DC-110 GHz broadband microwave transmission system

Abstract

The invention discloses a DC-110 GHz broadband microwave transmission system, and belongs to the technical field of microwaves. According to the microwave transmission system disclosed by the invention, the structure size design is carried out on the lap joint of the transmission reed and the conductor in the middle radio frequency connector, and a width-narrowing step change mode is used, so that the impedance of the transmission line is matched, and the transmission frequency of the microwave transmission system can reach up to 110GHz; according to the invention, the size of the limiting column on the cover plate is matched with the size of the limiting hole in the medium seat, so that the transmission reed does not rotate in the movement process, friction redundant materials can be effectively prevented from entering the microwave cavity through the mode, and the repeatability of the switch is improved; the microwave transmission system is applied to the single-pole double-throw coaxial switch, the transmission frequency of the microwave transmission system can reach 110 GHz, the transmission frequency of an existing single-pole double-throw coaxial switch is greatly improved to 110 GHz from 67 GHz, and the requirement for high-frequency signal transmission is met.

Description

Technical Field

[0001] The invention belongs to the field of microwave technology, and in particular relates to a DC-110GHz broadband 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 relay system and a microwave transmission system. Since the transmission reed structure shape of its microwave transmission system cannot match the transmission line impedance well, the microwave transmission frequency of the existing single-pole double-throw coaxial switch can reach up to 67GHz, which cannot realize higher frequency microwave signal transmission and cannot meet the development needs of test and measurement instruments in higher frequency bands.

[0003] Disadvantages of existing technology:

[0004] 1. It is difficult to achieve DC to 110GHz wideband signal transmission with the existing single-pole double-throw switch;

[0005] 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

[0006] In view of the above technical problems existing in the prior art, the present invention proposes a DC-110GHz broadband microwave transmission system, which has a reasonable design, overcomes the shortcomings of the prior art and has good effects.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A DC-110GHz broadband microwave transmission system, comprising a cover plate assembly and a cavity assembly;

[0009] 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;

[0010] 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 adjacent threaded hole positions of the cavity, and the load is installed at the threaded holes at both ends of the cavity.

[0011] Preferably, the connector includes an inner conductor of the connector, 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 connector, and the third dielectric support is installed in a closed position near the socket of the inner conductor of the connector, and the second dielectric support, the third dielectric support and the inner conductor of the connector are installed at the inner hole of the outer conductor of the connector.

[0012] 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.

[0013] Preferably, circular holes glued to the dielectric support are provided on both sides of the middle of the transmission reed; the two end surfaces of the transmission reed are designed with narrowed width to match the transmission line impedance and ensure that the transmission frequency of the microwave transmission system can reach 110 GHz.

[0014] Preferably, the microwave channel on the cover plate adopts a gradual structure design with narrowing width at the overlap between the transmission reed and the inner conductor of the joint or the inner conductor of the load, and the size of this gradual structure matches the structural size of the transmission reed; the position where the dielectric support is located adopts an impedance matching compensation design to ensure that the transmission frequency of the microwave transmission system can reach 110GHz.

[0015] Preferably, the sizes of the limit post on the cover plate and the upper limit hole of the medium seat match each other to ensure that the transmission reed does not rotate during movement.

[0016] Preferably, the connector is a 1mm connector; the load is a 1mm load; and the load sheet is a 1mm load sheet.

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

[0018] 1. The microwave transmission system of the present invention designs the structural dimensions of the joint between the transmission spring and the inner conductor of the intermediate RF connector, and uses a step-wise change method with narrowing width to match the transmission line impedance, thereby ensuring that the transmission frequency of the microwave transmission system can reach up to 110 GHz.

[0019] 2. The microwave channel of the present invention is gradually narrowed in width at the overlap between the transmission reed and the inner conductor of the joint or the inner conductor of the load, so that it matches the structural size of the transmission reed, and impedance matching compensation is performed at the location of the dielectric support, thereby ensuring that the transmission frequency of the microwave transmission system can reach 110 GHz.

[0020] 3. The present invention ensures that the transmission reed does not rotate during movement by matching the size of the limit column on the cover plate with the upper limit hole on the medium seat. This method can effectively reduce the friction excess from entering the microwave cavity and improve the repeatability of the switch.

[0021] 4. The microwave transmission system of the present invention is applied to a single-pole double-throw coaxial switch, and its transmission frequency is up to 110 GHz, which greatly increases the maximum transmission frequency of the existing single-pole double-throw coaxial switch from 67 GHz to 110 GHz, meeting the demand for high-frequency signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the structure diagram of single-pole double-throw switch;

[0023] Figure 2 This is the overall structure diagram of the microwave transmission system;

[0024] Figure 3 3D view of the cover assembly;

[0025] Figure 4 This is a 3D view of the cavity component;

[0026] Figure 5 It is the overall cross-sectional view of the microwave transmission system;

[0027] Among them, 1-first dielectric support; 2-transmission reed; 3-dielectric support; 4-dielectric seat; 5-reset reed; 6-cover plate; 7-1mm connector; 8-1mm load; 9-cavity;

[0028] Figure 6 This is the structural diagram of the 1mm connector;

[0029] Among them, 10-connector inner conductor; 11-second dielectric support; 12-connector outer conductor; 13-third dielectric support;

[0030] Figure 7 This is the 1mm load structure diagram;

[0031] Among them, 14-load inner conductor; 15-fourth dielectric support; 16-first outer conductor; 17-substrate cavity; 18-1mm load sheet; 19-second outer conductor;

[0032] Figure 8 It is the structure diagram of the transmission reed;

[0033] Fig. 9 This is the microwave channel structure diagram;

[0034] Fig.10 A cross-sectional view of the cover assembly. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0036] The structure of the single-pole double-throw coaxial switch of the present invention is as follows:

[0037] like Figure 1 As shown, 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 DC-110GHz broadband microwave transmission system and a single-pole double-throw coaxial switch.

[0038] like Figure 2 and Figure 5 As shown, the microwave transmission system of the present invention is composed of a cover plate assembly and a cavity assembly.

[0039] like Figure 3 As shown, the cover plate assembly includes a first dielectric support 1, a transmission spring 2, a dielectric support 3, a dielectric seat 4, a reset spring 5 and a cover plate 6. The first dielectric support 1, the transmission spring 2 and the dielectric support 3 are fixed by adhesive bonding to form a spring assembly, which is installed on the inner side of the cover plate 6; the spring assembly and the dielectric seat 4 are fixed by adhesive bonding, and the reset spring 5 is located below the dielectric seat 4 and outside the cover plate 6; the first dielectric support 1, the transmission spring 2, the dielectric support 3, the dielectric seat 4 and the reset spring 5 are all installed on the narrow side center line of the cover plate 6.

[0040] like Figure 4 As shown, the cavity assembly includes a cavity 9, a 1mm connector 7 and a 1mm load 8. The 1mm connector 7 and the 1mm load 8 are installed through the threaded holes on the cavity, wherein the 1mm connector 7 is installed in the middle threaded hole position and the adjacent threaded hole position of the cavity 9, and the 1mm load 8 is installed in the threaded holes at both ends of the cavity 9.

[0041] 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 1mm 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 11 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 12.

[0042] 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 1mm load sheet 18 and the second outer conductor 19 together form a 1mm load. The installation process is as follows: the 1mm load sheet 18 is welded in the substrate cavity 17 to form a substrate cavity assembly, and 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 installed at a position close to the end face of the load inner conductor 14, and 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.

[0043] Description of the relationship between each part:

[0044] The microwave cavity on the cover plate 6 is a pathway for signal transmission;

[0045] The principle and action relationship of the transmission mechanism:

[0046] 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 5, 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 5, 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.

[0047] like Figure 8 As shown, circular holes glued to the dielectric support 3 are provided on both sides of the middle of the transmission reed 2; the width of the two ends of the transmission reed 2 is narrowed to match the transmission line impedance and ensure that the transmission frequency of the microwave transmission system can reach 110 GHz.

[0048] like Fig. 9 As shown, the microwave channel on the cover plate 6 is gradually narrowed in width at the overlap between the transmission reed 2 and the inner conductor of the joint or the inner conductor of the load, so that it matches the structural size of the transmission reed 2, and impedance matching compensation is performed at the position of the dielectric support 3, thereby ensuring that the transmission frequency of the microwave transmission system can reach 110 GHz.

[0049] like Fig.10 As shown, the present invention ensures that the transmission reed 2 does not rotate during movement by matching the size of the limit column on the cover plate 6 with the limit hole on the medium seat 4, and in this way, it can effectively reduce the friction excess from entering the microwave cavity and improve the repeatability of the switch.

[0050] 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. A DC to 110 GHz broadband 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 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 adjacent threaded hole positions of the cavity, and the load is installed at the threaded holes at both ends of the cavity.

2. The DC-110 GHz broadband microwave transmission system according to claim 1, characterized in that: The connector includes an inner conductor of the connector, 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 connector is close to the end face, and the third dielectric support is installed in a position where the inner conductor of the connector is close to the plug hole, and the second dielectric support, the third dielectric support and the inner conductor of the connector are installed at the inner hole of the outer conductor of the connector.

3. The DC-110 GHz broadband 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 together 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.

4. The DC-110 GHz broadband microwave transmission system according to claim 1, characterized in that: Circular holes glued to the dielectric support are provided on both sides of the middle of the transmission reed; the two end surfaces of the transmission reed are designed with narrowed width to match the transmission line impedance and ensure that the transmission frequency of the microwave transmission system can reach 110GHz.

5. The DC-110 GHz broadband microwave transmission system according to claim 1, characterized in that: The microwave channel on the cover plate adopts a gradual structure design with a narrower width at the overlap between the transmission reed and the inner conductor of the joint or the inner conductor of the load, and the size of this gradual structure matches the structural size of the transmission reed; Impedance matching compensation design is adopted at the location of the dielectric support to ensure that the transmission frequency of the microwave transmission system can reach 110 GHz.

6. The DC-110 GHz broadband microwave transmission system according to claim 1, characterized in that: The sizes of the limit post on the cover plate and the upper limit hole of the medium seat are matched to ensure that the transmission reed does not rotate during movement.

7. The DC-110 GHz broadband microwave transmission system according to claim 3, characterized in that: The connector uses a 1mm connector; the load uses a 1mm load; and the load sheet uses a 1mm load sheet.

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