Antenna

Abstract

The invention relates to the technical field of wireless communication, and provides an antenna. The antenna comprises an antenna body and a waveguide Butler. The waveguide Butler is connected with at least two input ends and at least two output ends. Each input end is configured to be connected with a signal source. The output end is connected with the antenna body. The waveguide Butler is configured to couple input signals from at least two input ends into a signal, and select one output end to send the signal to the antenna body. Therefore, all feed sources corresponding to a single wave beam can be fully utilized, the feed source utilization rate is improved, and the feed source utilization rate reaches 100%.

Description

Technical Field

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

[0002] With the rapid development of wireless communication technology, the performance requirements for antenna systems are becoming increasingly stringent. Phased array-fed multi-beam lens antennas have attracted widespread attention due to their ability to achieve high gain, multiple beams, and flexible scanning. However, in related technologies, a single beam can only activate a limited number of feed elements, resulting in low feed utilization and, in turn, affecting the overall performance and efficiency of the antenna system. Summary of the Invention

[0003] An embodiment of the present application provides an antenna that improves feed source utilization, thereby at least partially solving the above-mentioned technical problems.

[0004] To achieve the above objectives, the present application provides an antenna, comprising:

[0005] Antenna body;

[0006] The waveguide Butler is connected to at least two input ends and at least two output ends, each of the input ends is configured to be connected to a signal source, and the output end is connected to the antenna body. The waveguide Butler is configured to couple the input signals from at least two of the input ends into one signal and select one of the output ends to send to the antenna body.

[0007] Optionally, the waveguide Butler has four input terminals, the excitation amplitudes of the signal sources connected to the four input terminals are the same, and the phase difference between two adjacent input terminals (3) is one of -135°, -45°, 45°, and 135°.

[0008] Optionally, the waveguide Butler includes a first sub-segment, a second sub-segment, a third sub-segment and a fourth sub-segment connected in sequence along a first direction, the first sub-segment is connected to the four input ends, the fourth sub-segment is connected to the at least two output ends, the first sub-segment is configured to phase shift and couple the signal, the second sub-segment is configured to couple the signal, the third sub-segment is configured to phase shift and couple the signal, and the fourth sub-segment is configured to couple the signal.

[0009] Optionally, the four input ends include a first input end, a second input end, a third input end and a fourth input end, and the first sub-segment includes a first phase shifter, a first coupler and a second phase shifter arranged at intervals along the second direction, the first phase shifter is connected to the first input end, the first coupler is connected to the second input end and the third input end, and the second phase shifter is connected to the fourth input end, wherein the first coupler is a cross coupler, and the second direction is arranged at an angle to the first direction.

[0010] Optionally, the second sub-segment includes a second coupler and a third coupler spaced apart along the second direction, the second coupler is connected to the first phase shifter and the first coupler, and is used to couple the signal flowing through the first phase shifter and the first coupler, and the third coupler is connected to the second phase shifter and the first coupler, and is used to couple the signal flowing through the second phase shifter and the first coupler.

[0011] Optionally, the third sub-segment includes a third phase shifter, a fourth coupler and a fourth phase shifter arranged at intervals along the second direction, the third phase shifter is connected to the second coupler, the fourth coupler is connected to the second coupler and the third coupler, and the fourth phase shifter is connected to the third coupler.

[0012] Optionally, the fourth sub-segment includes a fifth coupler and a sixth coupler spaced apart along the second direction, the fifth coupler is connected to the third phase shifter and the fourth coupler, and the sixth coupler is connected to the fourth coupler and the fourth phase shifter, wherein the fifth coupler is connected to the two output ends, and the sixth coupler is connected to the two output ends.

[0013] Optionally, the antenna body is a horn antenna, the horn antenna includes a straight waveguide section and a waveguide-to-horn section, and the straight waveguide section is connected to the output end.

[0014] Optionally, the antenna further includes:

[0015] A lens is provided at the radiating end of the antenna body and is used to increase the antenna gain;

[0016] The lens comprises at least two dielectric layers, and the dielectric constants of the at least two dielectric layers decrease from the inside to the outside.

[0017] Optionally, the lens includes a first dielectric layer, a second dielectric layer and a third dielectric layer sequentially arranged from the inside to the outside, the first dielectric layer is a cycloolefin polymer optical material layer, the second dielectric layer is a polypropylene layer, and the third dielectric layer is a Teflon layer.

[0018] In the antenna of the present application, multiple input ports are connected to multiple signal sources. After the multiple signals are input into the waveguide Butler from different input ports, they are coupled into a single signal through the waveguide Butler. Electromagnetic waves are then radiated outward through one of the output ports in conjunction with the antenna body. As a result, all feed sources corresponding to a single beam can be fully utilized, improving feed utilization to 100%.

[0019] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0021] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0022] Figure 1 is a schematic diagram of the overall structure of an antenna provided in an exemplary embodiment of the present application;

[0023] Figure 2 is a schematic structural diagram of an antenna body provided in an exemplary embodiment of the present application;

[0024] Figure 3 is a schematic structural diagram of a waveguide Butler provided in an exemplary embodiment of the present application;

[0025] Figure 4 is a cross-sectional view of a lens provided in an exemplary embodiment of the present application;

[0026] Figure 5 is an energy schematic diagram of an antenna provided in an exemplary embodiment of the present application;

[0027] Figure 6 is the beam scanning pattern of the antenna provided in the exemplary embodiment of the present application.

[0028] Description of reference numerals:

[0029] 1. Antenna body; 11. Straight waveguide section; 12. Waveguide to horn section;

[0030] 2. Waveguide Butler; 21. First subsegment; 211. First phase shifter; 212. First coupler; 213. Second phase shifter; 22. Second subsegment; 221. Second coupler; 222. Third coupler; 23. Third subsegment; 231. Third phase shifter; 232. Fourth coupler; 233. Fourth phase shifter; 24. Fourth subsegment; 241. Fifth coupler; 242. Sixth coupler;

[0031] 3. Input terminal; 31. First input terminal; 32. Second input terminal; 33. Third input terminal; 34. Fourth input terminal;

[0032] 4. Output terminal;

[0033] 5. Lens; 51. First dielectric layer; 52. Second dielectric layer; 53. Third dielectric layer. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0035] Reference Figures 1 to 6 The present application provides an antenna. The antenna includes an antenna body 1 and a waveguide butler 2. The waveguide butler 2 is connected to at least two input terminals 3 and at least two output terminals 4. Each input terminal 3 is configured to be connected to a signal source. The output terminal 4 is connected to the antenna body 1. The waveguide butler 2 is configured to couple the input signals from the at least two input terminals 3 into one signal and select one output terminal 4 to send to the antenna body 1.

[0036] In the embodiment of the present application, multiple signal sources are connected via multiple input terminals 3. After the multiple signals are input into the waveguide Butler 2 from different input terminals 3, they are coupled into one signal through the waveguide Butler 2 and radiated outwardly through one of the output terminals 4 in conjunction with the antenna body 1. As a result, all feed sources corresponding to a single beam can be fully utilized, improving the feed utilization rate to 100%.

[0037] It should be noted that, "selecting one" means that only one of the at least two output terminals 4 radiates electromagnetic waves outward. For example, the output terminals 4 are set to 4, namely the first output terminal, the second output terminal, the third output terminal and the fourth output terminal arranged at intervals from left to right. When the phase difference between the input signals of two adjacent input terminals 3 is 45°, electromagnetic waves can be radiated outward through the first output terminal. When the phase difference between the input signals of two adjacent input terminals 3 is -135°, electromagnetic waves can be radiated outward through the second output terminal. When the phase difference between the input signals of two adjacent input terminals 3 is 135°, electromagnetic waves can be radiated outward through the third output terminal. When the phase difference between the input signals of two adjacent input terminals 3 is -45°, electromagnetic waves can be radiated outward through the fourth output terminal.

[0038] It is understandable that when forming a beam scan, all input ends 3 of the waveguide Butler 2 can be utilized. For an array antenna, the array antenna is fully utilized, so the feed utilization rate reaches 100%.

[0039] Compared to the waveguide Butler 2 in the traditional antenna, the waveguide Butler 2 in the traditional structure is used to output multiple beams with a fixed phase difference. The embodiment of the present application is similar to using the waveguide Butler 2 in reverse, so that the input end 3 and the output end 4 of the waveguide Butler 2 in the traditional antenna are used in reverse, so that multiple signals are coupled and output through one output end 4. As a result, the feed source is fully utilized, the feed source utilization rate is 100%, and the Equivalent Isotropically Radiated Power (EIRP) is effectively improved.

[0040] In some embodiments, the antenna is a phased array antenna, which includes multiple antenna bodies 1 and multiple waveguide butlers 2.

[0041] In some embodiments, the number of input terminals 3 and output terminals 4 is the same. For example, the number of input terminals 3 and output terminals 4 is four.

[0042] In some embodiments, the coupled signal may be output from one of the output terminals 4 to the antenna body 1 based on the phase of the signal source of the phase shifter and the input terminal 3 in the waveguide Butler 2 .

[0043] In some embodiments, the waveguide Butler 2 is an axisymmetric structure.

[0044] like Figure 3 As shown, in some embodiments, the waveguide Butler 2 has four input terminals 3, the excitation amplitudes of the signal sources connected to the four input terminals 3 are the same, and the phase difference between two adjacent input terminals 3 is one of -135°, -45°, 45°, and 135°.

[0045] It can be understood that by exciting the four input terminals 3 with signals of the same amplitude and varying phase gradients, and then phase shifting and coupling through the waveguide Butler 2, the coupling of the individual signals can be enhanced and then radiated outward, thereby ensuring enhanced signal coupling and gain.

[0046] like Figure 6 As shown, in some embodiments, the phase difference between signals connected to two adjacent input terminals 3 can be -135°, -45°, 45°, and 135°, and the beams formed are all continuous beams. For example, if the phases of signals connected to four input terminals 3 are 0°, 45°, 90°, and 135°, respectively, the phase difference between signals connected to two adjacent input terminals 3 is 45°.

[0047] In some embodiments, the phases of the signal sources connected to the four input ports 3 can be changed to obtain beams with different directions.

[0048] like Figure 3 As shown, in some embodiments, the waveguide Butler 2 includes a first subsegment 21, a second subsegment 22, a third subsegment 23, and a fourth subsegment 24, which are sequentially connected along a first direction. The first subsegment 21 is connected to four input terminals 3. The fourth subsegment 24 is connected to at least two output terminals 4. The first subsegment 21 is configured to phase shift and couple signals. The second subsegment 22 is configured to couple signals. The third subsegment 23 is configured to phase shift and couple signals. The fourth subsegment 24 is configured to couple signals.

[0049] It is understood that the first sub-segment 21 is used to connect the four input terminals 3 and perform a first phase shift on a portion of the signal to achieve a first coupling. In some embodiments, the first coupling may be cross-coupling. The second sub-segment 22 is used to perform a second coupling on the signal after the first phase shift and the cross-coupled signal to achieve signal enhancement. The third sub-segment 23 is used to perform a second phase shift and a third coupling on the signal after the second coupling to achieve signal enhancement. The fourth sub-segment 24 is used to perform a fourth coupling on the two remaining signals after the second phase shift and the third coupling to achieve signal enhancement.

[0050] In some embodiments, the first sub-segment 21 , the second sub-segment 22 , the third sub-segment 23 and the fourth sub-segment 24 are integrally formed.

[0051] In some embodiments, the first direction is the length direction of the waveguide Butler 2 .

[0052] like Figure 3As shown, in some embodiments, the four input terminals 3 include a first input terminal 31, a second input terminal 32, a third input terminal 33, and a fourth input terminal 34. The first subsegment 21 includes a first phase shifter 211, a first coupler 212, and a second phase shifter 213 spaced apart along the second direction. The first phase shifter 211 is connected to the first input terminal 31. The first coupler 212 is connected to the second input terminal 32 and the third input terminal 33. The second phase shifter 213 is connected to the fourth input terminal 34. The first coupler 212 is a cross coupler. The second direction is arranged at an angle to the first direction.

[0053] It can be understood that the signal input from the first input terminal 31 is first phase-shifted by the first phase shifter 211, the signals input from the second input terminal 32 and the third input terminal 33 are cross-coupled by the first coupler 212, and the signals input from the four input terminals 3 are first coupled by the second phase shifter 213.

[0054] The signal input from the first input terminal 31 and the signal input from the fourth input terminal 34 are phase-shifted by the first phase shifter 211 and the second phase shifter 213 respectively before subsequent coupling, so as to ensure that the phases of the two coupled signals are the same or the phase difference is close to 0°, so as to ensure that the signals are enhanced after the two signals are coupled.

[0055] In some embodiments, the first phase shifter 211 is a 0° phase shifter, the second phase shifter 213 is a 0° phase shifter, and the first coupler 212 is a cross coupler (0 dB coupler).

[0056] like Figure 3 As shown, in some embodiments, the second subsegment 22 includes a second coupler 221 and a third coupler 222 spaced apart along the second direction. The second coupler 221 is connected to the first phase shifter 211 and the first coupler 212, and is used to couple the signal flowing through the first phase shifter 211 and the first coupler 212. The third coupler 222 is connected to the second phase shifter 213 and the first coupler 212, and is used to couple the signal flowing through the second phase shifter 213 and the first coupler 212.

[0057] It is understood that the second coupler 221 can couple the signal after phase shifting from the first phase shifter 211 and one of the signals after cross-coupling from the first coupler 212 to achieve signal enhancement. The third coupler 222 can couple the signal after phase shifting from the second phase shifter 213 and the other signal after cross-coupling from the first coupler 212 to achieve signal enhancement.

[0058] In some embodiments, the second coupler 221 is a 3 dB coupler. The third coupler 222 is a 3 dB coupler.

[0059] In some embodiments, the second direction is the width direction of the waveguide Butler 2 , that is, the first direction is perpendicular to the second direction.

[0060] In some embodiments, the first direction and the second direction may be arranged at an acute angle, or at an obtuse angle.

[0061] like Figure 3 As shown, in some embodiments, the third subsegment 23 includes a third phase shifter 231, a fourth coupler 232, and a fourth phase shifter 233, which are spaced apart along the second direction. The third phase shifter 231 is connected to the second coupler 221. The fourth coupler 232 is connected to the second coupler 221 and the third coupler 222. The fourth phase shifter 233 is connected to the third coupler 222.

[0062] like Figure 5 As shown, the enhanced signal coupled by the second coupler 221 can be phase-shifted by the third phase shifter 231. The enhanced signal coupled by the third coupler 222 can be cross-coupled by the fourth coupler 232. At this point, the signal at the junction between the second coupler 221 and the fourth coupler 232 can be canceled, and no signal flows from there into the fourth coupler 232. The enhanced signal coupled by the third coupler 222 directly enters the fourth coupler 232 and does not enter the fourth phase shifter 233.

[0063] Alternatively, the enhanced signal coupled by the second coupler 221 can be cross-coupled via the fourth coupler 232. The enhanced signal coupled by the third coupler 222 can be phase-shifted by the fourth phase shifter 233. In this case, the signal at the connection between the third coupler 222 and the fourth coupler 232 can be canceled, and no signal flows from this connection into the fourth coupler 232. The enhanced signal coupled by the second coupler 221 directly enters the fourth coupler 232 and does not enter the third phase shifter 231.

[0064] In some embodiments, the third phase shifter 231 is a -45° phase shifter, the fourth phase shifter 233 is a -45° phase shifter, and the fourth coupler 232 is a cross coupler (0 dB coupler).

[0065] like Figure 3 As shown, in some embodiments, the fourth subsegment 24 includes a fifth coupler 241 and a sixth coupler 242 spaced apart along the second direction. The fifth coupler 241 is connected to the third phase shifter 231 and the fourth coupler 232. The sixth coupler 242 is connected to the fourth coupler 232 and the fourth phase shifter 233. The fifth coupler 241 is connected to two output terminals 4, and the sixth coupler 242 is connected to two output terminals 4.

[0066] It is understood that the enhanced signal after phase shifting from the third phase shifter 231 and the enhanced signal after cross-coupling from the fourth coupler 232 can be coupled through the fifth coupler 241, thereby further achieving signal enhancement, and then the signal is output to the antenna body 1 through one of the output terminals 4 of the fifth coupler 241. Alternatively, the enhanced signal after phase shifting from the fourth phase shifter 233 and the enhanced signal after cross-coupling from the fourth coupler 232 can be coupled through the sixth coupler 242, thereby further achieving signal enhancement, and then the signal is output to the antenna body 1 through one of the output terminals 4 of the sixth coupler 242.

[0067] In some embodiments, the fifth coupler 241 is a 3 dB coupler. The sixth coupler 242 is a 3 dB coupler.

[0068] like Figure 2 As shown, in some embodiments, the antenna body 1 is a horn antenna. The horn antenna includes a straight waveguide section 11 and a waveguide-to-horn section 12. The straight waveguide section 11 is connected to the output terminal 4.

[0069] It is understandable that the interior of the horn antenna is a metal cavity structure, and the external horn part is also made of metal material. The straight waveguide section 11 is used to connect the fifth coupler 241 or the sixth coupler 242 of the antenna body 1. Its shape is set to be rectangular, which can ensure a smooth impedance transition, reduce reflection, avoid signal loss or power reflection due to impedance mutation, and realize the mechanical connection between the horn antenna and the waveguide Butler 2. The waveguide to horn section 12 is set to a horn shape, which can reduce the scattering and diffraction loss caused by mutations, suppress edge diffraction, and the smooth transition curve can reduce the sidelobe rise and cross polarization caused by edge currents, and ultimately radiate energy directionally into free space.

[0070] like Figure 1 and Figure 4 As shown, in some embodiments, the antenna further includes a lens 5. The lens 5 is disposed at the radiating end of the antenna body 1 and is used to increase the antenna gain. The lens 5 includes at least two dielectric layers, and the dielectric constants of the at least two dielectric layers decrease from the inside to the outside.

[0071] It can be understood that the high gain of the antenna is achieved through lens 5. By making the dielectric constant of at least two dielectric layers decrease from the inside to the outside, a refractive index distribution can be achieved, enabling perfect focusing or beam steering. Spherical symmetry can also be maintained, supporting multiple angles of incidence. Furthermore, drastic impedance changes can be avoided, thereby suppressing interface reflections, improving the wave transmission efficiency of lens 5, and reducing energy loss.

[0072] In some embodiments, lens 5 is a Luneburg lens 5. The Luneburg lens 5 generates a plane in a certain direction, thereby forming a beam in a certain direction. At least two dielectric layers are initially designed using the equal thickness layering method or the equal difference layering method. The initially designed lens 5 is then optimized using a genetic algorithm to meet the required specifications.

[0073] like Figure 4 As shown, in some embodiments, the lens 5 includes a first dielectric layer 51, a second dielectric layer 52, and a third dielectric layer 53, which are sequentially arranged from the inside to the outside. The first dielectric layer 51 is a cycloolefin polymer optical material layer, the second dielectric layer 52 is a polypropylene layer, and the third dielectric layer 53 is a Teflon layer.

[0074] In some embodiments, the antenna body 1 is located at the focal position of the lens 5 .

[0075] It is understandable that placing the antenna body 1 at the focal point of the lens 5 maximizes the antenna gain. Since the focal point is where energy is focused, placing the antenna body 1 at the focal point maximizes the gain. However, placing the antenna body 1 away from the focal point of the lens 5 results in reduced antenna gain.

[0076] In some embodiments, the focal position of the lens 5 can be obtained by injecting a plane wave into the lens 5 .

[0077] In some embodiments, if the lens 5 forms a focal spot, the antenna body 1 can be first placed within the range of the focal spot, and then gradually optimized to find the position with the maximum gain.

[0078] In some embodiments, the lens 5 includes a first dielectric layer 51, a second dielectric layer 52 and a third dielectric layer 53 arranged in sequence from the inside to the outside. The first dielectric layer 51 is a cycloolefin polymer optical material layer, the second dielectric layer 52 is a polypropylene layer, and the third dielectric layer 53 is a Teflon layer.

[0079] It is understood that the first dielectric layer 51 located on the innermost side is a cycloolefin polymer optical material layer (COP optical material layer), which has a dielectric constant of 2.3256 and a loss tangent of 8×10 -4 The dielectric constant of the polypropylene layer in the middle is 2.21 and the loss tangent is 3×10 -4 The dielectric constant of the Teflon layer on the outside is 2.1, and the loss tangent is 3.4×10 -4 Thus, the dielectric constant of the dielectric layer decreases from the inside to the outside. Based on the selection of the materials of each dielectric layer of the lens 5, the operating frequency of the antenna is in the terahertz frequency band.

[0080] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0081] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0082] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other unless there is any conflict.

[0083] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. An antenna, characterized in that: include: Antenna body (1); A waveguide Butler (2) is connected to at least two input terminals (3) and at least two output terminals (4), each of the input terminals (3) is configured to be connected to a signal source, and the output terminals (4) are connected to the antenna body (1). The waveguide Butler (2) is configured to couple input signals from at least two of the input terminals (3) into one signal, and select one of the output terminals (4) to send to the antenna body (1).

2. The antenna according to claim 1, wherein The waveguide Butler (2) has four input ends (3), the amplitudes of the signals corresponding to the signal sources connected to the four input ends (3) are the same, and the phase difference between two adjacent input ends (3) is one of -135°, -45°, 45°, and 135°.

3. The antenna according to claim 2, wherein: The waveguide Butler (2) includes a first sub-segment (21), a second sub-segment (22), a third sub-segment (23) and a fourth sub-segment (24) connected in sequence along a first direction, the first sub-segment (21) is connected to the four input ends (3), the fourth sub-segment (24) is connected to the at least two output ends (4), the first sub-segment (21) is configured to phase shift and couple the signal, the second sub-segment (22) is configured to couple the signal, the third sub-segment (23) is configured to phase shift and couple the signal, and the fourth sub-segment (24) is configured to couple the signal.

4. The antenna according to claim 3, wherein: The four input terminals (3) include a first input terminal (31), a second input terminal (32), a third input terminal (33) and a fourth input terminal (34); the first sub-segment (21) includes a first phase shifter (211), a first coupler (212) and a second phase shifter (213) arranged at intervals along a second direction; the first phase shifter (211) is connected to the first input terminal (31); the first coupler (212) is connected to the second input terminal (32) and the third input terminal (33); the second phase shifter (213) is connected to the fourth input terminal (34); wherein the first coupler (212) is a cross coupler, and the second direction is arranged at an angle to the first direction.

5. The antenna according to claim 4, characterized in that The second sub-segment (22) comprises a second coupler (221) and a third coupler (222) arranged at intervals along the second direction, the second coupler (221) being connected to the first phase shifter (211) and the first coupler (212) for coupling the signal flowing through the first phase shifter (211) and the first coupler (212), and the third coupler (222) being connected to the second phase shifter (213) and the first coupler (212) for coupling the signal flowing through the second phase shifter (213) and the first coupler (212).

6. The antenna according to claim 5, characterized in that The third sub-segment (23) comprises a third phase shifter (231), a fourth coupler (232) and a fourth phase shifter (233) arranged at intervals along the second direction; the third phase shifter (231) is connected to the second coupler (221); the fourth coupler (232) is connected to the second coupler (221) and the third coupler (222); and the fourth phase shifter (233) is connected to the third coupler (222).

7. The antenna according to claim 6, characterized in that The fourth sub-segment (24) comprises a fifth coupler (241) and a sixth coupler (242) arranged at intervals along the second direction, the fifth coupler (241) being connected to the third phase shifter (231) and the fourth coupler (232), and the sixth coupler (242) being connected to the fourth coupler (232) and the fourth phase shifter (233), wherein the fifth coupler (241) is connected to two of the output terminals (4), and the sixth coupler (242) is connected to two of the output terminals (4).

8. The antenna according to any one of claims 1 to 7, characterized in that The antenna body (1) is a horn antenna, comprising a straight waveguide section (11) and a waveguide-to-horn section (12), wherein the straight waveguide section (11) is connected to the output end (4).

9. The antenna according to any one of claims 1 to 7, characterized in that The antenna further comprises: A lens (5) is provided at the radiation end of the antenna body (1) and is used to increase the antenna gain; The lens (5) comprises at least two dielectric layers, and the dielectric constants of the at least two dielectric layers decrease from the inside to the outside.

10. The antenna according to claim 9, characterized in that The lens (5) comprises a first dielectric layer (51), a second dielectric layer (52) and a third dielectric layer (53) which are sequentially arranged from the inside to the outside, wherein the first dielectric layer (51) is a cycloolefin polymer optical material layer, the second dielectric layer (52) is a polypropylene layer, and the third dielectric layer (53) is a Teflon layer.

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