A 67GHz microwave transmission system

Abstract

The invention discloses a 67GHz microwave transmission system, belonging to the field of microwave technology. The microwave transmission system of the invention designs the structural dimensions of the overlap between a transmission reed and an inner conductor of an intermediate radio frequency connector, and uses a step-wise change method of narrowing the width, thereby matching the impedance of a transmission line, and ensuring that the transmission frequency of the microwave transmission system can reach up to 67GHz; the microwave channel of the invention performs a gradual process of narrowing the width at the overlap between the transmission reed and an inner conductor of a connector or an inner conductor of a load, so as to match the structural dimensions of the transmission reed, and performs impedance matching compensation at the position where a dielectric support is located, thereby ensuring that the transmission frequency of the microwave transmission system can reach 67GHz; the invention ensures that the transmission reed does not rotate during movement by matching the dimensions of a limit column on a cover plate and an upper limit hole of a dielectric seat, and in this way, frictional excess can be effectively reduced from entering the interior of a microwave cavity, thereby improving the repeatability of the switch.

Description

Technical Field

[0001] The invention belongs to the field of microwave technology, and in particular relates to a 67 GHz 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 six-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 six-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 67GHz wideband signal transmission with the existing single-pole six-throw switch;

[0005] 2. The existing single-pole six-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 67 GHz 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 67 GHz microwave transmission system, comprising a cover assembly and a cavity assembly;

[0009] The cover plate assembly includes a first dielectric support, a transmission reed, a dielectric support, a dielectric seat, a reset reed and a cover plate; the first dielectric support, the transmission reed and the dielectric 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 dielectric seat are fixed by adhesive bonding, and the reset reed is located below the dielectric seat and outside the cover plate; the first dielectric support, the transmission reed, the dielectric support, the dielectric seat, the reset reed and the cover plate are spaced 60° apart;

[0010] The cavity assembly includes a cavity, a 1.85mm connector and a load; the 1.85 connector is installed through the threaded holes on the outside of the cavity, located at the middle hole on the outside of the cavity and the six holes extending outward; the load is located on the inside of the cavity, in a square step-shaped position near the edge.

[0011] Preferably, the 1.85mm connector includes an inner conductor of the connector, a second dielectric support, a third dielectric support and an outer conductor of the connector; each part of the cavity, the inner conductor of the connector, the second dielectric support, the third dielectric support and the outer conductor of the connector, and the load is spaced 60° apart and is divided into six parts on the cavity assembly.

[0012] Preferably, the two end surfaces of the transmission reed are designed with a narrowed width to match the impedance of the transmission line and ensure that the transmission frequency of the microwave transmission system can reach 67 GHz.

[0013] Preferably, the microwave channel on the cover plate adopts a gradual structural 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 structural design 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 67GHz.

[0014] 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.

[0015] Beneficial technical effects brought by the present invention:

[0016] 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 67 GHz.

[0017] 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 dimensions 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 67 GHz.

[0018] 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.

[0019] 4. The microwave transmission system of the present invention is applied to a single-pole six-throw coaxial switch, and its transmission frequency is up to 67 GHz, which greatly increases the transmission frequency of the existing single-pole six-throw coaxial switch to 67 GHz, meeting the demand for high-frequency signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the structure diagram of a single-pole six-throw switch;

[0021] Figure 2This is the overall structure diagram of the microwave transmission system;

[0022] Figure 3 3D view of the cover assembly;

[0023] Figure 4 This is a 3D view of the cavity component;

[0024] Figure 5 It is the overall cross-sectional view of the microwave transmission system;

[0025] Among them, 1-first dielectric support; 2-transmission reed; 3-dielectric support; 4-dielectric seat; 5-reset reed; 6-cover plate; 7-1.85mmmm connector; 8-load;

[0026] Figure 6 This is a schematic diagram of the 1.85mm connector structure;

[0027] Among them, 9 is the inner conductor of the connector; 10 is the second dielectric support; 11 is the outer conductor of the connector; 12 is the third dielectric support;

[0028] Figure 7 It is a schematic diagram of the structure of the reed assembly;

[0029] Figure 8 is a schematic diagram of the microwave channel structure;

[0030] Fig. 9 A cross-sectional view of the cover assembly. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0032] The structure of the single-pole six-throw coaxial switch of the present invention is as follows: Figure 1 shown.

[0033] The single-pole six-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 67GHz microwave transmission system and a single-pole six-throw coaxial switch.

[0034] 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.

[0035] like Figure 3As shown, the cover plate assembly includes a first dielectric support 1, a transmission reed 2, a dielectric support 3, a dielectric seat 4, a reset reed 5 and a cover plate 6; the first dielectric support 1, the transmission reed 2 and the dielectric support 3 are fixed by adhesive bonding to form a reed assembly, which is installed on the inner side of the cover plate 6; the reed assembly and the dielectric seat 4 are fixed by adhesive bonding, and the reset reed 5 is located below the dielectric seat 4 and outside the cover plate 6; the first dielectric support 1, the transmission reed 2, the dielectric support 3, the dielectric seat 4, the reset reed 5 and the cover plate 6 are spaced 60° apart.

[0036] like Figure 4 As shown, the cavity assembly includes a cavity, a 1.85mm connector, and a load.

[0037] The 1.85 connector is installed through the threaded holes on the outside of the cavity, located at the middle hole on the outside of the cavity and the six holes extending outward; the load is located on the inside of the cavity, in a square step-shaped position near the edge.

[0038] like Figure 6 As shown, the connector inner conductor 9, the second dielectric support 10, the third dielectric support 12 and the connector outer conductor 11 together form a 1.85 mm connector.

[0039] Each part of the cavity, the inner conductor 9 of the joint and the second dielectric support 10, the third dielectric support 12, the outer conductor 11 of the connector, and the load 8 is spaced 60 degrees apart, and is divided into six parts on the cavity assembly.

[0040] The microwave cavity on the cover plate 6 is a pathway 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 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 in the joint, thereby realizing the connection of the microwave transmission path; 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 in the joint, thereby realizing the disconnection of the microwave transmission path.

[0043] like Figure 7 As shown, the transmission reed 2 and the dielectric support 3 are glued to form a reed assembly; the width of the transmission reed 2 is narrowed at both ends to match the transmission line impedance and ensure that the transmission frequency of the microwave transmission system can reach 67 GHz.

[0044] like Figure 8As 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 67 GHz.

[0045] like Fig. 9 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.

[0046] 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 67 GHz microwave transmission system, characterized in that: It includes a cover plate assembly and a cavity assembly; The cover plate assembly includes a first dielectric support, a transmission reed, a dielectric support, a dielectric seat, a reset reed and a cover plate; the first dielectric support, the transmission reed and the dielectric 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 dielectric seat are fixed by adhesive bonding, and the reset reed is located below the dielectric seat and outside the cover plate; the first dielectric support, the transmission reed, the dielectric support, the dielectric seat, the reset reed and the cover plate are spaced 60° apart; The cavity assembly includes a cavity, a 1.85mm connector and a load; the 1.85 connector is installed through the threaded holes on the outside of the cavity, located at the middle hole on the outside of the cavity and the six holes extending outward; the load is located on the inside of the cavity, in a square step-shaped position near the edge.

2. The 67 GHz microwave transmission system according to claim 1, characterized in that: The 1.85mm connector includes an inner conductor of the connector, a second dielectric support, a third dielectric support and an outer conductor of the connector; each part of the cavity, the inner conductor of the connector, the second dielectric support, the third dielectric support and the outer conductor of the connector, and the load is spaced 60° apart and is divided into six parts on the cavity assembly.

3. The 67 GHz microwave transmission system according to claim 1, characterized in that: 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 67GHz.

4. The 67 GHz 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 67GHz.

5. The 67 GHz 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.

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