CN210778900U

CN210778900U - Waveguide coaxial conversion joint

Info

Publication number: CN210778900U
Application number: CN201922343545.3U
Authority: CN
Inventors: 安玉伟; 葛俊祥; 米贤
Original assignee: Shenzhen Zkhx Science & Technology Co ltd
Current assignee: Shenzhen Zkhx Science & Technology Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-06-16
Anticipated expiration: 2029-12-23

Abstract

The utility model relates to a coaxial conversion joint of waveguide, including circular waveguide connecting piece and rectangular waveguide connecting piece for realize that low-loss conversion between circular waveguide and the rectangular waveguide is connected. A first adjusting part and a first adjusting matching mechanism for adjusting electromagnetic parameters are arranged in the circular waveguide connecting piece so as to adjust the matching condition between the waveguide coaxial conversion joint and the antenna; and a second adjusting piece and a second adjusting and matching mechanism for adjusting electromagnetic parameters are arranged in the rectangular waveguide connecting piece so as to adjust the matching condition between the waveguide coaxial conversion joint and the feed system. Through using the utility model provides a coaxial conversion joint of waveguide comes the conversion to connect circular waveguide and rectangular waveguide, and connected mode is simple, and the practicality is strong, and has reduced and has caused the loss because of connecting too much middleware, adjusts the matching condition through two regulating parts, and the regulative mode is simple and convenient.

Description

Waveguide coaxial conversion joint

Technical Field

The utility model relates to a microwave technical field especially relates to a coaxial conversion joint of waveguide.

Background

In the field of radio frequency microwaves, signals are mostly transmitted through radio frequency cables and waveguides. Among the widely used types of waveguides are mainly rectangular waveguides and circular waveguides. In practical engineering application, an application scenario that rectangular waveguides and circular waveguides are used for mutual matching transmission is often encountered, and in a traditional connection mode, two waveguides with different interfaces generally need to be connected and converted with each other through two waveguide coaxial converters and cables. Although the conventional connection method can realize signal conversion between the rectangular waveguide and the circular waveguide, the conventional connection method has poor practicability and large transmission loss when transmitting signals of related precision equipment such as radar due to many waveguide devices and complicated connection method.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a waveguide coaxial transition joint for solving the problems of complicated connection mode, poor practicability and large transmission loss of the conventional rectangular waveguide and circular waveguide.

A waveguide coaxial conversion joint comprises a circular waveguide connecting piece, wherein a first cavity is formed in the circular waveguide connecting piece, and the first cavity extends to one end of the circular waveguide connecting piece to form a first opening; the first adjusting piece extends into the first cavity through the first opening; the first adjusting and matching mechanism is used for matching with the first adjusting piece, so that the length of the first adjusting piece extending into the first cavity is adjustable; the rectangular waveguide connecting piece is connected with the circular waveguide connecting piece, a second cavity is formed in the rectangular waveguide connecting piece, one end of the second cavity is communicated with one end, away from the first opening, of the first cavity, the other end of the second cavity extends to one end of the rectangular waveguide connecting piece to form a standard interface for connecting the rectangular waveguide, and a second opening communicated with the second cavity is formed in the outer wall of the waveguide connecting piece; the second adjusting piece extends into the second cavity through the second opening and is arranged in parallel with the first adjusting piece; and the second adjusting and matching mechanism is used for matching with the second adjusting piece, so that the length of the second adjusting piece extending into the second cavity is adjustable.

The waveguide coaxial conversion joint comprises a circular waveguide connecting piece and a rectangular waveguide connecting piece which are connected in a closed mode, and the circular waveguide connecting piece and the rectangular waveguide connecting piece are respectively connected with a circular waveguide and a rectangular waveguide and used for realizing conversion connection between the circular waveguide and the rectangular waveguide which are not matched in interface. The utility model provides a joint's of coaxial conversion of waveguide connected mode is simple, and the connection between circular waveguide and rectangular waveguide only needs can realize through a converter, has reduced the loss that the connection middleware caused. A first adjusting piece for adjusting electromagnetic parameters is arranged in the circular waveguide connecting piece so as to adjust the matching condition between the waveguide coaxial conversion joint and the antenna; and a second adjusting piece for adjusting electromagnetic parameters is also arranged in the rectangular waveguide connecting piece so as to adjust the matching condition between the waveguide coaxial conversion joint and the whole feed system. Through the utility model provides a circular waveguide and rectangular waveguide are connected to the coaxial conversion joint of waveguide, and connected mode is comparatively simple, and the practicality is strong when the engineering is used to reduced and caused the loss because of connecting too much middleware. The matching condition between the waveguide coaxial conversion joint and the antenna and feed system is adjusted through the two adjusting pieces, and the adjusting mode is simple and efficient.

In one embodiment, the first adjusting and matching mechanism includes a ladder-type feeding fixing seat, and the ladder-type feeding fixing seat is connected with one end, far away from the first opening, of the circular waveguide connecting piece.

In one embodiment, the first adjusting element includes a feeding rod, and the feeding rod is fixed in the first cavity through the stepped feeding fixing seat and penetrates through the first cavity.

In one embodiment, one end of the feed rod connected with the feed fixing seat is provided with a thread, and the feed rod is connected with the feed fixing seat through the matched thread on the feed fixing seat to form a threaded connection.

In one embodiment, the first cavity comprises a cylindrical cavity matching the shape of the feed rod.

In one embodiment, the stepped feed fixing seat is a multi-stage circular arc stepped structure, and the centers of the circular arc steps are collinear and located on the center line of the cylindrical cavity.

In one embodiment, the circular waveguide connector is a cylindrical structure, and the waveguide coaxial conversion joint further comprises a plurality of reinforcing ribs with strip structures extending along the length direction of the cylindrical wall.

In one embodiment, the second adjusting member includes an adjusting screw, and the second adjusting engagement mechanism includes a thread provided on a hole wall of the second opening and matching with the adjusting screw.

In one embodiment, the second cavity comprises a rectangular cavity matching the shape of the rectangular waveguide.

In one embodiment, the interface comprises a flange, the flange is communicated with the interface, a clamping table is arranged on one surface of the flange, which is far away from the interface, and the waveguide connecting piece is fixedly connected with the waveguide through the flange and the clamping table.

Drawings

Fig. 1 is a schematic cross-sectional view of an overall structure of a waveguide coaxial transition joint according to an embodiment of the present invention;

FIG. 2 is a front view of the waveguide coaxial transition joint of FIG. 1;

FIG. 3 is a left side view of the waveguide coaxial transition joint of FIG. 1;

FIG. 4 is a right side view of the waveguide coaxial transition joint of FIG. 1;

FIG. 5 is a top view of the waveguide coaxial transition joint of FIG. 1;

FIG. 6 is a bottom view of the waveguide coaxial transition joint of FIG. 1;

FIG. 7 is a schematic view of the overall structure of the waveguide coaxial transition joint shown in FIG. 1;

fig. 8 is an overall structural diagram of another angle of the waveguide coaxial transition joint shown in fig. 1.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "upper," "lower," "front," "rear," "circumferential," and the like are based on the orientation or positional relationship shown in the drawings and are intended to facilitate the description of the invention and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 is the utility model discloses the overall structure section schematic diagram of the coaxial conversion joint of waveguide of one of them embodiment, fig. 2 to fig. 6 are respectively the utility model discloses the coaxial conversion joint's of waveguide front view, left side view, right side view, top view and the bottom view of one of them embodiment, fig. 7 and fig. 8 are respectively the utility model discloses the coaxial conversion joint of waveguide of one of them embodiment is from the overall structure schematic diagram of observing in different angles. Referring to fig. 1, the waveguide coaxial switching joint 10 includes a circular waveguide connector 100, a first adjuster 130, a first adjustment fitting mechanism 140, a rectangular waveguide connector 200, a second adjuster 240, and a second adjustment fitting mechanism 250. A first cavity 110 is opened inside the circular waveguide connector 100, the first cavity 110 extends to one end of the circular waveguide connector 100, and a first opening 120 is formed at the port of the circular waveguide connector 100. The first adjusting member 130 extends into the first cavity 110 through the first opening 120. The first adjusting member 130 is matched with the first adjusting matching mechanism 140, so that the length of the part of the first adjusting member 130 extending into the first cavity 110 is adjustable.

The rectangular waveguide connector 200 is integrally connected with the circular waveguide connector 100, and a second cavity 210 is formed in the rectangular waveguide connector 200. One end of the second cavity 210 is connected to the end of the first cavity 110 away from the first opening 120, and the other end extends to one end of the rectangular waveguide connector 200, and a port 220 for connecting a rectangular waveguide is formed at the port of the rectangular waveguide connector 200. The outer wall of the rectangular waveguide connector 200 defines a second opening 230 communicating with the second cavity 210. A second adjusting member 240 extends into the second cavity 210 through the second opening 230, and the second adjusting member 240 is disposed parallel to the first adjusting member. The second adjustment fitting mechanism 250 is adapted to fit with the second adjustment member 240, so that the length of the portion of the second adjustment member 240 extending into the second cavity 210 is adjustable.

The utility model provides a pair of coaxial conversion joint 10 of waveguide includes circular waveguide connecting piece 100 and rectangular waveguide connecting piece 200, is used for connecting circular waveguide and rectangular waveguide respectively to realize that the unmatched circular waveguide of interface and the conversion between the rectangular waveguide are connected. The waveguide coaxial conversion joint 10 is designed in an integrated mode, the circular waveguide and the rectangular waveguide are only required to be connected with one waveguide coaxial conversion joint 10, conversion connection can be achieved, the connection mode is simple, the practicability is high, and loss caused by a conversion intermediate device is reduced. The circular waveguide connecting piece 100 comprises a first cavity 110, and a first adjusting piece 130 is arranged in the first cavity 110 and used for realizing matching between the waveguide coaxial switching joint 10 and an antenna. The first adjusting member 130 adjusts the length of the first adjusting mechanism 140 extending into the first cavity 110 to adjust the electromagnetic parameters, so as to adjust the matching degree between the waveguide coaxial switching joint 10 and the antenna. Similarly, the rectangular waveguide connector 200 includes a second cavity 210, and a second adjusting member 240 is disposed in the second cavity 210 for matching the waveguide coaxial transition joint 10 with the entire feed system. The second adjusting member 240 adjusts the length of the second adjusting mechanism 250 extending into the second cavity 210 to adjust the electromagnetic parameters, so as to adjust the matching degree between the waveguide coaxial switching joint 10 and the whole feeding system. The matching condition between the waveguide coaxial switching joint 10 and the antenna and feed system is adjusted through the two adjusting pieces, and the adjusting mode is simple and convenient.

In one embodiment, the first adjusting mechanism 140 includes a ladder-type feeding fixing seat for fixing the first adjusting member 130 in the first cavity 110. The ladder-type feed fixing seat is connected with one end of the circular waveguide connector 100 far away from the first opening 120. The step-type feed fixing seat is connected with the circular waveguide connecting piece 100 in a seamless embedded mode, so that the phenomenon of effective signal leakage caused by certain gaps is effectively avoided, accurate transmission and effective conversion of signals are guaranteed, and the reliability of the waveguide coaxial conversion joint 10 is improved.

Referring to fig. 1 and 4, in this embodiment, the stepped feed fixing base is a multi-stage circular arc stepped structure, and centers of circular arc steps of each stage are collinear and located on a center line of the cylindrical cavity. The ladder-type feed fixing seat is provided with one end of a multi-stage circular arc ladder structure and is positioned at the communication junction of the first cavity 110 and the second cavity 210, the ladder height of the ladder mechanism is matched with the wavelength of electromagnetic waves transmitted in the waveguide coaxial conversion joint 10 to play a role of impedance matching, and therefore the transmission conversion of signals between the circular waveguide and the rectangular waveguide is completed.

In one embodiment, the first adjusting element 130 includes a feeding rod, one end of which is inserted into the stepped feeding holder, and the feeding rod is fixed inside the first cavity 110 by the stepped feeding holder and penetrates the first cavity 110 along the axial direction of the circular waveguide connector 100. The feed rod is used for adjusting electromagnetic parameters in the circular waveguide connecting piece 100, so that the matching degree between the waveguide coaxial conversion joint 10 and the antenna is adjusted.

In one embodiment, the outer surface of one end of the feed rod connected with the feed fixing seat is provided with threads. The ladder type feed fixing seat is also provided with a thread at one end connected with the feed rod. The feed rod and the stepped feed fixing seat form threaded connection through matched threads. The feed rod can adjust the length of the feed rod extending into the first cavity 110 by adjusting the threaded connection with the stepped feed fixing seat, so as to adjust the matching degree between the waveguide coaxial conversion joint 10 and the antenna, and adjust the electromagnetic parameters of the waveguide coaxial conversion joint 10, wherein the electromagnetic parameters include the standing wave coefficient, the gain and the like of the antenna.

In one embodiment, the first cavity 110 comprises a cylindrical cavity that matches the shape of the feed rod. The radial diameter of the cylindrical cavity is larger than the outer diameter of the feed rod, so as to ensure that the feed rod can freely adjust the extending length in the first cavity 110, thereby realizing the adjustment of electromagnetic parameters.

Referring to fig. 7 and 8, in this embodiment, the circular waveguide connector 100 is a cylindrical structure, and the waveguide coaxial conversion joint 10 further includes a plurality of reinforcing ribs 150 with a strip structure extending along the length direction of the cylindrical wall. Since the cylindrical waveguide connector 100 has a long length extending in the axial direction, the overhang surface span from the connection between the circular waveguide connector 100 and the rectangular waveguide connector 200 is too large. In order to strengthen the load that the connecting surface can bear, a plurality of reinforcing ribs 150 with a strip structure are arranged along the length direction of the cylinder wall of the circular waveguide connecting piece 100, so that the stability of the waveguide coaxial switching joint 10 is improved.

In one embodiment, the second adjustment member 140 includes an adjustment screw. The adjusting screw extends into the second cavity 210 from the second opening 230 formed on the outer wall of the rectangular waveguide connector 200. The second adjustment matching mechanism 250 is arranged on the hole wall of the second opening 230. The second adjustment fitting mechanism 250 includes threads that mate with the adjustment screw. The adjusting screw and the second adjusting and matching mechanism 250 form a threaded connection through matching threads. The adjusting screw can adjust the length of the adjusting screw extending into the second cavity 210 by adjusting the threaded connection with the second adjusting and matching mechanism 250, so as to adjust the matching degree between the waveguide coaxial transformation joint 10 and the whole feeding system, and adjust the electromagnetic parameters of the waveguide, including the standing wave coefficient and gain of the waveguide, etc.

In one embodiment, the second cavity 210 forms an interface 220 at an end of the rectangular waveguide connector 200 remote from the circular waveguide connector 100. The interface 220 is used for butting the waveguide to realize connection conversion with the waveguide. In this embodiment, the waveguide is a rectangular waveguide, and the inner cavity of the rectangular waveguide is a rectangular inner cavity. The second cavity 210 is a rectangular cavity matching with the shape of the inner cavity of the rectangular waveguide, so as to realize seamless butt joint of the rectangular waveguide connector 200 and the rectangular waveguide.

Referring to fig. 7 and 8, in this embodiment, the interface 220 includes a flange 221, the flange 221 has a rectangular opening at the center thereof, the rectangular opening is matched with the interface in shape, and the flange 221 is in seamless communication with the interface 220. The flange 221 is provided with a plurality of mounting holes, and the mounting holes are respectively arranged at four corners of the flange 221. The position of the mounting hole corresponds to the position of the mounting hole on the waveguide interface. When the rectangular waveguide is connected, a mounting screw passes through a mounting hole on the rectangular waveguide and a mounting hole on the flange 221 to match with a mounting nut, so that seamless connection between the rectangular waveguide and the rectangular waveguide connecting piece 200 is realized. In order to further secure the connection between the two, a snap-fit platform 222 is disposed on a side of the flange 221 facing away from the interface 220. When the rectangular waveguide is connected with the rectangular waveguide connector 200, the interface of the rectangular waveguide is clamped and fixed by the clamping table 222, so that the connection stability between the rectangular waveguide and the rectangular waveguide connector 200 is further ensured.

When using the utility model provides a waveguide coaxial switching joint 10 to connect the unmatched circular waveguide of interface and rectangular waveguide, will circular waveguide with waveguide coaxial switching joint 10 circular waveguide connecting piece 100 connects, will rectangular waveguide with waveguide coaxial switching joint 10 rectangular waveguide connecting piece 200 connects. Different from the conversion mode that needs respectively to connect a converter and pass through cable junction again between traditional circular waveguide and rectangular waveguide, through using the utility model provides a coaxial conversion joint 10 of waveguide only needs to pass through an intermediate device, can realize circular waveguide with the connection conversion between the rectangular waveguide. Use the utility model provides a coaxial conversion joint 10 connected mode of waveguide is simple, has improved the practicality in the engineering, has reduced the unnecessary loss that the electromagnetic wave caused when transmitting between a plurality of middleware simultaneously. The circular waveguide connecting piece 100 of the waveguide coaxial switching joint 10 is provided with a first cavity 110 with a cylindrical cavity, and a feeding rod with a tubular structure is arranged in the first cavity 110. The feed rod is an electromagnetic parameter adjusting device of the circular waveguide connecting piece 100. The feed rod is matched with the stepped feed fixing seat in a threaded connection mode to adjust the length of the feed rod extending into the first cavity 110, so that the matching condition between the waveguide coaxial conversion joint 10 and the antenna can be adjusted. The rectangular waveguide connecting piece 200 of the waveguide coaxial conversion joint 10 is provided with a second cavity 210 of a rectangular cavity, and the outer wall of the rectangular waveguide connecting piece 200 is provided with a second opening 230 communicated with the second cavity 210. An adjusting screw extends into the second cavity 210 through the second opening 230, and the adjusting screw is in fit connection with a thread arranged on the second opening 230 to adjust the length of the adjusting screw extending into the second cavity 210, so as to adjust the matching condition between the waveguide coaxial switching joint 10 and the whole feed system. Use the utility model provides a coaxial conversion joint 10 of waveguide realizes right during circular waveguide and rectangular waveguide's connection conversion, connected mode is simple, and the conversion middleware of process is less, so less to the microwave signal loss of transmission. The matching condition between the waveguide coaxial conversion joint 10 and the antenna and the feed system can be adjusted by the length of the feed rod and the adjusting screw of the waveguide coaxial conversion joint 10 extending into the cavity of the waveguide coaxial conversion joint 10, and the adjusting mode is simple.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A waveguide coaxial transition joint, comprising:

the circular waveguide connecting piece is internally provided with a first cavity, and the first cavity extends to one end of the circular waveguide connecting piece to form a first opening;

the first adjusting piece extends into the first cavity through the first opening;

the first adjusting and matching mechanism is used for matching with the first adjusting piece, so that the length of the first adjusting piece extending into the first cavity is adjustable;

the rectangular waveguide connecting piece is connected with the circular waveguide connecting piece, a second cavity is formed in the rectangular waveguide connecting piece, one end of the second cavity is communicated with one end, away from the first opening, of the first cavity, the other end of the second cavity extends to one end of the rectangular waveguide connecting piece to form a standard interface for connecting the rectangular waveguide, and a second opening communicated with the second cavity is formed in the outer wall of the waveguide connecting piece;

the second adjusting piece extends into the second cavity through the second opening and is arranged in parallel with the first adjusting piece;

and the second adjusting and matching mechanism is used for matching with the second adjusting piece, so that the length of the second adjusting piece extending into the second cavity is adjustable.

2. The waveguide coaxial transition joint of claim 1, wherein the first adjustment matching mechanism comprises a ladder-type feed fixing seat, and the ladder-type feed fixing seat is connected with one end of the circular waveguide connecting piece away from the first opening.

3. The waveguide coaxial transition joint of claim 2, wherein the first adjusting member comprises a feed rod, and the feed rod is fixed in the first cavity through the stepped feed fixing seat and penetrates through the first cavity.

4. The waveguide coaxial transition joint of claim 3, wherein the end of the feed rod connected with the feed fixing base is provided with a thread, and the feed rod is connected with the feed fixing base through the matched thread on the feed fixing base to form a threaded connection.

5. The waveguide coaxial transition joint of claim 4, wherein the first cavity comprises a cylindrical cavity matching a shape of the feed rod.

6. The waveguide coaxial transition joint of claim 5, wherein the stepped feed fixing seat is a multi-stage circular-arc stepped structure, and the centers of the circular-arc steps are collinear and located on the center line of the cylindrical cavity.

7. The waveguide coaxial transition joint of claim 5, wherein the circular waveguide connector is a cylindrical structure, and further comprising a plurality of ribs of a bar structure extending along a length of the cylindrical wall.

8. The waveguide coaxial transition joint of claim 1, wherein the second adjustment member comprises an adjustment screw, and the second adjustment engagement mechanism comprises a thread disposed on a wall of the second opening that mates with the adjustment screw.

9. The waveguide coaxial transition joint of claim 1, wherein the second cavity comprises a rectangular cavity matching a shape of a rectangular waveguide.

10. The waveguide coaxial transition joint of claim 1, wherein the interface comprises:

the flange, with the interface intercommunication, the flange deviates from the one side of interface is equipped with the buckle platform, the waveguide connecting piece passes through the flange with the buckle platform is connected fixedly with the waveguide.