A multi-channel polarization coupler

Abstract

This application relates to the technical field of communication devices, and particularly to a multi-channel polarization coupler, which includes a cavity. A plurality of parallelly arranged mounting grooves are formed inside the cavity. A dielectric substrate, a bridge plate, and a coupling plate are sequentially stacked from top to bottom inside the mounting groove. The coupling plate is disposed at the top of the bottom of the mounting groove, and a power dividing plate is further disposed at the bottom of the bottom of the mounting groove. The bridge plate is provided with a strip line bridge circuit, the coupling plate is provided with a strip line coupling circuit and a strip line through circuit, and the power dividing plate is provided with a microstrip line power dividing circuit. The strip line bridge circuit is respectively connected to the strip line coupling circuit and the strip line through circuit, and the strip line coupling circuit is connected to the microstrip line power dividing circuit. This application adopts an integrated structure and a multi-channel combined design, which not only effectively saves space, but also integrates the functions of polarization coupling components, realizing a design of miniaturization, high performance, and high integration degree.

Description

Technical Field

[0001] This application relates to the technical field of communication devices, and particularly to a multi-channel polarization coupler. Background Art

[0002] Polarizers and couplers are important components of a new type of large early warning radar antenna array, featuring high power handling capacity, high polarization coupling accuracy, and strong reliability. To meet the system function requirements of the entire radar, the traditional design approach is to design polarizers and couplers independently. When the products of this solution are connected to the system, cable assemblies need to be added for signal transmission, and a large enough space is required to install a large number of independent components. As a result, a series of problems arise, such as large occupied volume, high power loss, relatively large phase shift error, and reduced reliability, which cannot meet the performance requirements of the new generation of radar systems. Summary of the Invention

[0003] To solve the above problems, this application provides a multi-channel polarization coupler to solve one or more technical problems existing in the prior art and at least provide a beneficial alternative or create conditions.

[0004] To achieve the above objective, this application provides a multi-channel polarization coupler, including a cavity. A plurality of parallel arranged mounting grooves are formed inside the cavity. A dielectric substrate, a bridge board, and a coupling board are sequentially stacked from top to bottom inside the mounting groove. The coupling board is disposed on the top of the bottom of the mounting groove, and a power divider board is further disposed at the bottom of the bottom of the mounting groove.

[0005] The bridge board is provided with a stripline bridge circuit, the coupling board is provided with a stripline coupling circuit and a stripline through circuit, and the power divider board is provided with a microstrip line power divider circuit.

[0006] The stripline bridge circuit is respectively connected to the stripline coupling circuit and the stripline through circuit, and the stripline coupling circuit is connected to the microstrip line power divider circuit.

[0007] Further, the multi-channel polarization coupler further includes an upper cover plate and a lower cover plate. The upper cover plate is connected to the top end of the cavity, and the lower cover plate is connected to the bottom end of the cavity. The upper cover plate and the lower cover plate seal the plurality of mounting grooves, and the power divider board is disposed in the space formed by the lower cover plate and the bottom of the mounting groove.

[0008] Further, a pair of input feed connectors are provided on the front slot plate of the mounting groove, and a pair of output feed connectors are provided on the rear slot plate; a main path feed connector is provided on one side of the cavity.

[0009] The input end of the power divider circuit is connected to the main path feeding joint, and the output ends of the power divider circuit are respectively and correspondingly connected to the coupling ends of each coupling circuit; the two input ends of the bridge circuit are respectively and correspondingly connected to a pair of input feeding joints, and the two output ends of the bridge circuit are respectively and correspondingly connected to the input end of the coupling circuit and the input end of the direct-through circuit; the output ends of the coupling circuit and the direct-through circuit are respectively and correspondingly connected to a pair of output feeding joints.

[0010] Further, a pressing block is also arranged at the top end of the dielectric substrate. The coupling plate, the bridge plate, the dielectric substrate, the power divider plate and the pressing block are all provided with screw holes, and the coupling plate, the bridge plate, the dielectric substrate, the power divider plate and the pressing block are fixedly connected to the bottom of the groove through the screw holes.

[0011] Further, both the cavity and the pressing block are made of metal conductor materials.

[0012] Further, a through hole is arranged between the coupling plate and the power divider plate, a wave bead is arranged in the through hole, and the output end of the power divider circuit is connected to the coupling end of the coupling circuit through the wave bead.

[0013] Further, the strip line bridge circuit is in an arch shape.

[0014] Further, the dielectric constant of the power divider plate is 2 - 6, and the thickness is 0.5 - 1.5 mm; the dielectric constant of the coupling plate is 2 - 4, and the thickness is 1.0 - 2 mm; the dielectric constant of the bridge plate is 2 - 4, and the thickness is 0.2 - 0.5 mm; the dielectric constant of the dielectric substrate is 2 - 4, and the thickness is 1.0 - 2 mm.

[0015] The beneficial effects of the present application are as follows: The present application provides a multi-channel polarization coupler. By reasonably improving the structure of the cavity, reasonably arranging the power divider plate, the coupling plate, the bridge plate and the dielectric substrate, adopting an integrated structure and a multi-channel combination design, it not only effectively saves space, but also integrates the functions of the polarization coupling components. It greatly reduces the volume occupied by it in the whole machine system, and realizes the design of miniaturization, high performance and high integration. The multi-channel polarization coupler provided by the present application can improve the system function of the radar whole machine and can be widely applied to the miniaturized radar monitoring system. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the multi-channel polarization coupler in the embodiment of the present application;

[0018] Figure 2 For the present application Figure 1 It is a schematic diagram of the internal structure at position A in the present application;

[0019] Figure 3 It is a schematic diagram of the bottom structure of the multi-channel polarization coupler in the embodiment of the present application;

[0020] Figure 4 It is a schematic cross-sectional view of the multi-channel polarization coupler in the embodiment of the present application;

[0021] Figure 5 It is a schematic diagram of the power splitting board in the embodiment of the present application;

[0022] Figure 6 It is a schematic diagram of the coupling board in the embodiment of the present application;

[0023] Figure 7 It is a schematic diagram of the bridge board in the embodiment of the present application.

[0024] Description of reference numerals:

[0025] 10. Cavity; 100. Installation groove; 110. Dielectric substrate; 120. Bridge board; 121. Stripline bridge circuit; 121in. Input end of the bridge circuit; 121out. Output end of the bridge circuit; 130. Coupling board; 131. Stripline coupling circuit; 131in. Input end of the coupling circuit; 131out. Output end of the coupling circuit; 131cp. Coupling end of the coupling circuit; 132. Stripline through circuit; 132in. Input end of the through circuit; 132out. Output end of the through circuit; 140. Power splitting board; 141. Microstrip line power splitting circuit; 141in. Input end of the power splitting circuit; 141out. Output end of the power splitting circuit; 200. Upper cover plate; 300. Lower cover plate; 400. Pressing block; 151. Input feed connector; 152. Output feed connector; 153. Main path feed connector; 500. Through hole. Detailed implementation manners

[0026] This part will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0027] In the description of the present application, it should be understood that when it comes to orientation descriptions, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., it is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0028] In the description of the present application, if there are vocabulary descriptions such as "several", its meaning is one or more, and the meaning of multiple is more than two paths. Understanding greater than, less than, exceeding, etc. does not include the base number, and understanding above, below, within, etc. includes the base number. If there is a description of first and second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features. In the description of the present application, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0029] Refer to Figures 1 to 7 As shown in the figure, a multi-path polarization coupler provided by the present application includes a cavity 10. A plurality of parallelly arranged mounting grooves 100 are formed inside the cavity 10. A dielectric substrate 110, a bridge plate 120, and a coupling plate 130 are sequentially stacked from top to bottom inside the mounting groove 100. The coupling plate 130 is disposed at the top of the bottom of the mounting groove 100, and a power dividing plate 140 is further disposed at the bottom of the bottom of the mounting groove 100.

[0030] The bridge plate 120 is provided with a stripline bridge circuit 121, the coupling plate 130 is provided with a stripline coupling circuit 131 and a stripline through circuit 132, and the power dividing plate 140 is provided with a microstrip line power dividing circuit 141.

[0031] The stripline bridge circuit 121 is respectively connected to the stripline coupling circuit 131 and the stripline through circuit 132, and the stripline coupling circuit 131 is connected to the microstrip line power dividing circuit 141.

[0032] It can be seen that in the multi-path polarization coupler described in the present application, one polarization coupler is formed in one mounting groove 100. By expanding the number of mounting grooves 100 and adaptively expanding the number of output ends of the power dividing circuit, a polarization coupler with the required number of paths can be formed.

[0033] Refer to Figure 5, in some embodiments, the microstrip power divider circuit 141 is a multi-stage two-way power divider circuit, and the number of the mounting grooves 100 is an even number; for example, the number of cavities of the mounting grooves 100 in the cavity 10 is 2 to 16, and 4 to 32 radar signals can be provided respectively.

[0034] Compared with the prior art, the multi-way polarization coupler provided by the present application adopts a stacked structure and a multi-way signal simultaneous transmission method to achieve miniaturization design, which not only reduces the volume of the component, but also reduces the number of components, and has excellent electrical performance, greatly reducing the space of the radar whole machine, reducing the cost, and improving the overall performance of the radar. In this embodiment, the cavity 10 is a long-strip multi-cavity 10 parallel arrangement structure, and each mounting groove 100 corresponds to a polarization coupler.

[0035] Combined with Figure 1 , Figure 3 and Figure 4 , in some embodiments, the multi-way polarization coupler further includes an upper cover plate 200 and a lower cover plate 300. The upper cover plate 200 is connected to the top end of the cavity 10, and the lower cover plate 300 is connected to the bottom end of the cavity 10. The upper cover plate 200 and the lower cover plate 300 seal the plurality of mounting grooves 100, and the power divider board 140 is disposed in the space formed by the lower cover plate 300 and the bottom of the mounting groove 100.

[0036] In this embodiment, the lower cover plate 300, the power divider board 140, the cavity 10, the coupling board 130, the bridge board 120, the dielectric substrate 110, the pressing block 400 and the upper cover plate 200 form an eight-layer combined structure; during assembly, first install the power divider board 140 on the lower side of the cavity 10, and sequentially install the coupling board 130, the bridge board 120, the dielectric substrate 110, and the pressing block 400 on the upper side of the cavity 10. Install connectors on the front and rear sides. After debugging is completed, install the upper cover plate 200 and the lower cover plate 300 on the topmost layer and the bottommost layer of the cavity 10 respectively, and the multi-way polarization coupler described in the present application is completed.

[0037] Combined with Figure 5 , Figure 6 and Figure 7 , in some embodiments, a pair of input feeding joints 151 are provided on the front slot plate of the mounting groove 100, and a pair of output feeding joints 152 are provided on the rear slot plate; a main path feeding joint 153 is provided on one side of the cavity 10.

[0038] The input end 141in of the power divider circuit is connected to the main path feeding joint 153, and the output ends 141out of the power divider circuit are respectively and correspondingly connected to the coupling ends 131cp of each coupling circuit; the two input ends 121in of the bridge circuit are respectively and correspondingly connected to a pair of input feeding joints 151, and the two output ends 121out of the bridge circuit are respectively and correspondingly connected to the input end 131in of the coupling circuit and the input end 132in of the direct-through circuit; the output ends 131out of the coupling circuit and the output ends 132out of the direct-through circuit are respectively and correspondingly connected to a pair of output feeding joints 152.

[0039] The working principle is as follows: The multi-channel polarization coupler provided in this application is an integrated component of a multi-channel polarizer and a coupler. The polarizer (i.e., the bridge circuit) is implemented by a 3dB bridge. The working principle of a single-channel polarization coupler is: When the radar receives a signal from the outside, the signal first enters the bridge board 120 through the connector. After the bridge board 120 polarizes the signal, it outputs the signal in two paths. The two output signals have a 90-degree phase difference within the frequency band. One of the signals is directly used as the output signal of the multi-channel polarization coupler and is output through the output feeding joint 152. The other signal enters the strip line coupling circuit 131 on the coupling board 130, and the coupling signal is output to the microstrip line power divider circuit 141 on the power divider board 140 through the coupling end 131cp of the coupling circuit, and then enters the main path feeding joint 153 through the microstrip line power divider circuit 141.

[0040] In some embodiments, a pressing block 400 is further provided at the top of the dielectric substrate 110. The coupling board 130, the bridge board 120, the dielectric substrate 110, the power divider board 140, and the pressing block 400 are all provided with screw holes, and the coupling board 130, the bridge board 120, the dielectric substrate 110, the power divider board 140, and the pressing block 400 are fixedly connected to the bottom of the groove through the screw holes.

[0041] The pressing block 400 can squeeze the dielectric substrate 110, the bridge board 120, and the coupling board 130 stacked together to strengthen the electrical connection between the strip lines and improve the electrical performance of the multi-channel polarization coupler; at the same time, the metal material is also convenient for heat dissipation.

[0042] In some embodiments, the cavity 10 and the pressing block 400 are both made of metal conductor materials.

[0043] In some embodiments, a through hole 500 is provided between the coupling board 130 and the power divider board 140. A wave bead is provided in the through hole 500, and the output end 141out of the power divider circuit is connected to the coupling end 131cp of the coupling circuit through the wave bead.

[0044] It should be noted that the bead is used for electrical connection and to achieve electromagnetic performance consistent with that of the strip line. For example, it realizes the connection function of a 50Ω strip line. In this embodiment, a bead is provided in the through hole 500 to connect the signals of the coupling plate 130 and the power splitter plate 140 provided at the upper and lower ends of the groove bottom.

[0045] In some embodiments, the strip line bridge circuit 121 has a bow-shaped structure.

[0046] Adopting a bow-shaped structure can better improve the parameter performance of the polarization coupler.

[0047] In some embodiments, the dielectric constant of the power splitter plate 140 is 2 to 6, and the thickness is 0.5 to 1.5 mm; the dielectric constant of the coupling plate 130 is 2 to 4, and the thickness is 1.0 to 2 mm; the dielectric constant of the bridge plate 120 is 2 to 4, and the thickness is 0.2 to 0.5 mm; the dielectric constant of the dielectric substrate 110 is 2 to 4, and the thickness is 1.0 to 2 mm.

[0048] It should be noted that the multi-channel polarization coupler described in the present application can operate in the L band and is a component capable of multi-channel monitoring simultaneously. By setting reasonable parameters for the power splitter plate 140, the coupling plate 130, the bridge plate 120, and the dielectric substrate 110, the parameter performance of the polarization coupler can be better achieved within the limited cavity 10 space.

[0049] Although the description of the disclosure of the present application has been quite detailed and particularly describes several of the described embodiments, it is not intended to be limited to any of these details or embodiments or any particular embodiment, but rather should be regarded as providing a broad possible interpretation of these claims in light of the prior art, thereby effectively covering the intended scope of the disclosure of the present application. In addition, the present application has been described above with embodiments foreseeable by the inventor for the purpose of providing a useful description, and those non-substantive modifications to the present application that are not currently foreseeable may still represent equivalent modifications of the present disclosure.

Claims

1. A multi-channel polarization coupler, characterized in that, Comprising: A cavity, inside which a plurality of parallel arranged mounting grooves are formed. Inside the mounting groove, a dielectric substrate, a bridge board, and a coupling board are stacked in sequence from top to bottom. The coupling board is disposed at the top of the bottom of the mounting groove, and a power divider board is further disposed at the bottom of the bottom of the mounting groove. The bridge board is provided with a stripline bridge circuit, the coupling board is provided with a stripline coupling circuit and a stripline through circuit, and the power divider board is provided with a microstrip line power divider circuit. The stripline bridge circuit is respectively connected to the stripline coupling circuit and the stripline through circuit, and the stripline coupling circuit is connected to the microstrip line power divider circuit.

2. The multi-path polarization coupler according to claim 1, wherein The multi-path polarization coupler further includes an upper cover plate and a lower cover plate. The upper cover plate is connected to the top end of the cavity, and the lower cover plate is connected to the bottom end of the cavity. The upper cover plate and the lower cover plate seal the plurality of mounting grooves, and the power divider board is disposed in the space formed by the lower cover plate and the bottom of the mounting groove.

3. The multi-channel polarization coupler according to claim 1, characterized in that A pair of input feed connectors are provided on the front groove plate of the mounting groove, and a pair of output feed connectors are provided on the rear groove plate; a main path feed connector is provided on one side of the cavity. The input end of the power divider circuit is connected to the main path feed connector, and the output ends of the power divider circuit are respectively connected to the coupling ends of each coupling circuit in one-to-one correspondence; the two input ends of the bridge circuit are respectively connected to a pair of input feed connectors in one-to-one correspondence, and the two output ends of the bridge circuit are respectively connected to the input end of the coupling circuit and the input end of the through circuit in one-to-one correspondence; the output ends of the coupling circuit and the through circuit are respectively connected to a pair of output feed connectors in one-to-one correspondence.

4. The multi-path polarization coupler according to claim 1, characterized in that A pressing block is further provided at the top end of the dielectric substrate. The coupling board, the bridge board, the dielectric substrate, the power divider board, and the pressing block are all provided with screw holes, and the coupling board, the bridge board, the dielectric substrate, the power divider board, and the pressing block are fixedly connected to the bottom of the groove through the screw holes.

5. The multi-channel polarization coupler according to claim 4, characterized in that, Both the cavity and the pressing block are made of metal conductor materials.

6. The multi-path polarization coupler according to claim 1, characterized in that A through hole is provided between the coupling board and the power divider board, and a ball plunger is disposed in the through hole. The output end of the power divider circuit is connected to the coupling end of the coupling circuit through the ball plunger.

7. The multi-channel polarization coupler according to claim 1, characterized in that The stripline bridge circuit is in a bow-shaped structure.

8. The multi-path polarization coupler according to claim 1, characterized in that, The power divider board has a dielectric constant of 2 to 6 and a thickness of 0.5 to 1.5 mm; the coupling board has a dielectric constant of 2 to 4 and a thickness of 1.0 to 2 mm; the bridge board has a dielectric constant of 2 to 4 and a thickness of 0.2 to 0.5 mm; the dielectric substrate has a dielectric constant of 2 to 4 and a thickness of 1.0 to 2 mm.

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