WO2019119864A1

WO2019119864A1 - 2×4 broadband butler matrix plate, 2×4 broadband butler matrix, and multi-beam antenna

Info

Publication number: WO2019119864A1
Application number: PCT/CN2018/103010
Authority: WO
Inventors: 郑之伦; 李志龙
Original assignee: 京信通信系统（中国）有限公司; 京信通信技术(广州)有限公司; 京信通信系统（广州）有限公司; 天津京信通信系统有限公司
Priority date: 2017-12-20
Filing date: 2018-08-29
Publication date: 2019-06-27
Also published as: CN108110425A

Abstract

Disclosed are a 2×4 broadband Butler matrix plate, a 2×4 broadband Butler matrix, and a multi-beam antenna. The 2×4 broadband Butler matrix is in the structural form of a dielectric strip line formed by sequentially stacking an upper dielectric plate, a 2×4 broadband Butler matrix plate, and a lower dielectric plate in a metal cavity. The 2×4 broadband Butler matrix plate has two input ports and four output ports, and comprises a dielectric substrate as well as a directional coupler and a power divider provided on the dielectric substrate. The directional coupler has two input ends respectively serving as the input ports of the Butler matrix plate. The output ends of the directional coupler are respectively connected to the input ends of the power divider. The power divider has four output ends respectively serving as the output ports of the 2×4 broadband Butler matrix plate. The 2×4 broadband Butler matrix has a compact structure, small size, ease of assembly, low costs, and high performance.

Description

2×4 wideband Butler matrix board, Butler matrix and multi-beam antenna

Technical field

The present invention relates to the field of wireless communications, and in particular to a 2×4 wideband Butler matrix board, a 2×4 wideband Butler matrix, and a multi-beam antenna.

Background technique

With the rapid development of mobile communication, the rapid increase of mobile communication traffic and the contradiction of limited spectrum resources, multi-beam antenna technology enables conventional single fans because it can form multiple high-gain narrow beams on the antenna array. The zone cracking becomes a multiple sector coverage, expanding system capacity and increasing coverage distance, and is widely used in the field of wireless communication.

Each beam formed by the Butler matrix can obtain full-scale gain and is a key component of the multi-beam antenna. However, the prior art Butler matrix has a narrow frequency band and a large size. In order to meet the requirements of miniaturization, wide frequency, low cost, and high performance of the antenna, it is necessary to further improve the prior art.

Summary of the invention

It is an object of the present invention to provide a 2 x 4 wideband Butler matrix board.

At the same time, the present invention also provides a 2x4 wideband Butler matrix to which the 2x4 wideband Butler matrix board is applied. The 2×4 wideband Butler matrix is advantageous for achieving antenna miniaturization, wide frequency, low cost, and high performance.

Furthermore, the present invention also provides a multi-beam antenna to which the 2 x 4 wideband Butler matrix is applied.

In order to achieve the above object, the present invention provides the following technical solutions:

A 2×4 wideband Butler matrix board having two input ports and four output ports, the 2×4 broadband Butler matrix board comprising a dielectric substrate and a directional coupler and a power divider disposed on the dielectric substrate The directional coupler has two input ends respectively as input ports of the 2×4 broadband Butler matrix board, and an output end of the directional coupler is respectively connected to an input end of the power splitter. The power splitter has four outputs, which respectively serve as output ports of the 2×4 broadband Butler matrix board; when an electrical signal is input from any one of the directional couplers, the splitter is The output ratio of each output is 1:N:N:1, where N is a constant greater than 1.

Specifically, the directional coupler is a 3dB directional coupler, and the directional coupler is a single-stage wide-side coupled line directional coupler or a cascaded wide-side coupled line directional coupler.

Specifically, the power splitter includes a first power splitter connected to an output end of the directional coupler and a second power splitter connected to another output end of the directional coupler, the first power splitter The second power splitter is a two-way splitter, and the power split ratio of each of the two outputs is 1:N.

Specifically, the first power splitter and the second power splitter each include a coupler having an input end, an isolated end, and two output ends, a fixed phase shifter connected to an output end of the coupler, and a coupling a phase adapter coupled to the other output of the device, a matching load coupled to the isolated end, and a first open stub connected to the matched load; the first splitter and the second splitter The input ends are the input ends of the coupler, and the two output ends of the first power splitter and the second power splitter are the output ends of the fixed phase shifter and the phase adapter The output.

Specifically, the couplers in the first power splitter and the second power splitter are both wide-side coupled line directional couplers.

Specifically, the directional coupler includes a first transmission line and a second transmission line, and the first transmission line and the second transmission line are respectively disposed on upper and lower layers of the dielectric substrate;

The coupler, the fixed phase shifter, the phase adjuster and the matching load of the first power splitter and the second power splitter are respectively disposed on upper and lower layers of the dielectric substrate.

Specifically, an input port and an output port of the Barrett matrix board corresponding to the input end and the output end of each component of the lower layer of the dielectric substrate are provided with a connection conductor on an upper layer of the dielectric substrate, and the medium is located in the medium An input end and an output end of each component of the lower layer of the substrate are connected to the connecting conductor via a metallized via.

Specifically, the fixed phase shifter is a 50 Ω transmission line that is disposed on the dielectric substrate in a plurality of stages of bending.

Specifically, the phase adapter is composed of three transmission lines connected in series, two second open branches connected to the intermediate transmission line and connected in parallel with each other, wherein the second open branch has a length of λ/2, and λ is the center. The wavelength of the frequency.

Further, the power output of the four output ends of the power splitter is 1:5:5:1.

In the meantime, the present invention provides a 2×4 wideband Butler matrix using the 2×4 broadband Butler matrix board, which comprises a metal cavity, which are respectively disposed in the metal cavity and sequentially stacked upper dielectric plates, the above 2 ×4 broadband Butler matrix board and lower dielectric board;

The metal cavity is provided with two input ports and four output ports as input ports and output ports of a 2×4 wideband Butler matrix, and two input ports of the 2×4 broadband Butler matrix board and The four output ports are connected one by one.

Furthermore, the present invention also provides a multi-beam antenna comprising an antenna array and a 2x4 wideband Butler matrix connected to the antenna array, the 2x4 wideband Butler matrix being the 2x4 wideband Butler described above matrix.

Specifically, two of the output ports of the 2×4 wideband Butler matrix are directly connected to the antenna array, and the other two output ports are connected to the antenna array via a 180° fixed phase shifter, so that the 2×4 broadband Butler In the antenna array connected to the four output ports of the matrix, signals such as signals between adjacent antenna arrays are outputted with a phase difference.

Compared with the prior art, the solution of the invention has the following advantages:

1. In the technical solution of the present invention, the 2×4 broadband Butler matrix board integrates the directional coupler and the power splitter onto a dielectric substrate, and has compact structure, small size, easy assembly, and low cost. .

2. In the technical solution of the present invention, the 2×4 broadband Butler matrix board designs the directional coupler as a single-stage wide-side coupled line directional coupler or a cascaded wide-side coupled line directional coupler, The novel design realizes the power splitter, which has the advantages of small size, frequency bandwidth, flexible power distribution, low standing wave, small loss, high isolation and the like.

3. In the technical solution of the present invention, the 2×4 broadband Butler matrix is formed by sequentially laminating a lower dielectric plate, a 2×4 broadband Butler matrix plate, and upper and lower dielectric plates in a metal cavity to form a dielectric strip line. The structure, the welding is convenient and reliable, and the passive intermodulation is low, which is beneficial to improve production efficiency.

The additional aspects and advantages of the invention will be set forth in part in the description which follows.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic structural view of an embodiment of a 2×4 wideband Butler matrix board according to the present invention;

2 is a structural exploded view of a portion of the structure of FIG. 1, mainly showing the structural composition of a first power splitter in a 2×4 wideband Butler matrix board;

3 is a schematic structural view of an embodiment of a 2×4 wideband Butler matrix according to the present invention;

4 is a diagram showing simulation results of return loss of a first input terminal and a second input terminal of an embodiment of a 2×4 wideband Butler matrix according to the present invention;

5 is a diagram showing simulation results of isolation of a first input end and a second input end of an embodiment of a 2×4 wideband Butler matrix according to the present invention;

6 is a diagram showing amplitude simulation results of a first input end to an output end of an embodiment of a 2×4 wide frequency Butler matrix according to the present invention;

7 is a diagram showing amplitude simulation results of a second input end to an output end of an embodiment of a 2×4 wide frequency Butler matrix according to the present invention;

8 is a diagram showing simulation results of insertion loss when a first input terminal is fed by an embodiment of a 2×4 wideband Butler matrix according to the present invention;

FIG. 9 is a diagram showing simulation results of insertion loss when a second input terminal is fed by an embodiment of a 2×4 wideband Butler matrix according to the present invention; FIG.

10 is a diagram showing a simulation result of a relative transmission phase of a first input end to an output end of an embodiment of a 2×4 wideband Butler matrix according to the present invention;

11 is a diagram showing a simulation result of a relative transmission phase of a second input end to an output end of an embodiment of a 2×4 wideband Butler matrix according to the present invention;

12 is a schematic structural diagram of an embodiment of a multi-beam antenna according to the present invention;

FIG. 13 is a schematic structural diagram of another embodiment of a multi-beam antenna according to the present invention.

Detailed ways

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

As shown in Figure 1, an embodiment of a 2 x 4 wideband Butler matrix board in accordance with the present invention is provided. The 2×4 broadband Butler matrix board 100 is a two-layer circuit design in which the physical part is the upper layer line and the shaded part is the lower layer line.

The 2x4 wideband Butler matrix board 100 has two input ports and four output ports. The 2×4 broadband Butler matrix board 100 includes a dielectric substrate 101 and a directional coupler 1 and a power splitter 2 disposed on the dielectric substrate 101.

The directional coupler 1 has two input ends, a first input end 10 and a second input end 11, respectively, as input ports of the 2×4 broadband Butler matrix board 100, and the output end of the directional coupler 1 is The input terminals of the power splitter 2 are connected.

The power splitter 2 has four outputs of a first output terminal 20, a second output terminal 21, a third output terminal 22, and a fourth output terminal 23, which are respectively used as the 2×4 broadband Butler matrix board 100. Output port.

When the electrical signal is input from any one of the input terminals of the directional coupler 1, the first output terminal 20, the second output terminal 21, the third output terminal 22, and the fourth output terminal 23 of the power divider 2 respectively output The power ratio is 1:N:N:1, where N is a constant greater than one.

In the present invention, by integrating the directional coupler 1 and the power splitter 2 on a dielectric substrate, the structure is compact, which is advantageous for reducing the volume, saving materials, and reducing loss, and has the characteristics of wide frequency, low cost, and high performance.

Specifically, the directional coupler 1 is a 3dB directional coupler having two outputs of a first output terminal 12 and a second output terminal 13. The two output ends of the directional coupler 1 have a phase difference of 90°, and the two outputs are equal power outputs. As mentioned above, the directional coupler 1 has two inputs: a first input 10 and a second input 11, which when the first input 10 or the second input 11 is fed The outputs of the two output ends of one output terminal 12 and the second output terminal 13 are 90° out of phase, and the two output terminals are equal power outputs.

Further, the directional coupler 1 is a single-stage wide-side coupled line directional coupler or a cascaded wide-side coupled line directional coupler. This embodiment adopts a cascade-type wide-side coupled line directional coupler, which is advantageous for better. The equal power output of the two outputs of the directional coupler 1 in the wide frequency is realized.

Specifically, the power splitter 2 includes a first power splitter 24 connected to the first output end 12 of the directional coupler 1 and a second output end 13 connected to the directional coupler 1 The second power divider 25. The first power splitter 24 and the second power splitter 25 are both a splitter and a splitter. The respective power output ratios of the respective two output ends of the first power splitter 24 and the second power splitter 25 are 1:N, where N is a constant greater than one. In an embodiment of the present invention, a power division ratio between the first output terminal 20 and the third output terminal 22 of the first power divider 24 is 1:N, and the second power divider A power division ratio between the second output terminal 21 and the fourth output terminal 23 of 25 is N:1.

The phase between the two output ends of the first power splitter 24 and the two output ends of the second power splitter 25 are 90° out of phase. The first output terminal 20 and the third output terminal 22 are output in phase, and the second output terminal 21 and the fourth output terminal 23 are output in phase.

Specifically, the first power splitter 24 and the second power splitter 25 have the same principle, and the two belong to the same power splitter. The following is an example of the structure of the first power splitter 24:

Referring to FIG. 2, the first power splitter 24 includes a coupler 27 having an input end (not labeled, the same below), an isolated end 26 and two output ends, and a fixed shift connected to an output end 270 of the coupler 27. The phaser 28 has a phase adapter 29 connected to the other output 271 of the coupler 27, a matching load 3 connected to the isolated terminal 26, and a first open branch 4 connected to the matching load 3. The input end of the first power splitter 24 is an input end of the coupler 27, and the two output ends of the first power splitter 24 are respectively an output end of the fixed phase shifter 28 and the phase The output of the adapter 29.

Preferably, the coupler 27 in the first power splitter 24 is a wide-side coupled line directional coupler. The coupler 27 is preferably a wide-side coupled line directional coupler that can be changed by adjusting the coincident portion of its wide-side coupled line such that the power split ratio between the two outputs of the coupler 27 is one. :N. At the same time, the isolated end 26 of the coupler 27 sequentially connects the matching load 3 and the first open stub 4 to obtain a good matching impedance for absorbing unnecessary reflected signals, thereby increasing the amplitude flatness of the output of the coupler 27. .

Wherein, when the input end of the coupler 27 is fed, the difference between the phases of one output end 270 and the other output end 271 of the coupler 27 is 90°. The fixed phase shifter 28 on the first power splitter 24 compensates the phase and phase adjuster 29 to adjust the frequency characteristics of the transmission line phase, and can realize the equal phase output of the two outputs of the first power splitter 24 in the wide frequency, thereby eliminating the coupling. The phase difference caused by the device 27. Similarly, when the input end of the coupler on the second power splitter 25 is fed, the second work can also be implemented by the fixed phase shifter and the phase adjuster on the second splitter 25. The two outputs of the divider 25 are output in an equal phase within the wide frequency band.

In order to realize a more reasonable and more compact structure of the 2×4 broadband Butler matrix board 100 in the present invention, the directional coupler 1 and the power splitter 2 are disposed on the upper and lower layers of the dielectric substrate 101, wherein The directional coupler 1 includes a first transmission line 1010 and a second transmission line 1020. The first transmission line 1010 and the second transmission line 1020 are disposed on the upper and lower layers of the dielectric substrate 101 (the upper part of the solid layer and the lower layer of the shadow part) The coupler, the fixed phase shifter, the phase adapter, the matching load, and the first open branch 4 of the first power splitter 24 and the second power splitter 25 are respectively disposed on the upper and lower sides of the dielectric substrate. Floor. In the present embodiment, taking the first power splitter 24 as an example, the coupler 27 and the phase adjuster 29 of the first power splitter 24 are placed on the upper layer of the dielectric substrate 101, and the fixed phase shifter 28 The first open branch 4 and the matching load 3 are placed on the lower layer of the dielectric substrate 101.

The directional coupler 1, the first splitter 24, and the second splitter 25 are disposed on the upper and lower layers of the dielectric substrate 101, in order to implement the 2×4 broadband Butler matrix board. The input port and the output port of 100 are respectively disposed on an upper layer of the dielectric substrate 101, and further, the input and output ends of the components of the lower layer of the dielectric substrate correspond to the Barrett matrix board 100 The input port and the output port are each provided with a connection conductor 1040 on the upper layer of the dielectric substrate 101, and the input end and the output end of each component located under the dielectric substrate 101 are connected to the connection conductor 1040 via a metallization via 1030. In this embodiment, taking the first power splitter 24 as an example, the first output end 20 of the first power splitter 24 is originally located in the lower layer of the dielectric substrate 101, and the connection conductor 1040 is disposed on the upper layer of the dielectric substrate 101. The first output end 20 is connected to the connecting conductor 1040 via a metallized via 1030, so that the signal of the output port of the 2×4 broadband Butler matrix board corresponding to the first output end 20 can be on the upper layer of the dielectric substrate 101. Output.

Preferably, the fixed phase shifter 28 is a 50 Ω transmission line which is provided on the dielectric substrate 101 in a plurality of stages of bending.

Preferably, the phase adapter 29 is composed of three serially connected transmission lines, two second open branches 290 each connected to the intermediate transmission line and connected in parallel with each other, wherein the second open branch 290 has a length of λ/2 ( λ is the wavelength of the center frequency). The transmission line is used to achieve impedance matching, and the open branch 290 is used to adjust the frequency characteristics of the transmission line phase.

By adjusting the length of the transmission line of the fixed phase shifter 28 in the first power divider 24 and the length and width of each of the transmission lines of the phase adapter 29, the two output ports of the first power divider 24 (ie, the first The output 20 and the third output 22) are equal in phase at the operating frequency with an error of ±3°. Similarly, the two output ports of the second power splitter 25 (ie, the second output terminal 21 and the fourth output terminal 23) can be controlled to have equal phases within the operating frequency with an error within ±3°.

As shown in FIG. 3, the present invention further provides a 2×4 broadband Butler matrix 200, which includes a metal cavity 201, and an upper dielectric plate 203 which is disposed in the metal cavity 201 and sequentially stacked. The 2×4 broadband Butler matrix board 100 and the lower dielectric board 202 are provided.

The metal cavity 201 is provided with two input ports and four output ports, which are connected in one-to-one correspondence with two input ports and four output ports of the 2×4 broadband Butler matrix board 100.

It can be understood that the input port and the output port of the metal cavity 201 serve as input ports and output ports of the 2×4 wideband Butler matrix 200. Specifically, the first input port and the second input port of the 2×4 broadband Butler matrix board 100 are the first input port P1, the second input port P2, and the 2×4 broadband of the 2×4 broadband Butler matrix 200. The first output port, the second output port, the third output port, and the fourth output port of the Butler matrix board 100 are the first output port O1 and the second output port O2 of the 2×4 broadband Butler matrix 200. Three output ports O3 and fourth output ports O4.

4 to FIG. 11 are simulation results of a 2×4 wideband Butler matrix according to an embodiment of the present invention. The operating frequency is 1710 to 2690 MHz, and the design power division ratio of the four output ports is 1:5:5:1. It can be seen that the return loss of the first input port P1 and the second input port P2 of the 2×4 broadband Butler matrix 200 is less than -27 dB, and the isolation is less than -25 dB when the 2×4 wide band from the 2×4 When the first input port P1 of the Le matrix 200 is fed, the insertion loss is less than 0.3 dB, and the amplitudes of the first output port O1 and the fourth output port O4 of the 2×4 broadband Butler matrix 200 are within -11.5±0.45 dB. The amplitudes of the second output port O2 and the third output port O3 are within -3.8±0.2 dB, and the phase errors of the first output port O1 and the fourth output port O4 are within ±3°; when from the 2×4 wide band Bart When the second input port P2 of the Le matrix 200 is fed, the insertion loss is less than 0.3 dB, and the amplitudes of the first output port O1 and the fourth output port O4 of the 2×4 broadband Butler matrix 200 are within -11.6±0.5 dB. The amplitude of the second output port O2 and the third output port O3 is within -3.8±0.2 dB, and the first output port O1 and the fourth output Port O4 phase error is within ± 3 °.

The 2×4 broadband Butler matrix 200 is sequentially stacked in a metal cavity 201 to form a dielectric strip line by using an upper dielectric plate 203, a 2×4 broadband Butler matrix plate 100, and an underlying dielectric plate 202, and has a structure. Compact, small size, easy to assemble, low cost, low frequency band, low standing wave, low loss, high isolation, flexible power distribution, high amplitude flatness, low passive intermodulation, etc. Provide technical support for low cost and high performance.

Further, the power division ratio of the output port of the 2×4 wideband Butler matrix 200 of the present invention can be realized by adjusting the design of the first power splitter 24 and the second power splitter 25, and the magnitude of the large power division ratio can be obtained. Distribution to meet the low sidelobe requirements of the antenna.

Moreover, the present invention also provides a multi-beam antenna 300 comprising the 2 x 4 wideband Butler matrix 200 described above.

The two output ports of the metal cavity 201 of the 2×4 broadband Butler matrix 200 are directly connected to the antenna array, and the other two output ports are connected to the antenna array via a 180° fixed phase shifter to make the metal cavity In the antenna array in which the four output ports of the body 201 are connected, a phase difference signal such as a signal between adjacent antenna arrays is output.

As shown in FIG. 12, in the application scenario of a multi-beam antenna 300 of the present invention, the 2×4 wideband Butler matrix 200 is placed in an antenna array. Taking a 3dB directional coupler as an example of a cascading wide-side coupled line directional coupler, in one case, the first output port O1 and the second output port O2 of the 2×4 wideband Butler matrix 200 are directly connected to the antenna array. The third output port O3 and the fourth output port O4 of the 2×4 broadband Butler matrix 200 are respectively connected to a 180° fixed phase shifter, and then respectively connected to the antenna array, when the pair of 2×4 broadband Butler matrix 200 When the first input port P1 is fed, the relative phases of the first output port to the fourth output port are 0°, 90°, 0°, and 90°, respectively, and the relative phases of the corresponding antenna arrays are respectively 0°. 90°, 180°, 270°; when the second input port P2 of the 2×4 broadband Butler matrix 200 is fed, the relative phases of the first output port to the fourth output port are 0° and −90 respectively °, 0°, -90°, the relative phase of the corresponding antenna array is 0°, -90°, -180°, -270°, respectively.

As shown in FIG. 13, in another application scenario of a multi-beam antenna 300 of the present invention, the second output port O2 and the third output port O3 of the 2×4 wideband Butler matrix 200 and the antenna array are shown. The first output port O1 and the fourth output port O4 of the 2×4 broadband Butler matrix 200 are respectively connected to a 180° fixed phase shifter, and are respectively connected to the antenna array. When the first input port P1 of the 2×4 broadband Butler matrix 200 is fed, the relative phases of the first to fourth output ports of the 2×4 broadband Butler matrix 200 are respectively 0°. 90°, 0°, 90°, the corresponding phase correspondences of the multi-beam antenna arrays are 0°, −90°, -180°, -270°, respectively; when the 2×4 broadband Butler matrix is 200 When the second input port feeds P2, the relative phases of the first to fourth output ports of the 2×4 broadband Butler matrix 200 are 0°, −90°, 0°, and −90°, respectively. The relative phases of the corresponding antenna arrays are 0°, 90°, 180°, and 270°, respectively.

The above is only a part of the embodiments of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims

A 2×4 broadband Butler matrix board having two input ports and four output ports, comprising: a dielectric substrate and a directional coupler and a power splitter disposed on the dielectric substrate; the directional coupling The device has two input terminals respectively as input ports of the 2×4 broadband Butler matrix board, and an output end of the directional coupler is connected to an input end of the power splitter, and the power splitter has four An output end, which serves as an output port of the 2×4 broadband Butler matrix board, respectively;

When an electrical signal is input from any one of the input terminals of the directional coupler, a power ratio outputted at each of the four output terminals of the power splitter is 1:N:N:1, where N is a constant greater than one.
The 2×4 wideband Butler matrix board according to claim 1, wherein the directional coupler is a 3dB directional coupler, and the directional coupler is a single-stage wide-side coupled line directional coupler or cascaded Wide-side coupled line directional coupler.
The 2×4 wideband Butler matrix board according to claim 1, wherein said power splitter comprises a first power splitter coupled to an output of said directional coupler and said directional coupler The other power splitter connected to the other output terminal, the first power splitter and the second power splitter are both a splitter and a splitter, and the power split ratio of each of the two outputs is 1:N.
The 2×4 wideband Butler matrix board according to claim 3, wherein the first power splitter and the second power splitter each include a coupler having an input end, an isolated end, and two output ends. a fixed phase shifter coupled to an output of the coupler, a phase modulator coupled to the other output of the coupler, a matching load coupled to the isolated end, and a first open stub coupled to the matched load An input end of the first power splitter and the second power splitter is an input end of the coupler, and two output ends of the first power splitter and the second power splitter Both are the output of the fixed phase shifter and the output of the phase modulator.
The 2×4 wideband Butler matrix board according to claim 4, wherein said couplers in said first power splitter and said second power splitter are wide-side coupled line directional couplers .
The 2×4 broadband Butler matrix board according to claim 4, wherein the directional coupler comprises a first transmission line and a second transmission line, and the first transmission line and the second transmission line are disposed on the dielectric substrate. Up and down two floors;

The coupler, the fixed phase shifter, the phase adjuster and the matching load of the first power splitter and the second power splitter are respectively disposed on upper and lower layers of the dielectric substrate.
The 2×4 wideband Butler matrix board according to claim 6, wherein the 2×4 wide-band Barrett matrix board corresponding to the input end and the output end of each component of the lower layer of the dielectric substrate The input port and the output port are each provided with a connection conductor on the upper layer of the dielectric substrate, and the input end and the output end of each component located under the dielectric substrate are connected to the connection conductor via a metallized via.
The 2×4 wideband Butler matrix board according to claim 4, wherein the fixed phase shifter is a 50 Ω transmission line which is provided on the dielectric substrate in a plurality of stages of bending.
The 2×4 wideband Butler matrix board according to claim 4, wherein the phase adapter is composed of three serially connected transmission lines, two second open branches connected to the middle section of the transmission line and connected in parallel with each other. Wherein, the length of the second open branch is λ/2, and λ is the wavelength of the center frequency.
The 2×4 wideband Butler matrix board according to any one of claims 1-9, wherein the power output of the four output terminals of the power splitter respectively outputs 1:5:5:1.
A 2×4 broadband Butler matrix, characterized in that it comprises a metal cavity, an upper dielectric plate which is disposed in the metal cavity and is sequentially stacked, and a 2×4 broadband according to any one of claims 1 to 10. Butler matrix board and lower dielectric board;

The metal cavity is provided with two input ports and four output ports as input ports and output ports of a 2×4 wideband Butler matrix, and two input ports of the 2×4 broadband Butler matrix board and The four output ports are connected one by one.
A multi-beam antenna comprising an antenna array and a 2x4 wideband Butler matrix coupled to the antenna array, wherein the 2x4 wideband Butler matrix is the 2x4 wideband bart of claim 11. Le matrix.
The multi-beam antenna according to claim 12, wherein two of the output ports of the 2×4 wideband Butler matrix are directly connected to the antenna array, and the other two output ports are connected to the antenna via a 180° fixed phase shifter. The array is such that a phase difference between signals of adjacent antenna arrays is output in an antenna array in which four output ports of the 2×4 broadband Butler matrix are connected.