Coaxial waveguide converter

Abstract

The utility model discloses a coaxial waveguide converter, and belongs to the technical field of microwave passive devices. The novel coaxial waveguide converter comprises a waveguide cavity and further comprises a matching cover plate, the matching cover plate is installed on the waveguide cavity, a coaxial connector shell is horizontally inserted in one side of the waveguide cavity, a coaxial connector jack is horizontally inserted in the other side of the waveguide cavity, and the coaxial connector shell is connected with the coaxial connector jack. The coaxial connector shell and the coaxial connector jack are respectively arranged at two sides of the waveguide cavity, the axes of the coaxial connector shell and the coaxial connector jack coincide, the coaxial connector shell and the waveguide cavity are welded into a whole through silver brazing to form a combined body, an insulating medium in a traditional coaxial connector is removed, a pure air medium structure is adopted, and the coaxial connector shell and the coaxial connector jack are integrated to form the combined body. The coaxial waveguide converter is ensured to be stable in electrical performance index and reliable in mechanical performance in a high-temperature environment above 400 DEG C.

Description

Technical Field

[0001] The utility model relates to the technical field of microwave passive devices, in particular to a coaxial waveguide converter. Background Art

[0002] With the continuous development of satellite communications, the requirements for communication quality are becoming increasingly stringent. Coaxial waveguide converters, as a key microwave component for converting between RF coaxial ports and waveguide ports, play a vital role in communication systems. They are particularly widely used in the military missile-borne field. Due to their unique environmental requirements, coaxial waveguide converters are also developing in the direction of high frequency, high power, high temperature resistance, and high reliability.

[0003] Conventional devices using insulating plastic dielectrics as the medium have a maximum long-term operating temperature of 250°C for conventional RF connections. In environments exceeding 400°C, the dielectric will melt, and the electrical performance of the components will fail, making them unable to meet future needs. Therefore, a new type of high-temperature resistant coaxial waveguide converter can overcome the limitations of traditional structures and achieve higher-level temperature resistance and high reliability requirements for electrical performance in high-temperature environments. Utility Model Content

[0004] The purpose of the utility model is to overcome the problems in the prior art and provide a coaxial waveguide converter to ensure that the electrical performance indicators of the coaxial waveguide converter are stable and the mechanical performance is reliable in a high temperature environment above 400°C.

[0005] The utility model provides a coaxial waveguide converter, comprising a waveguide cavity and a matching cover plate, wherein the matching cover plate is mounted on the waveguide cavity, a coaxial connector housing is horizontally inserted on one side of the waveguide cavity, and a coaxial connector jack is horizontally inserted on the other side of the waveguide cavity, the coaxial connector jack is horizontally inserted through the matching cover plate, the coaxial connector housing and the coaxial connector jack are respectively arranged on both sides of the waveguide cavity, and the axes of the two coincide.

[0006] Preferably, the coaxial connector housing and the waveguide cavity are welded together by silver brazing.

[0007] Preferably, a through hole is provided on the matching cover plate, and the coaxial connector jack is press-fitted into the through hole. The through hole consists of two parts, one part is press-fitted with the coaxial connector jack rod body, and the other part is press-fitted with the tail protrusion of the coaxial connector jack.

[0008] Preferably, the coaxial connector jack is press-fitted onto the matching cover, and the coaxial connector jack and the matching cover are laser-welded into one.

[0009] Preferably, six mounting holes are formed on the matching cover plate and the waveguide cavity, and fastening screws are threadedly inserted into the six mounting holes.

[0010] Preferably, a base is provided at the bottom of the waveguide cavity, and a mounting through hole is provided on the base.

[0011] Preferably, one end is a coaxial port and the other end is a waveguide port, the coaxial port is connected to the coaxial connector housing, and the waveguide port is installed on the base to play a conversion connection role.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the coaxial waveguide converter structure of the present invention breaks through the structural limitations of traditional RF coaxial connectors. By removing the insulating plastic medium that must exist inside the traditional coaxial connector, the coaxial connector jack is fixed as the inner conductor on the metal waveguide cavity, effectively solving the problem of temperature limitation caused by the insulating plastic medium, ensuring that the electrical performance indicators of the coaxial connector are stable and the mechanical performance is reliable in a high temperature environment above 400°C, solving the engineering difficulty problem in special application fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall explosion structure of the utility model.

[0014] Figure 2 This is a left view of the coaxial waveguide converter of the present invention after installation.

[0015] Figure 3 This is the right side view of the coaxial waveguide converter of the present invention after installation.

[0016] Figure 4 This is a bottom schematic diagram of the coaxial waveguide converter of the present invention after installation.

[0017] Figure 5 for Figure 4 AA cross-sectional structural diagram.

[0018] Explanation of the accompanying reference numerals: 1. Waveguide cavity; 2. Coaxial connector housing; 3. Matching cover; 4. Fastening screw; 5. Coaxial connector jack; 7. Card block; 8. Card slot; 9. Base; 10. Mounting hole. DETAILED DESCRIPTION

[0019] The following is combined with Figures 1 to 5In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the utility model belongs.

[0020] The words “first”, “second” and similar words used in the specification and claims of the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as “include” or “comprise” mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. “Inside”, “outside”, “upper”, “lower”, “far”, “near”, “front”, “back” and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. The drawings in this disclosure are not drawn strictly according to the actual scale. The specific size and quantity of each structure can be determined according to actual needs. The drawings described in this disclosure are only schematic structural diagrams.

[0021] The utility model provides a coaxial waveguide converter, including a waveguide cavity 1 and a matching cover plate 3. The matching cover plate 3 is installed on the waveguide cavity 1. A coaxial connector housing 2 is horizontally inserted on one side of the waveguide cavity 1, and a coaxial connector jack 5 is horizontally inserted on the other side of the waveguide cavity 1. The coaxial connector jack 5 is horizontally inserted through the matching cover plate 3. The coaxial connector housing 2 and the coaxial connector jack 5 are respectively arranged on both sides of the waveguide cavity 1, and the axes of the two coincide.

[0022] The coaxial waveguide converter structure of the utility model breaks through the structural limitations of traditional RF coaxial connectors. By removing the insulating plastic medium that must exist inside the traditional coaxial connector, the coaxial connector jack is fixed on the metal waveguide cavity as the inner conductor, effectively solving the problem of temperature limitation caused by the insulating plastic medium. It ensures that the electrical performance indicators of the coaxial connector are stable and the mechanical performance is reliable in high-temperature environments above 400°C, solving the engineering difficulty problem in special application fields.

[0023] By removing the internal insulating medium of the traditional coaxial connector and adopting a pure air dielectric structure, the coaxial waveguide converter is guaranteed to have stable electrical performance indicators and reliable mechanical performance in high-temperature environments above 400°C. The coaxial waveguide converter structure breaks through the structural limitations of traditional RF coaxial connectors and removes the insulating medium that was previously required in coaxial connectors. The inner conductor is fixed on the metal waveguide cavity, effectively solving the problem of temperature restrictions caused by the insulating plastic medium.

[0024] The RF coaxial connector includes a coaxial connector housing 2 (as an outer conductor) and a coaxial connector jack 5 (as an inner conductor). The coaxial connector housing 2 is fixed to the waveguide cavity 1 by silver brazing, and the jack is press-fitted with the matching cover plate 3 and then installed into the waveguide cavity 1 by laser welding to form the inner conductor of the coaxial connector.

[0025] The coaxial connector housing 2 and the waveguide cavity are fixed by high-temperature silver brazing, and the temperature resistance can reach above 500°C, meeting all current special high-temperature environment requirements.

[0026] By removing the insulating dielectric from traditional coaxial connectors and adopting a pure air dielectric structure, the coaxial waveguide converter maintains stable electrical performance and reliable mechanical properties in high-temperature environments exceeding 400°C. This structure overcomes the structural limitations of traditional RF coaxial connectors by eliminating the required insulating dielectric. The inner conductor is fixed to the metal waveguide cavity 1, effectively resolving the temperature limitations imposed by the insulating plastic dielectric. Currently, the maximum long-term operating temperature of conventional RF link dielectrics on the market is 250°C. Above 400°C, conventional dielectrics melt, and the electrical performance of components fails. This new coaxial waveguide converter structure effectively addresses the high-temperature requirements above 400°C, resolving the engineering challenges inherent in specialized applications.

[0027] Preferably, the coaxial connector housing 2 and the waveguide cavity 1 are silver brazed together, a through hole is provided on the matching cover 3, the coaxial connector jack 5 is pressed into the through hole, the coaxial connector jack 5 is pressed onto the matching cover 3, the coaxial connector jack 5 and the matching cover 3 are laser welded together, the through hole consists of two parts, one part is pressed into fit with the coaxial connector jack rod body, and the other part is fit with the tail protrusion of the coaxial connector jack.

[0028] Silver brazing is used to weld the waveguide cavity 1 and the coaxial connector housing 2 into one. Since silver brazing has a certain fluidity, it will make the two more tightly integrated and will not produce gaps that affect subsequent conduction. Laser welding uses spot welding, which may cause welding gaps between the two during welding, affecting subsequent conduction. Therefore, the utility model uses silver brazing to weld the waveguide cavity 1 and the coaxial connector housing 2 into one.

[0029] The through hole is provided with two parts, one part is tightly pressed with the rod body of the coaxial connector jack 5, and the other part is matched with the tail protrusion of the coaxial connector jack 5 to facilitate welding the coaxial connector jack 5 and the matching cover plate 3 into one by laser welding.

[0030] The coaxial connector jack 5 and the matching cover 3 adopt mechanical crimping and laser welding technology to ensure that the inner conductor and the matching cover 3 are strong and reliable. At the same time, the laser welding technology can ensure that the temperature resistance reaches above 800℃, meeting all current special high-temperature environment requirements.

[0031] Furthermore, the inner conductor of the coaxial connector is fixed on the matching cover 3 and does not need to be supported and fixed to the coaxial connector housing 2 by an insulating medium, which makes it more convenient to use.

[0032] Preferably, a card block 7 is provided on the side of the matching cover 3 close to the waveguide cavity 1, and a card slot 8 matching the card block 7 is provided on the waveguide cavity 1. The coaxial connector jack 5 is inserted into the matching cover 3 and compacted into one with it. Six mounting holes are provided on the matching cover 3 and the waveguide cavity 1, and fastening screws 4 are threadedly inserted into the six mounting holes.

[0033] The matching cover 3 and the waveguide cavity are fastened with 6 screws to ensure a firm and reliable connection.

[0034] Preferably, a base 9 is provided at the bottom of the waveguide cavity 1, and a mounting through hole 10 is opened on the base 9. The coaxial waveguide converter includes a radio frequency coaxial connector and a waveguide cavity 1, which are combined to form a coaxial waveguide converter microwave passive device. The coaxial port is connected to the coaxial connector housing 2, and the waveguide port is installed on the base 9 to play a conversion connection role.

[0035] The assembled coaxial waveguide converter is installed at the location of use through the installation through hole on the base 9.

[0036] The method of using the coaxial waveguide converter of the present utility model is as follows:

[0037] First, the coaxial connector housing 2 is inserted into the waveguide cavity 1, and then the connection between the coaxial connector housing 2 and the waveguide cavity 1 is silver brazed into an integrated structure. Then, the coaxial connector jack 5 is press-fitted onto the cover plate 3.

[0038] The matching cover plate 3 is buckled onto the waveguide cavity 1 and the clamping block 7 is clamped in the clamping slot. At this time, the coaxial connector jack 5 and the coaxial connector housing 2 are collinear. At this time, the matching cover plate 3 is connected to the waveguide cavity 1 by tightening the screws. Finally, the matching cover plate 3 and the coaxial connector jack 5 are fixed as one by laser welding.

[0039] The utility model relates to a coaxial waveguide converter structure. The structure mainly removes the internal insulating medium of a traditional coaxial connector and adopts a pure air medium structure to ensure that the electrical performance indicators of the coaxial waveguide converter are stable and the mechanical performance is reliable in a high temperature environment above 400°C.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coaxial waveguide converter, comprising a waveguide cavity (1), characterized in that: Also includes: A matching cover plate (3) is mounted on the waveguide cavity (1); A coaxial connector housing (2) is horizontally inserted on one side of the waveguide cavity (1); A coaxial connector jack (5) is inserted horizontally through the matching cover plate (3), the coaxial connector jack (5) is inserted horizontally on one side of the waveguide cavity (1), the coaxial connector housing (2) and the coaxial connector jack (5) are respectively arranged on both sides of the waveguide cavity (1), and the axes of the two coincide.

2. A coaxial waveguide converter according to claim 1, characterized in that: The coaxial connector housing (2) and the waveguide cavity (1) are welded together by silver brazing.

3. The coaxial waveguide converter according to claim 1, wherein: The matching cover plate (3) is provided with a through hole, and the coaxial connector jack (5) is press-fitted into the through hole. The through hole is composed of two parts, one part is press-fitted with the rod body of the coaxial connector jack (5), and the other part is press-fitted with the tail protrusion of the coaxial connector jack (5).

4. The coaxial waveguide converter according to claim 1, wherein: The coaxial connector jack (5) and the matching cover plate (3) are integrated by laser welding.

5. The coaxial waveguide converter according to claim 1, wherein: Six mounting holes are provided on the matching cover plate (3) and the waveguide cavity (1), and fastening screws (4) are threadedly inserted into the six mounting holes.

6. The coaxial waveguide converter according to claim 1, wherein: A base (9) is provided at the bottom of the waveguide cavity (1), and a mounting through hole (10) is provided on the base (9).

7. A coaxial waveguide converter according to claim 6, characterized in that: One end is a coaxial port, and the other end is a waveguide port. The coaxial port is connected to the coaxial connector housing (2), and the waveguide port is installed on the base (9) to play a role in conversion connection.

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