High-power microwave module through-wall sealing interconnection device

Abstract

The invention discloses a high-power microwave module through-wall sealing interconnection device, belongs to the technical field of microwaves, and solves the problems that high-power microwave modules are poor in standing wave performance after through-wall sealing interconnection and low in reliability under a high-power condition. The device comprises a power microwave module and a microwave connector, the power microwave module is provided with a through-wall structure, the power microwave module penetrates through the wall of a box body from the inside of the box body and then is fastened with the microwave connector through a screw to form a microwave module whole body, and finally the microwave module whole body is fastened on the wall and a bottom plate of the box body. According to the invention, the interconnection structure of the microwave module is simplified, the continuity of the reference ground of the microwave module is ensured, and the performance index and reliability of the microwave module after interconnection are improved.

Description

Technical Field

[0001] The invention belongs to the field of microwave technology. Background Art

[0002] In the microwave field, shielding boxes are generally used to shield microwave signals and protect internal microwave functional modules. However, shielding boxes will cause problems of wall-penetrating interconnection between microwave modules inside the box and microwave connectors outside the box.

[0003] Traditional technical solutions such as Figure 4 As shown, the microwave module inside the box is generally equipped with a microstrip line interface and installed close to the inner wall of the box body. The microwave connector outside the box body is installed on the side wall of the box body. After passing through the wall, the lower surface of the central conductor of the connector contacts the upper surface of the microstrip line of the microwave module, and then the two are interconnected by welding (or crimping).

[0004] However, the above solution has the following problems:

[0005] 1. Under high power conditions, the central conductor of the connector is thicker and the welding point is larger, resulting in impedance mismatch, causing the deterioration of microwave transmission performance, and the welding point has the risk of failure under long-term conditions.

[0006] 2. The microwaves of the microwave module inside the box cannot effectively contact the side walls of the box, resulting in indirect contact between the reference ground of the microwave module and the microwave reference ground of the microwave connector outside the box. The discontinuity of the reference ground affects the microwave transmission performance after interconnection under high power and high frequency conditions. In severe cases, local air breakdown and sparking failures may occur. Summary of the invention

[0007] The invention relates to a high-power microwave module through-wall sealed interconnection device, which can solve the problems of large voltage standing wave ratio, welding point failure, sparking failure, etc. in traditional technical solutions.

[0008] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0009] A high-power microwave module wall-penetrating sealed interconnection device comprises a high-power microwave module 1-1 and a microwave connector 1-2. The high-power microwave module 1-1 passes through a box body wall 2 from inside a box body and protrudes out of the box body wall 2. The microwave connector 1-2 is installed and fastened to the protruding high-power microwave module 1-1 by screws to form a microwave module as a whole 1. The microwave module as a whole 1 is first fastened to the box body wall 2 by screws, and then fastened to the box body bottom plate.

[0010] Preferably, the high-power microwave module 1-1 and the microwave connector 1-2 are connected in a microwave coaxial pinhole form, wherein the end of the high-power microwave module 1-1 is a needle and the microwave connector 1-2 is a hole, and the two are interconnected to form a standard coaxial line structure.

[0011] Preferably, the high-power microwave module 1-1 comprises two parts: a microwave module body 1-1-1 and a through-wall transition section 1-1-2. The microwave module body 1-1-1 and the through-wall transition section 1-1-2 are an integral structure and are integrally formed by mechanical processing.

[0012] Preferably, the through-wall transition section 1-1-2 is a microwave coaxial structure, including an outer conductor 1-1-21, an air medium 1-1-22, and a center conductor 1-1-23, and its characteristic impedance should be optimized to meet design requirements. The length of the through-wall transition section is 2 mm greater than the thickness of the box wall.

[0013] Preferably, the flange of the microwave connector 1-2 is designed with an inner circle screw hole 1-21, an outer circle screw hole 1-23 and a rubber sealing ring 1-22, the rubber sealing ring is located between the two groups of screw holes, the inner circle screw holes are fastened with screws and then coated with sealant, the through-wall length of the microwave connector 1-2 should be the same as the length of the through-wall transition section 1-1-2, the diameter of the dielectric layer should be the same as the air dielectric diameter of the through-wall transition section 1-1-2 and maintain a certain negative tolerance, the inner diameter of the inner conductor should be the same as the diameter of the central conductor of the through-wall transition section 1-1-2 and a reed structure should be adopted.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The connection form between the high-power microwave module and the microwave connector is a standard coaxial pinhole reed form, which improves the microwave transmission performance and transmission reliability compared with the traditional solder joint interconnection.

[0016] 2. The microwave connector uses screws to directly fasten the flange to the microwave module after passing through the wall to form a whole, which ensures the continuity of the microwave reference ground and the reliability of the device under high power conditions.

[0017] 3. The inner circle screws are coated with sealant, and a rubber sealing ring is designed between the two circles of screw holes to ensure the sealing of the shielding box.

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of an embodiment, wherein 1-1 is a high-power microwave module, 2 is a box wall, and 1-2 is a microwave connector.

[0020] Figure 2 It is a schematic diagram of the structure of the high-power microwave module 1-1 in the embodiment, wherein 1-1-1 is the microwave module body, 1-1-2 is the through-wall transition section, 1-1-21 is the outer conductor, 1-1-22 is the air medium, and 1-1-23 is the center conductor.

[0021] Figure 3 Schematic diagram of the structure of the microwave connector 1-2 in the embodiment, wherein 1-21 is an outer circle screw hole, 1-22 is a sealing ring, and 1-23 is an inner circle screw hole.

[0022] Figure 4 It is a structural diagram of a traditional solution, wherein 4-1 is a high-power microwave module, 4-2 is a microwave connector, and 4-3 is a box wall.

[0023] Figure 5 1 is a dimensional diagram of the high-power microwave module 1-1 of the embodiment.

[0024] Figure 6 1 is a dimensional diagram of the microwave connector 1-2 of the embodiment. DETAILED DESCRIPTION

[0025] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings.

[0026] A preferred embodiment of the present invention comprises a high-power microwave module 1-1 and a microwave connector 1-2. The high-power microwave module 1-1 is installed together with the microwave connector 1-2 after passing through the box body wall 2 from inside the box body. The thickness of the box body wall is 8mm, the length of the wall-penetrating portion of the high-power microwave module 1-1 is 10mm, and the distance of the high-power microwave module 1-1 protruding from the box body wall 2 through the box body wall 2 from the box body is 2mm. The microwave connector 1-2 is installed and fastened to the high-power microwave module 1-1 after passing through the box body wall 2 by screws to form a microwave module as a whole 1, and then the microwave module as a whole 1 is fastened to the box body wall 2 by screws, and then fastened to the box body bottom plate. The connection mode of the high-power microwave module 1-1 and the microwave connector 1-2 is a microwave coaxial pinhole form, wherein the end of the high-power microwave module 1-1 is a pin, and the microwave connector 1-2 is a hole, and the two are interconnected to form a standard coaxial line structure.

[0027] The high-power microwave module 1-1 includes two parts: a microwave module body 1-1-1 and a through-wall transition section 1-1-2. The microwave module body 1-1-1 and the through-wall transition section 1-1-2 are an integrated structure formed as a whole by mechanical processing. The through-wall transition section 1-1-2 is a microwave coaxial structure, including an outer conductor 1-1-21, an air medium 1-1-22, and a center conductor 1-1-23, and its characteristic impedance should be optimized to meet the design requirements. In this embodiment, the outer conductor 1-1-21 of the high-power microwave module is designed to be rectangular, with a length of 22mm and a height of 12mm. The air medium 1-1-22 is a cylindrical cavity with a diameter of 10mm. The center conductor 1-1-23 is a cylinder with a diameter of 3mm and a length of 6mm.

[0028] The flange of the microwave connector 1-2 is designed with inner screw holes 1-21, outer screw holes 1-23 and a rubber sealing ring 1-22, and the rubber sealing ring is located between the two sets of screw holes to achieve a sealing function. The inner screw holes are used to fasten the microwave connector and the microwave module into a microwave module as a whole 1 by screws, and 705 sealant is applied after fastening. The outer screw holes are used to fasten the microwave module as a whole 1 to the wall of the shielding box body by screws.

[0029] The length of the through-wall dielectric of microwave connector 1-2 is the same as that of through-wall transition section 1-1-2 of high-power microwave module, which is 10mm. The diameter of the through-wall dielectric is the same as the diameter of the air dielectric of through-wall transition section 1-1-2 and maintains a negative tolerance. In this example, the diameter of the through-wall dielectric is 9.8mm. The inner diameter of the through-wall conductor should be the same as the diameter of the central conductor of through-wall transition section 1-1-2 and maintain a reed structure. In this example, the inner diameter of the through-wall conductor is 3mm. The overall dimensions of the entire microwave connector are shown in .

Claims

1. A high-power microwave module through-wall sealed interconnection device, characterized in that: The invention comprises a high-power microwave module (1-1) and a microwave connector (1-2); the high-power microwave module (1-1) can pass through a box body wall (2) and protrude from the box body wall (2); the microwave connector (1-2) is fastened to the protruding high-power microwave module (1-1) by screws to form a microwave module as a whole (1); the microwave module as a whole (1) is first fastened to the box body wall (2) by screws and then fastened to the box body bottom plate.

2. A high-power microwave module through-wall sealed interconnection device according to claim 1, characterized in that: The high-power microwave module (1-1) and the microwave connector (1-2) are connected in a microwave coaxial pinhole form, wherein the end of the high-power microwave module (1-1) is a pin and the microwave connector (1-2) is a hole, and the two are interconnected to form a coaxial line structure.

3. A high-power microwave module through-wall sealed interconnection device according to claim 1, characterized in that: The high-power microwave module (1-1) comprises a microwave module body (1-1-1) and a through-wall transition section (1-1-2); the microwave module body (1-1-1) and the through-wall transition section (1-1-2) are an integrated structure and are integrally formed through mechanical processing.

4. A high-power microwave module through-wall sealed interconnection device according to claim 3, characterized in that: The through-the-wall transition section (1-1-2) is a microwave coaxial structure, including an outer conductor (1-1-21), an air medium (1-1-22), and a center conductor (1-1-23). ​​Its characteristic impedance should meet design requirements. The length of the through-the-wall transition section is 2 mm greater than the thickness of the box wall.

5. A high-power microwave module through-wall sealed interconnection device according to claim 1, characterized in that: The flange of the microwave connector (1-2) is designed with inner circle screw holes (1-21), outer circle screw holes (1-23) and a rubber sealing ring (1-22), the rubber sealing ring is located between the two groups of screw holes, the inner circle screw holes are fastened with screws and then coated with sealant, the through-wall length of the microwave connector (1-2) should be the same as the length of the through-wall transition section (1-1-2), the diameter of the dielectric layer should be the same as the diameter of the air dielectric of the through-wall transition section (1-1-2) and maintain a negative tolerance, and the inner diameter of the inner conductor should be the same as the diameter of the central conductor of the through-wall transition section (1-1-2) and adopt a reed structure.

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