Microwave transmission system

Abstract

The invention discloses a microwave transmission system, and belongs to the technical field of microwaves. The microwave transmission system comprises a cover plate assembly and a cavity assembly, and the cover plate assembly comprises a transmission reed, a first medium support, a second medium support, a connecting strip and a cover plate; the connecting strip is bonded with the transmission reed, the first medium support and the second medium support through double-tube glue to jointly form a reed assembly; the cover plate is in buckled connection with the connecting strip; the cavity assembly comprises a cavity; and a connector is arranged in the cavity. The microwave transmission system is applied to the double-pole double-throw coaxial switch, the transmission frequency of the microwave transmission system can be up to 67 GHz, the transmission frequency of an existing double-pole double-throw coaxial switch is greatly improved to 67 GHz from 50 GHz at most, and the requirement for high-frequency signal transmission is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of microwave, and particularly relates to a microwave transmission system. Background Art

[0002] As a microwave passive device, a radio frequency coaxial switch mainly realizes the transmission and switching of microwave signals, and is widely used in automatic test systems, radars, and communication fields. Among existing radio frequency coaxial switches, there is a double-pole double-throw coaxial switch, which consists of a relay system and a microwave transmission system. Since the shape of the transmission reed structure in its microwave transmission system cannot well match the transmission line impedance, for the existing double-pole double-throw coaxial switch, the highest microwave transmission frequency can reach 50 GHz, and it is impossible to achieve the transmission of higher-frequency microwave signals, thus unable to meet the development needs of test and measurement instruments in higher frequency bands.

[0003] Disadvantages of the prior art:

[0004] For the existing double-pole double-throw coaxial switch, it is difficult to achieve the transmission of DC~67 GHz broadband signals;

[0005] The structure of the existing double-pole double-throw switch usually restricts the movement of the reed assembly through the cover plate holes. During the switch switching process, friction debris 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 microwave transmission system, which is reasonably designed, overcomes the deficiencies of the prior art, and has good effects.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A microwave transmission system includes a cover plate assembly and a cavity assembly. The cover plate assembly includes a transmission reed, a first dielectric support, a second dielectric support, a connecting strip, and a cover plate; the connecting strip is adhesively bonded to the transmission reed, the first dielectric support, and the second dielectric support by double-tube glue to jointly form a reed assembly; the cover plate is snap-connected to the connecting strip; the cavity assembly includes a cavity; a connector is arranged in the cavity.

[0009] Preferably, four transmission reeds are provided, and each transmission reed is provided with three circular parts. The circular parts on both sides are used to cooperate with the first dielectric support, and a hole for fixing the second dielectric support is provided in the middle circular part.

[0010] Preferably, the two end faces of the transmission reed adopt a deformation design structure to match the transmission line impedance, ensure that the transmission frequency of the microwave transmission system can reach 67 GHz, and its deformed end face is a moving contact that contacts the inner conductor of the connector.

[0011] Preferably, the connector includes an outer conductor, an inner conductor, a third dielectric support, and an outer sleeve ring. The upper surface of the inner conductor is a static contact that contacts the transmission reed.

[0012] Preferably, eight limit posts are provided on the cover plate. The limit posts cooperate with the limit holes on the four connecting bars to ensure that the transmission reed does not rotate during movement.

[0013] Preferably, a 1.85 mm connector is used for the connector.

[0014] Preferably, the reed assembly is a moving part of a double - pole double - throw coaxial switch and moves with the electromagnetic drive system of the double - pole double - throw coaxial switch.

[0015] The beneficial technical effects brought by the present invention:

[0016] The present invention discloses a DC - 67 GHz broadband microwave transmission system and a double - pole double - throw coaxial switch, which improves the operating frequency of the double - pole double - throw switch. By changing the structural dimensions of the transmission reed in the double - pole double - throw coaxial switch and the dimensional structure of the microwave transmission channel, the transmission frequency of the double - pole double - throw coaxial switch reaches 67 GHz, greatly improving the transmission frequency of the double - pole double - throw coaxial switch and meeting the measurement requirements of test and measurement instruments in a higher frequency band; by adopting an external limit design for the transmission cavity, the reed assembly is positioned and friction - moved outside the transmission cavity, reducing the risk of redundant substances generated by friction entering the internal contacts and effectively improving repeatability.

[0017] The microwave transmission system of the present invention designs the structural dimensions at the lap joint between the transmission reed and the inner conductor of the intermediate RF connector, and uses the deformation design change method to match the transmission line impedance, enabling the transmission frequency of the microwave transmission system to be as high as 67 GHz.

[0018] The present invention ensures that the transmission reed does not rotate during movement through the dimensional cooperation between the limit posts on the cover plate and the limit holes on the connecting bars, and in this way, it can effectively reduce the entry of redundant friction substances into the microwave cavity and improve the repeatability of the switch.

[0019] The microwave transmission system of the present invention is applied to a double - pole double - throw coaxial switch, and its transmission frequency can reach up to 67 GHz, greatly increasing the transmission frequency of the existing single - pole double - throw coaxial switch from a maximum of 50 GHz to 67 GHz, meeting the demand for high - frequency signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural diagram of a double - pole double - throw coaxial electromechanical switch;

[0021] Figure 2 is an overall structural diagram of the microwave transmission system;

[0022] Figure 3 is a view of the cover plate;

[0023] Among them, 1 - cover plate; 2 - connecting strip; 3 - first dielectric support 3; 4 - second dielectric support; 5 - transmission reed

[0024] Figure 4 It is a view of the reed assembly;

[0025] Figure 5 It is a view of the transmission reed;

[0026] Figure 6 It is a view of the cavity assembly;

[0027] Among them, 6 - cavity; 7 - outer conductor; 8 - inner conductor; 9 - third dielectric support; 10 - outer sleeve ring;

[0028] Figure 7 It is a schematic diagram of a 1.85 mm connector. Specific implementation mode

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation modes:

[0030] As Figure 1 shown, the double - 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 67 GHz microwave transmission system and a double - pole double - throw coaxial switch.

[0031] Structural description and principle description of the microwave transmission system of the present invention:

[0032] As Figure 2 shown, a microwave transmission system includes a cover plate assembly and a cavity assembly.

[0033] As Figure 3 shown, the cover plate assembly includes a transmission reed 5, a first dielectric support 3, a second dielectric support 4, a connecting strip 2, and a cover plate 1.

[0034] As Figure 4 shown, the connecting strip 2 is adhesively bonded to the transmission reed 5, the first dielectric support 3, and the second dielectric support 4 with double - tube glue to jointly form a reed assembly; the cover plate 1 is snap - connected to the connecting strip 2.

[0035] As Figure 5 shown, there are four transmission reeds, and each transmission reed 5 is provided with three circular parts. The circular parts on both sides are used to cooperate with the first dielectric support 3, and the middle circular part is provided with a hole for fixing the second dielectric support 4.

[0036] Both end faces of the transmission reed 5 adopt a deformed design structure for matching the transmission line impedance to ensure that the transmission frequency of the microwave transmission system can reach 67 GHz. Its deformed end face is a moving contact that contacts the inner conductor of the connector.

[0037] As Figures 6-7 shown, the cavity component includes a cavity 6; a connector is arranged inside the cavity. The connector includes an outer conductor 7, an inner conductor 8, a third dielectric support 9, and an outer sleeve ring 10. The upper surface of the inner conductor 8 is a static contact that contacts the transmission reed 5.

[0038] Eight limit posts are arranged on the cover plate 1. The limit posts cooperate with the upper limit holes of the four connecting bars 2 to ensure that the transmission reed does not rotate during movement.

[0039] The connector adopts a 1.85 mm connector.

[0040] The reed assembly is the moving part of a double-pole double-throw coaxial switch and moves with the electromagnetic drive system of the double-pole double-throw coaxial switch.

[0041] Principle and action relationship description of the transmission mechanism:

[0042] When a control signal is applied to the switch, the electromagnetic drive system acts. When the connecting bar 2 is pressed down, the connecting bar 2 moves downward to drive the reed assembly to move downward until both ends of the transmission reed 5 in the reed assembly are lapped with the inner conductor 8 of the joint, realizing the connection of the microwave transmission path.

[0043] In the present invention, the dimensional cooperation between the limit posts on the cover plate 1 and the upper limit holes on the connecting bar 2 is used to ensure that the transmission reed 5 does not rotate during movement, and in this way, it can effectively reduce the entry of friction debris into the microwave cavity and improve the repeatability of the switch.

[0044] Key points of the present invention:

[0045] 1. Outer limit structure design on the cover plate assembly; the dimensional cooperation between the limit posts on the cover plate and the upper limit holes on the connecting bar is used to ensure that the transmission reed does not rotate during movement, and in this way, it can effectively reduce the entry of friction debris into the microwave cavity and improve the repeatability of the switch.

[0046] 2. Deformed design on the transmission reed.

[0047] Protected points of the present invention:

[0048] 1. Outer limit structure design on the cover plate assembly; 2. Deformed design on the transmission reed.

[0049] Certainly, 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 those skilled in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A microwave transmission system, characterized in that: It includes a cover plate assembly and a cavity assembly, wherein the cover plate assembly includes a transmission reed, a first medium support, a second medium support, a connecting strip and a cover plate; the connecting strip, the transmission reed, the first medium support and the second medium support are bonded by double-tube glue to form a reed assembly; The cover plate is snap-connected to the connecting strip; the cavity assembly includes a cavity; and a connector is arranged in the cavity.

2. The microwave transmission system according to claim 1, characterized in that: Four transmission reeds are provided, and each transmission reed is provided with three circular parts. The circular parts on both sides are used to cooperate with the first medium support, and the middle circular part is provided with a hole for fixing the second medium support.

3. The microwave transmission system according to claim 1, characterized in that: The two end faces of the transmission reed adopt a deformation design structure to match the transmission line impedance and ensure that the transmission frequency of the microwave transmission system can reach 67GHz. The deformed end faces are the moving contacts that contact the inner conductor of the connector.

4. The microwave transmission system according to claim 1, characterized in that: The connector comprises an outer conductor, an inner conductor, a third dielectric support and an outer sleeve ring, and the upper surface of the inner conductor is a static contact point in contact with the transmission reed.

5. The microwave transmission system according to claim 1, characterized in that: The cover plate is provided with eight limiting posts, which cooperate with the limiting holes on the four connecting strips to ensure that the transmission reed does not rotate during movement.

6. The microwave transmission system according to claim 1, characterized in that: The connector uses a 1.85mm connector.

7. The microwave transmission system according to claim 1, characterized in that: The reed assembly is the actuating component of the double-pole double-throw coaxial switch, and it moves along with the electromagnetic drive system of the double-pole double-throw coaxial switch.

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