to: base stations, transmission reception points (TRP). Among them, base stations: also known as radio access network (RAN) equipment, are devices that connect terminals to wireless networks, and can be base stations (base transceiver station, BTS) in global system of mobile communication (GSM) or code division multiple access (CDMA), or base stations (nodeB, NB) in wideband code division multiple access (WCDMA), or evolutionary base stations (eNB or eNodeB) in long term evolution (LTE), or relay stations or access points, or base stations (gNodeB, gNB) in 5G networks, etc., which are not limited here.

[0033] Figure 1 is a schematic diagram of the structure of the antenna in the embodiment of the present application, such as Figure 1As shown, the antenna of the embodiment of the present application may include at least two antenna arrays, each antenna array including multiple antenna units. Exemplarily, the antenna in the embodiment of the present application may include but is not limited to a MIMO antenna, wherein each antenna array may include but is not limited to a low-frequency antenna array.

[0034] It should be understood that the structures of each two adjacent antenna arrays are similar. For the sake of ease of description, the antenna structure of the embodiment of the present application is introduced by taking the first antenna array 10 and the second antenna array 11 as examples in the embodiment of the present application, wherein any antenna unit in the first antenna array 10 can be referred to as the first antenna unit 10A, and any antenna unit in the second antenna array 11 can be referred to as the second antenna unit 11A.

[0035] In the embodiment of the present application, at least two bridges 12 are arranged between the first antenna array 10 and the second antenna array 11 (for the convenience of illustration, Figure 1 In the figure (shown with two bridges 12 as an example), the two output ends of any bridge 12 are respectively connected to the first antenna unit 10A in the first antenna array 10 and the second antenna unit 11A in the second antenna array 11, so that the first antenna unit 10A and the second antenna unit 11A connected to the bridge 12 (or referred to as a group of antenna units multiplexed by the bridge 12) can be reused, so that the first antenna unit 10A and the second antenna unit 11A connected to the bridge 12 (or referred to as a group of antenna units multiplexed by the bridge 12) can synthesize a narrow beam.

[0036] It should be noted that, in the embodiment of the present application, different bridges 12 are connected to different first antenna units 10A, and / or, different bridges 12 are connected to different second antenna units 11A. For example, assuming that the first antenna array 10 includes: a first antenna unit 10A1-a first antenna unit 10A4, the second antenna array 11 includes a second antenna unit 11A1-a second antenna unit 11A4, and two bridges 12 are arranged between the first antenna array 10 and the second antenna array 11, wherein the two output ends of the first bridge 12 are respectively connected to the first antenna unit 10A1 and the second antenna unit 11A1, and the two output ends of the second bridge 12 are respectively connected to the first antenna unit 10A4 and the second antenna unit 11A4.

[0037] It should be understood that in the above embodiments of the present application, the first bridge 12 is arranged between the first first antenna unit 10A in the first antenna array 10 and the first second antenna unit 11A in the second antenna array 11, and the second bridge 12 is arranged between the last first antenna unit 10A in the first antenna array 10 and the last second antenna unit 11A in the second antenna array 11. Of course, the first bridge 12 or the second bridge 12 can also be arranged between other first antenna units 10A and corresponding second antenna units 11A, which is not limited to the embodiments of the present application.

[0038] Exemplarily, the phases of the two output ends of at least one bridge 12 in the embodiment of the present application are opposite to the phases of the two output ends of the other bridges 12, so that the groups of antenna units multiplexed by the at least one bridge 12 have opposite phase differences from the groups of antenna units multiplexed by the other bridges 12, so that the offset angles of beam 1 synthesized by the groups of antenna units multiplexed by the at least one bridge 12 and beam 2 synthesized by the groups of antenna units multiplexed by the other bridges 12 are opposite, so that the offset angles of beam 1 and beam 2 cancel each other out, and it can be ensured that the synthesized beams of all antenna units in the first antenna array 10 and the second antenna array 11 can point to the front of the antenna, which is beneficial to improving the MIMO performance of the antenna. It should be understood that the arbitrary offset angle involved in the embodiment of the present application refers to the angle between the horizontal axis of the antenna pattern.

[0039] The antenna of the embodiment of the present application is provided with at least two bridges between the first antenna array and the second antenna array, and the two output ends of different bridges are respectively connected to different first antenna units in the first antenna array and different second antenna units in the second antenna array. Compared with the conventional technology, the embodiment of the present application has two output ends of at least one bridge whose phases are opposite to the two output ends of other bridges, so that each group of antenna units connected to the at least one bridge has an opposite phase difference with each group of antenna units connected to the other bridges, so that the offset angles of the synthesized beams of each group of antenna units connected to the at least one bridge and the synthesized beams of each group of antenna units connected to the other bridges cancel each other, and can ensure that the synthesized beams of all antenna units in the first antenna array and the second antenna array point to the front of the antenna, thereby improving the MIMO performance of the antenna.

[0040] In one embodiment, based on the above embodiment, the embodiment of the present application further introduces the relevant contents of the above at least two bridges. Figure 2 This is a schematic diagram of the structure of an antenna in another embodiment of the present application. Figure 2As shown, the at least two bridges 12 of the embodiment of the present application may include: a first partial bridge 12Q1 and a second partial bridge 12Q2, wherein the first partial bridge 12Q1 may include at least one bridge 12, and the second partial bridge 12Q2 includes at least one bridge 12 (for ease of illustration, Figure 2 In the example, the first part of the bridge 12Q1 includes two bridges 12, and the second part of the bridge 12Q2 includes one bridge 12). By way of example, any bridge 12 involved in the embodiments of the present application may include but is not limited to a 90-degree bridge.

[0041] In the embodiment of the present application, the phase P1 of the first output terminal of the first partial bridge 12Q1 connected to the first antenna array 10 is opposite to the phase P2 of the second output terminal of the second partial bridge 12Q2 connected to the first antenna array 10; the phase P3 of the third output terminal of the first partial bridge 12Q1 connected to the second antenna array 11 is opposite to the phase P4 of the fourth output terminal of the second partial bridge 12Q2 connected to the second antenna array 11. For example, P1 can be -90 degrees, P2 can be 0 degrees; P3 can be 0 degrees, and P4 can be -90 degrees. For another example, P1 can be +45 degrees, P2 can be -45 degrees; P3 can be -45 degrees, and P4 can be +45 degrees.

[0042] It should be noted that the arbitrary end phase of the first partial bridge 12Q1 in the embodiment of the present application (for example, the first output end phase, or the third output end phase) may refer to the general term for the arbitrary end phase of each bridge in the first partial bridge 12Q1. For example, when the first partial bridge 12Q1 includes one bridge, the arbitrary end phase of the first partial bridge 12Q1 may include the arbitrary end phase of the bridge; when the first partial bridge 12Q1 includes multiple bridges, the arbitrary end phase of the first partial bridge 12Q1 may include the arbitrary end phase of each bridge in the first partial bridge 12Q1.

[0043] Similarly, the arbitrary end phase of the second partial bridge 12Q2 in the embodiment of the present application (for example, the second output end phase, or the fourth output end phase) may refer to the general term for the arbitrary end phases of each bridge in the second partial bridge 12Q2.

[0044] It should be understood that since the bridge 12 involved in the embodiment of the present application is a 90-degree bridge, the phase P1 of the first output terminal of the first part of the bridge 12Q1 connected to the first antenna array 10 is opposite to the phase P3 of the third output terminal of the first part of the bridge 12Q1 connected to the second antenna array 11; the phase P2 of the second output terminal of the second part of the bridge 12Q2 connected to the first antenna array 10 is opposite to the phase P4 of the fourth output terminal of the second part of the bridge 12Q2 connected to the second antenna array 11.

[0045] In the embodiment of the present application, the phase relationship between the two output ends of each bridge in the first part of the bridge 12Q1 is opposite to the phase relationship between the two output ends of each bridge in the second part of the bridge 12Q2, so that the offset angle of the synthetic beam 1' of each first antenna unit connected to the first part of the bridge 12Q1 in the first antenna array 10 and each second antenna unit connected to the first part of the bridge 12Q1 in the second antenna array 11 is opposite to the offset angle of the synthetic beam 2' of each first antenna unit connected to the second part of the bridge 12Q2 in the first antenna array 10 and each second antenna unit connected to the second part of the bridge 12Q2 in the second antenna array 11, so that the offset angles of the synthetic beam 1' and the synthetic beam 2' cancel each other, which can ensure that the synthesized beam of all antenna units in the first antenna array 10 and the second antenna array 11 can point to the front of the antenna, thereby facilitating improving the MIMO performance of the antenna.

[0046] Exemplarily, the power distribution ratio of the two output ends of any bridge 12 in the embodiment of the present application may be related to the target radiation parameter of the antenna and / or the number of bridges, that is, the power distribution ratio of the bridge may be flexibly adjusted according to the target radiation parameter of the antenna and / or the number of bridges to ensure that the beam synthesized by all antenna units in the first antenna array 10 and the second antenna array 11 can point directly in front of the antenna, thereby improving the radiation performance of the antenna. For example, the target radiation parameter of the antenna may include but is not limited to antenna gain index requirements and / or beam width index requirements, etc.

[0047] Exemplarily, assuming that the first part of the bridge 12Q1 includes one bridge 12, and the second part of the bridge 12Q2 includes one bridge 12, by having the two output ends of the bridge 12 in the first part of the bridge 12Q1 have a phase relationship opposite to the two output ends of the bridge 12 in the second part of the bridge 12Q2, the offset angle of the composite beam 1' of the first antenna unit connected to the first part of the bridge 12Q1 in the first antenna array 10 and the second antenna unit connected to the first part of the bridge 12Q1 in the second antenna array 11 is +20 degrees, and the offset angle of the composite beam 2' of the first antenna unit connected to the second part of the bridge 12Q2 in the first antenna array 10 and the second antenna unit connected to the second part of the bridge 12Q2 in the second antenna array 11 is -20 degrees. It can be seen that the offset angles of the composite beam 1' and the composite beam 2' can cancel each other, thereby ensuring that the composite beams of all antenna units in the first antenna array 10 and the second antenna array 11 can point to the front of the antenna.

[0048] As another example, assuming that the first partial bridge 12Q1 includes two bridges 12, and the second partial bridge 12Q2 includes one bridge 12, the phases of the two output ends of each bridge 12 in the first partial bridge 12Q1 are opposite to the phases of the two output ends of the bridge 12 in the second partial bridge 12Q2, and the synthetic wave of each first antenna unit in the first antenna array 10 connected to the first bridge 12 in the first partial bridge 12Q1 and each second antenna unit in the second antenna array 11 connected to the first bridge 12 in the first partial bridge 12Q1 is The offset angle of beam 1" is +10 degrees; the offset angle of the composite beam 1"' of each first antenna unit in the first antenna array 10 connected to the second bridge 12 in the first part of the bridge 12Q1 and each second antenna unit in the second antenna array 11 connected to the second bridge 12 in the first part of the bridge 12Q1 is +10 degrees; the offset angle of the composite beam 2' of the first antenna unit in the first antenna array 10 connected to the second part of the bridge 12Q2 and the second antenna unit in the second antenna array 11 connected to the second part of the bridge 12Q2 is -20 degrees. It can be seen that the offset angle of the composite beam 1' (the composite beam corresponding to the above-mentioned composite beam 1" and the above-mentioned composite beam 1"') of each first antenna unit connected to the first partial bridge 12Q1 in the first antenna array 10 and each second antenna unit connected to the first partial bridge 12Q1 in the second antenna array 11 is +20 degrees, which is opposite to the offset angle of the composite beam 2' of the first antenna unit connected to the second partial bridge 12Q2 in the first antenna array 10 and the second antenna unit connected to the second partial bridge 12Q2 in the second antenna array 11, so that the offset angles of the composite beam 1' and the composite beam 2' can cancel each other, and ensure that the composite beams of all antenna units in the first antenna array 10 and the second antenna array 11 can point to the front of the antenna.

[0049] In one embodiment, based on the above embodiment, the embodiment of the present application introduces the relevant contents of the feeding network of the antenna. Figure 3 This is a schematic diagram of the structure of an antenna in another embodiment of the present application. Figure 3 As shown, the antenna in the embodiment of the present application may further include: a first feeding network 13 corresponding to the first antenna array 10 and a second feeding network 14 corresponding to the second antenna array 11 .

[0050] Illustratively, the central axes of the first antenna units 10A in the first antenna array 11 in the embodiment of the present application may coincide, and / or the central axes of the second antenna units 11A in the second antenna array 11 may coincide, which is beneficial to improving the MIMO performance of the multi-port antenna.

[0051] Of course, the central axes of the first antenna units 10A in the first antenna array 11 in the embodiment of the present application may not overlap (for example, two adjacent first antenna units 10A may be staggered with each other, etc.), and / or the central axes of the second antenna units 11A in the second antenna array 11 may not overlap.

[0052] Exemplarily, the first antenna unit 10A and the second antenna unit 11A connected by any bridge 12 in the embodiment of the present application may be located on the same horizontal line, so as to improve the performance of the narrow beam synthesized by a group of antenna units multiplexed by the bridge 12.

[0053] It should be noted that, for the sake of convenience, Figure 3 In the figure, two bridges 12 are provided between the first antenna array 10 and the second antenna array 11 as an example.

[0054] Exemplarily, each first antenna unit 10A in the first antenna array 10 in the embodiment of the present application that is not connected to the bridge 12 can be connected to the first feeding network 13 so that each first antenna unit 10A can be fed through the first feeding network 13; each second antenna unit 11A in the second antenna array 11 that is not connected to the bridge 12 can be connected to the second feeding network 14 so that each second antenna unit 11A can be fed through the second feeding network 14.

[0055] Exemplarily, the first input end of any bridge 12 in the embodiments of the present application can be connected to the first feeding network 13 corresponding to the first antenna array 10, and the second input end of the bridge 12 can be connected to the second feeding network 14 corresponding to the second antenna array 11, so that the first feeding network 13 and / or the second feeding network 14 can be used to feed the antenna units connected to the bridge in the first antenna array 10 and the second antenna array 11, so that the antenna units connected to the bridge can operate when fed by the first feeding network 13 and / or the second feeding network 14, which is conducive to obtaining the required narrow beam.

[0056] It should be understood that Figure 3 As shown, the input end of the first feeding network 13 is used to input a signal 1 corresponding to the first feeding network 13 , and / or the input end of the second feeding network 14 is used to input a signal 2 corresponding to the second feeding network 14 .

[0057] In one embodiment, the present application also provides a communication device, which may include the antenna provided in the above embodiment of the present application. The structure of the antenna may refer to the structure of the antenna provided in the above embodiment of the present application, and its implementation principle and technical effect are similar, which will not be repeated here.

[0058] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An antenna, characterized in that: include: A first antenna array and a second antenna array, wherein at least two bridges are provided between the first antenna array and the second antenna array, and two output ends of the bridges are respectively connected to a first antenna unit in the first antenna array and a second antenna unit in the second antenna array; Wherein, different bridges are connected to different first antenna units, and / or different bridges are connected to different second antenna units; the phases of two output ends of at least one bridge are opposite to the phases of two output ends of other bridges; Wherein, the at least two bridges include: a first partial bridge and a second partial bridge; The phase of the first output terminal of the first partial bridge connected to the first antenna array is opposite to the phase of the second output terminal of the second partial bridge connected to the first antenna array; the phase of the third output terminal of the first partial bridge connected to the second antenna array is opposite to the phase of the fourth output terminal of the second partial bridge connected to the second antenna array; The offset angle of the composite beam of each of the first antenna units and each of the second antenna units connected by the first part of the bridge is opposite to the offset angle of the composite beam of each of the first antenna units and each of the second antenna units connected by the second part of the bridge.

2. The antenna according to claim 1, characterized in that The first partial bridge includes at least one of the bridges, and the second partial bridge includes at least one of the bridges.

3. The antenna according to claim 1 or 2, characterized in that: A first input end of the bridge is connected to a first feeding network corresponding to the first antenna array, and a second input end of the bridge is connected to a second feeding network corresponding to the second antenna array.

4. The antenna according to claim 3, characterized in that: Each first antenna unit in the first antenna array that is not connected to the bridge is connected to the first feeding network, and each second antenna unit in the second antenna array that is not connected to the bridge is connected to the second feeding network.

5. The antenna according to claim 1 or 2, characterized in that: The power distribution ratio of the two output ends of the bridge is related to the target radiation parameter of the antenna and / or the number of the bridges.

6. The antenna according to claim 1 or 2, characterized in that: The bridge comprises a 90 degree bridge.

7. The antenna according to claim 1 or 2, characterized in that: The first antenna unit and the second antenna unit connected by the bridge are located on the same horizontal line.

8. The antenna according to claim 1 or 2, characterized in that: Central axes of the first antenna units in the first antenna array coincide with each other.

9. The antenna according to claim 1 or 2, characterized in that: Central axes of the second antenna units in the second antenna array coincide with each other.

10. A communication device, characterized in that: The communication device comprises the antenna according to any one of claims 1-9.

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