Integrated microwave transmission system

Abstract

The invention discloses an integrated microwave transmission system, and belongs to the technical field of microwaves. According to the design of the integrated microwave transmission system, the microwave transmission channel is directly integrated on the cover plate, so that the relative position of the transmission reed in the transmission channel can be effectively ensured, a high-order mode is prevented from entering a working frequency band, and the transmission frequency of the single-pole double-throw coaxial switch is greatly improved; the positioning pin is directly integrated on the cavity to form the positioning column, so that the positioning precision can be improved, and the electrical performance index of the switch is improved; according to the invention, by adopting the external limiting design, the generation of friction redundancy is transferred from the inside of the microwave transmission channel to the outside of the channel, so that the risk of poor contact can be effectively reduced, and the repeatability of the switch is improved.

Description

Technical Field

[0001] The invention belongs to the field of microwave technology, and in particular relates to an integrated microwave transmission system. Background Art

[0002] As a microwave passive device, RF coaxial switch mainly realizes the transmission and switching of microwave signals and is widely used in automatic test systems, radar and communication fields. Among the existing RF coaxial switches, there is a single-pole double-throw coaxial switch, which consists of a circuit control system, an electromagnetic drive system and a microwave transmission system. Its microwave transmission system is usually split, such as Figure 1 As shown, the microwave transmission channel is processed on the cavity, and the transmission reed is assembled on the cover plate. This means that the position of the transmission reed in the microwave channel is largely determined by the assembly accuracy of the cover plate and the cavity assembly, and the relative position of the transmission reed in the channel directly affects the working bandwidth of the switch.

[0003] like Figure 2 As shown, the existing single-pole double-throw switch structure usually limits the movement of the reed assembly through a cover hole or a limit hole in the cavity, and its limit position is within the microwave transmission channel. During the switch switching process, excess friction enters the cavity and accumulates on the contact surface, resulting in poor contact.

[0004] Disadvantages of existing technology:

[0005] 1. The existing microwave transmission system of the single-pole double-throw switch usually adopts a split type. The microwave transmission channel is processed on the cavity, and the transmission reed is assembled on the cover plate. This results in the position of the transmission reed in the microwave channel being largely determined by the assembly accuracy of the cover plate and the cavity assembly, making it difficult to achieve ultra-wideband signal transmission;

[0006] 2. The existing single-pole double-throw switch structure usually limits the movement of the reed assembly through the cover hole or the limit hole in the cavity. During the switch switching process, excess friction enters the cavity and accumulates on the contact surface, resulting in poor contact. Summary of the invention

[0007] In view of the above technical problems existing in the prior art, the present invention proposes an integrated microwave transmission system, which has a reasonable design, overcomes the shortcomings of the prior art and has good effects.

[0008] In order to achieve the above object, the present invention adopts the following technical solution:

[0009] An integrated microwave transmission system includes a cover assembly and a cavity assembly;

[0010] The cover plate assembly includes a first medium support, a transmission reed, a medium support, a medium seat, a reset reed and a cover plate; the first medium support, the transmission reed and the medium support are fixed by adhesive bonding to form a reed assembly, which is installed on the inner side of the cover plate; the reed assembly and the medium seat are fixed by adhesive bonding, and the reset reed is located below the medium seat and outside the cover plate; the first medium support, the transmission reed, the medium support, the medium seat and the reset reed are all installed on the narrow side center line of the cover plate;

[0011] The cover plate is integrated with a microwave transmission channel to ensure the relative position of the transmission reed in the transmission channel;

[0012] The cavity assembly includes a cavity, a connector and a load; the connector and the load are installed through threaded holes on the cavity, wherein the connector is installed at the middle threaded hole position and the adjacent threaded hole position of the cavity, and the load is installed at the threaded holes at both ends of the cavity;

[0013] A positioning pin is integrated on the cavity, and the positioning pin serves as a positioning column to improve the positioning accuracy.

[0014] Preferably, the connector includes an inner conductor of the joint, a second dielectric support, a third dielectric support and an outer conductor of the connector; the second dielectric support and the third dielectric support are divided into two halves, the second dielectric support is installed in a closed position near the end face of the inner conductor of the joint, and the third dielectric support is installed in a closed position near the opposite socket of the inner conductor of the joint, and the second dielectric support, the third dielectric support and the inner conductor of the joint are installed at the inner hole of the outer conductor of the connector.

[0015] Preferably, the load includes a load inner conductor, a fourth dielectric support, a first outer conductor, a substrate cavity, a load sheet and a second outer conductor; the load sheet is welded inside the substrate cavity to form a substrate cavity assembly, the substrate cavity assembly is installed at the bottom of the hole of the second outer conductor, the fourth dielectric support is divided into two halves, the fourth dielectric support is closed and installed at a position close to the end face of the load inner conductor, the fourth dielectric support and the load inner conductor are installed at the inner hole of the first outer conductor, and the fourth dielectric support, the load inner conductor and the first outer conductor are installed at the inner hole of the second outer conductor.

[0016] Preferably, the microwave transmission system adopts an external limit design structure, and the limit position of the external limit design structure is located outside the microwave transmission channel.

[0017] Beneficial technical effects brought by the present invention:

[0018] 1. The design of the integrated microwave transmission system adopted by the present invention can effectively ensure the relative position of the transmission reed in the transmission channel by directly integrating the microwave transmission channel into the cover plate, prevent high-order modes from entering the working frequency band, and greatly improve the transmission frequency of the single-pole double-throw coaxial switch;

[0019] 2. The present invention integrates the positioning pin directly into the cavity to form a positioning column, which can improve the positioning accuracy and thus improve the electrical performance index of the switch;

[0020] 3. The present invention adopts an external limit design to transfer the generation of friction waste from the inside of the microwave transmission channel to the outside of the channel, which can effectively reduce the risk of poor contact and improve the switch repeatability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a split type microwave transmission system;

[0022] Figure 2 This is a traditional limit structure diagram;

[0023] Figure 3 It is the structure diagram of single-pole double-throw switch;

[0024] Figure 4 This is the overall structure diagram of the microwave transmission system;

[0025] Figure 5 It is the overall cross-sectional view of the microwave transmission system;

[0026] Among them, 1-first dielectric support; 2-transmission reed; 3-dielectric support; 4-dielectric seat; 5-reset reed; 6-cover plate; 7-connector; 8-load; 9-cavity;

[0027] Figure 6 This is the connector structure diagram;

[0028] Among them, 10-connector inner conductor; 11-second dielectric support; 12-connector outer conductor; 13-third dielectric support;

[0029] Figure 7 is the load structure diagram;

[0030] Among them, 14-load inner conductor; 15-fourth dielectric support; 16-first outer conductor; 17-substrate cavity; 18-load sheet; 19-second outer conductor;

[0031] Figure 8 This is the structural diagram of the integrated microwave transmission system;

[0032] Fig. 9 This is the external limit structure diagram. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0034] The structure of the single-pole double-throw coaxial switch of the present invention is as follows: Figure 3 shown.

[0035] The single-pole double-throw coaxial switch is divided into three parts, namely, a circuit control system, an electromagnetic drive system and a microwave transmission system. The present invention mainly introduces a design method of an integrated microwave transmission system and a single-pole double-throw coaxial switch design.

[0036] like Figure 4-5 As shown, the microwave transmission system of the present invention is composed of a cover assembly and a cavity assembly. The cover assembly includes a reset spring, a transmission spring, a dielectric support, a dielectric seat and a cover; the cavity assembly includes a cavity, a connector and a load.

[0037] like Figure 6 As shown, the connector inner conductor 10, the second dielectric support 11, the third dielectric support 13 and the connector outer conductor 12 together form a connector. The installation process is as follows: the second dielectric support 11 and the third dielectric support 13 are divided into two halves, the second dielectric support 111 is installed at the position of the connector inner conductor 10 close to the end surface, and the third dielectric support 13 is installed at the position of the connector inner conductor 10 close to the plug hole, and finally the second dielectric support 11, the third dielectric support 13 and the connector inner conductor 10 are installed to the inner hole of the connector outer conductor.

[0038] like Figure 7 As shown, the load inner conductor 14, the fourth dielectric support 15, the first outer conductor 16, the substrate cavity 17, the load sheet 18 and the second outer conductor 19 together form a load. The installation process is as follows: the load sheet 18 is welded in the substrate cavity 17 to form a substrate cavity assembly, the substrate cavity assembly is installed at the bottom of the hole in the second outer conductor 19, the fourth dielectric support 15 is divided into two halves, and the fourth dielectric support 15 is closed and installed at a position close to the end face of the load inner conductor 14, then the fourth dielectric support 15 and the load inner conductor 14 are installed at the inner hole of the first outer conductor 16, and finally installed at the inner hole of the second outer conductor 19.

[0039] Description of the relationship between each part:

[0040] The first dielectric support 1, the transmission reed 2 and the dielectric support 3 are fixed by adhesive bonding to form a reed assembly; the reed assembly and the dielectric seat 4 are fixed by adhesive bonding; the microwave cavity on the cover plate 6 is a path for signal transmission;

[0041] The principle and action relationship of the transmission mechanism:

[0042] When a control signal is applied to the switch, the electromagnetic drive system is activated, and the dielectric seat 4 is pressed down, the dielectric seat 4 moves downward and presses down the reset spring 2, driving the spring assembly to move downward until the two ends of the transmission spring 2 in the spring assembly overlap with the conductor inside the connector or the conductor inside the load, thereby realizing the connection of the microwave transmission path or the conduction of the load; when the dielectric seat 4 is not pressed down, the dielectric seat 4 is subjected to the reset force given by the reset spring 2, driving the spring assembly to move upward until the two ends of the transmission spring 2 in the spring assembly are disconnected from the conductor inside the connector or the conductor inside the load, thereby realizing the disconnection of the microwave transmission path or the disconnection of the load.

[0043] like Figure 8 As shown, by directly integrating the microwave transmission channel into the cover plate, the relative position of the transmission reed in the transmission channel can be effectively guaranteed, preventing high-order modes from entering the working frequency band, and greatly improving the transmission frequency of the single-pole double-throw coaxial switch. The cover plate assembly and the cavity assembly of the traditional solution are positioned by positioning pins during assembly, and the positioning pins and the positioning holes on the cavity have a certain tolerance. The present invention integrates the positioning pins directly into the cavity to form positioning columns, which can further improve the positioning accuracy.

[0044] like Fig. 9 As shown, the present invention adopts an external limit design to transfer the generation of friction waste from the inside of the microwave transmission channel to the outside of the channel, which can effectively reduce the risk of poor contact and improve the switch repeatability.

[0045] The key points of the present invention are:

[0046] 1. By integrating the microwave transmission channel directly into the cover plate, the relative position of the transmission reed in the transmission channel can be effectively guaranteed, preventing high-order modes from entering the working frequency band, and greatly improving the transmission frequency of the single-pole double-throw coaxial switch;

[0047] 2. The present invention integrates the positioning pin directly into the cavity to form a positioning column, which can further improve the positioning accuracy;

[0048] 3. External limit design of microwave transmission system;

[0049] Protection points of the present invention:

[0050] 1. Design of integrated microwave transmission system;

[0051] 2. External limit design of microwave transmission system;

[0052] 3. The structural design of the positioning pin integrated into the cavity.

[0053] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. An integrated microwave transmission system, characterized in that: It includes a cover plate assembly and a cavity assembly; The cover plate assembly includes a first medium support, a transmission reed, a medium support, a medium seat, a reset reed and a cover plate; the first medium support, the transmission reed and the medium support are fixed by adhesive bonding to form a reed assembly, which is installed on the inner side of the cover plate; the reed assembly and the medium seat are fixed by adhesive bonding, and the reset reed is located below the medium seat and outside the cover plate; the first medium support, the transmission reed, the medium support, the medium seat and the reset reed are all installed on the narrow side center line of the cover plate; The cover plate is integrated with a microwave transmission channel to ensure the relative position of the transmission reed in the transmission channel; The cavity assembly includes a cavity, a connector and a load; the connector and the load are installed through threaded holes on the cavity, wherein the connector is installed at the middle threaded hole position and the adjacent threaded hole position of the cavity, and the load is installed at the threaded holes at both ends of the cavity; A positioning pin is integrated on the cavity, and the positioning pin serves as a positioning column to improve the positioning accuracy.

2. The integrated microwave transmission system according to claim 1, characterized in that: The connector includes an inner conductor of the joint, a second dielectric support, a third dielectric support and an outer conductor of the connector; the second dielectric support and the third dielectric support are divided into two halves, the second dielectric support is installed in a position where the inner conductor of the joint is close to the end face, and the third dielectric support is installed in a position where the inner conductor of the joint is close to the plug hole, and the second dielectric support, the third dielectric support and the inner conductor of the joint are installed at the inner hole of the outer conductor of the connector.

3. The integrated microwave transmission system according to claim 1, characterized in that: The load comprises a load inner conductor, a fourth dielectric support, a first outer conductor, a substrate cavity, a load sheet and a second outer conductor; The load sheet is welded inside the substrate cavity to form a substrate cavity assembly, the substrate cavity assembly is installed at the bottom of the hole of the second outer conductor, the fourth dielectric support is divided into two halves, the fourth dielectric support is installed at a position close to the end surface of the load inner conductor, the fourth dielectric support and the load inner conductor are installed at the inner hole of the first outer conductor, and the fourth dielectric support, the load inner conductor, and the first outer conductor are installed at the inner hole of the second outer conductor.

4. The integrated microwave transmission system according to claim 1, characterized in that: The microwave transmission system adopts an external limit design structure, and the limit position of the external limit design structure is located outside the microwave transmission channel.

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