CN216145755U

CN216145755U - Waveguide with radio frequency choke

Info

Publication number: CN216145755U
Application number: CN202122064266.0U
Authority: CN
Inventors: 胡南
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-03-29
Anticipated expiration: 2031-08-30

Abstract

The utility model discloses a waveguide with radio frequency choking, and relates to the technical field of communication devices. The waveguide comprises a waveguide body, a waveguide cavity is formed in the waveguide body, openings are formed in two ends of the waveguide cavity, a plurality of protruding structures used for radio frequency choking are arranged on two end faces of the waveguide body along the circumference of each opening, and the protruding structures extend in the axial direction of the waveguide. The waveguide is provided with a plurality of protruding structures on the flange, when the waveguide is connected with the flange on other parts through the flange, the waveguide can form radio frequency choking, is particularly suitable for a frequency band with higher frequency, so as to eliminate the requirement of perfect mechanical contact, avoid the abrasion of a surface metal coating close to the opening surface of the waveguide caused by long-term installation and disassembly of a traditional contact type flange plate, and avoid high return loss and insertion loss caused by abrasion, thereby increasing the durability of the opening surface of the waveguide and improving the repeatability and consistency of measurement.

Description

Waveguide with radio frequency choke

Technical Field

The utility model relates to the technical field of waveguides for communication, in particular to a waveguide with radio frequency choking.

Background

As a key structural member for electromagnetic wave transmission, a waveguide has been widely used in the fields of radio communication, radar, navigation, and the like. The waveguide is a hollow metal tube made of copper, aluminum and other metals, and therefore, like a common engineering pipeline, the waveguide also has the connection requirements among different pipelines. However, since the waveguide plays a role in microwave signal transmission and has strict requirements for electrical performance index, reliability, and the like, the waveguide has very high requirements for dimensional accuracy and form and position accuracy in connection. At present, the common connection mode of the waveguide is flange connection, so that connecting flange discs are generally welded on two end faces of the waveguide, but when the waveguide is connected with flanges on other parts through the flanges, return loss and high insertion loss can be caused, and signal transmission is influenced.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is how to provide a waveguide which can reduce return loss and high insertion loss and has a radio frequency choking effect.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a waveguide with radio frequency choke, characterized by: the radio frequency choke circuit comprises a waveguide body, wherein a waveguide cavity is formed in the waveguide body, openings are formed at two ends of the waveguide cavity, a plurality of protruding structures for radio frequency choke are arranged on two end faces of the waveguide body along the circumference of the openings, and the protruding structures extend along the axial direction of the waveguide; flanges are formed at two ends of the waveguide body, mounting holes and positioning holes are formed in the flanges, a groove is formed in the waveguide body outside the opening, the protruding structure is located in the groove, and the end face of the outer side of the protruding structure is located on the inner side of the end face of the waveguide body or flush with the end face of the waveguide body; the outer end face of the flange is arranged inwards relative to the outer end face of the waveguide body; the mounting holes and the positioning holes in the flange are arranged at intervals, positioning pins are arranged in the positioning holes of the flange, and the positioning pins are used for positioning when the waveguide is connected with other components.

The further technical scheme is as follows: four mounting holes and four positioning holes are formed in each flange plate, the mounting holes and the positioning holes are arranged at equal intervals, positioning pins are formed in two positioning holes of each flange plate, and a connecting line between two positioning pins on one flange plate is crossed with a connecting line between two positioning pins on the other flange plate.

Preferably, the protruding structures are cylindrical, and the protruding structures are regularly arranged.

Preferably, the protruding structures are rectangular, and the protruding structures are regularly arranged.

Preferably, the convex structures are fan-shaped, and the convex structures are regularly arranged.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the plurality of protruding structures are formed on the flange of the waveguide, when the waveguide is connected with flanges on other parts through the flanges, radio frequency choking can be formed, the waveguide is particularly suitable for a frequency band with higher frequency, the requirement of perfect mechanical contact is eliminated, the abrasion of a surface metal coating close to the opening surface of the waveguide, caused by long-term installation and disassembly of the traditional contact type flange, and high return loss and insertion loss caused by abrasion are avoided, the durability of the opening surface of the waveguide can be improved, and the repeatability and the consistency of measurement are improved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of a first configuration of a waveguide according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is a schematic cross-sectional view of the waveguide of FIG. 1;

FIG. 4 is a side view of the waveguide of FIG. 1;

FIG. 5 is a schematic view of a second configuration of a waveguide according to an embodiment of the present invention;

FIG. 6 is an enlarged schematic view of the structure at B in FIG. 5;

FIG. 7 is a schematic cross-sectional view of the waveguide of FIG. 5;

FIG. 8 is a side view of the waveguide of FIG. 5;

FIG. 9 is a schematic cross-sectional view of a third waveguide in accordance with an embodiment of the present invention;

FIG. 10 is a side view of the third waveguide of FIG. 9;

wherein: 1. a waveguide body; 2. a waveguide cavity; 3. a raised structure; 4. a flange plate; 5. mounting holes; 6. positioning holes; 7. and positioning the pin.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

As shown in fig. 1 to 10, an embodiment of the present invention discloses a waveguide with a radio frequency choke, where the waveguide includes a waveguide body 1, the waveguide body is made of a metal material, and a specific material for making the waveguide body may be a material used in the prior art, which is not described herein again; a waveguide cavity 2 is formed in the waveguide body 1, openings are formed at two ends of the waveguide cavity 2, preferably, the waveguide cavity 2 can be rectangular or cylindrical, and the specific shape can be set according to actual needs; a plurality of protruding structures 3 for radio frequency choke are arranged on two end faces of the waveguide body 1 along the circumference of the opening, and the protruding structures 3 extend along the axial direction of the waveguide.

The specific forms of the convex structures 3 are at least three types as follows:

first, as shown in fig. 1 to 4, the protruding structures 3 are cylindrical, and the protruding structures 3 are regularly arranged.

Secondly, as shown in fig. 5 to 8, the protruding structures 3 are rectangular, and the protruding structures 3 are regularly arranged.

Third, as shown in fig. 9-10, the convex structures 3 have a fan shape, and the convex structures 3 are regularly arranged.

It should be noted that the specific form of the protruding structure 3 may also be other forms as long as the function of the radio frequency choke can be achieved.

Further, flanges 4 are formed at two ends of the waveguide body 1, and mounting holes 5 and positioning holes 6 are formed on the flanges 4; as shown in fig. 1, 5 and 10, a groove is formed on the waveguide body 1 outside the opening, the protruding structure 3 is located in the groove, and the outer end face of the protruding structure 3 is located inside or flush with the end face of the waveguide body, that is, the protruding structure 3 is also arranged on the principle that it cannot interfere with the installation of the flange, the specific shape of the flange 4 can be selected in many ways, for example, circular or square, and the shape of the flange can be arranged according to the specific structure of the flange in other components to be connected.

Further, as shown in fig. 3, 7 and 9, the outer end surface of the flange 4 is disposed inwardly with respect to the outer end surface of the waveguide body 1.

Further, as shown in fig. 1, 5 and 10, the mounting holes 5 and the positioning holes 6 on the flange plate 4 are arranged at intervals, and a positioning pin 7 is mounted in each positioning hole of the flange plate 4, and the positioning pin 7 is used for positioning when the waveguide is connected with other components. Preferably, four mounting holes 5 and four positioning holes 6 are formed in each flange 4, and the mounting holes 5 and the positioning holes 6 are arranged at equal intervals, it should be noted that the specific number of the mounting holes 5 and the positioning holes 6 may be other numbers, which is not described herein again; positioning pins 7 are formed in the two positioning holes 6 of each flange plate 4, wherein a connecting line between the two positioning pins 7 on one flange plate 4 is crossed with a connecting line between the two positioning pins 7 on the other flange plate 4, it should be noted that the number of the positioning pins 7 may be other numbers, such as one or three, which is not described herein.

Claims

1. A waveguide with radio frequency choke, characterized by: the waveguide comprises a waveguide body (1), wherein a waveguide cavity (2) is formed in the waveguide body (1), openings are formed at two ends of the waveguide cavity (2), a plurality of protruding structures (3) for radio frequency choke are arranged on two end faces of the waveguide body (1) along the circumference of the openings, and the protruding structures (3) extend along the axial direction of the waveguide; flanges (4) are formed at two ends of the waveguide body (1), mounting holes (5) and positioning holes (6) are formed in the flanges (4), grooves are formed in the waveguide body on the outer side of the opening, the protruding structures (3) are located in the grooves, and the end faces of the outer sides of the protruding structures (3) are located on the inner side of the end faces of the waveguide body or flush with the end faces of the waveguide body; the outer end face of the flange plate (4) is arranged in the outer end face of the waveguide body (1); mounting hole (5) and locating hole (6) interval on ring flange (4) set up, and every install locating pin (7) in the locating hole of ring flange (4), locating pin (7) are used for the location when waveguide is connected with other parts.

2. A waveguide with radio frequency choke according to claim 1 wherein: every be formed with four mounting hole (5) and four locating hole (6) on flange dish (4), just mounting hole (5) and locating hole (6) equidistant setting, be formed with in two locating hole (6) of every flange dish (4) and fix a position pin (7), the line between two fix a position pin (7) on one of them flange dish (4) is the cross with the line between two fix a position pin (7) on another flange dish (4).

3. A waveguide with radio frequency choke according to claim 1 wherein: the protruding structures (3) are cylindrical, and the protruding structures (3) are regularly arranged.

4. A waveguide with radio frequency choke according to claim 1 wherein: the protruding structures (3) are cuboid, and the protruding structures (3) are regularly arranged.

5. A waveguide with radio frequency choke according to claim 1 wherein: the protruding structures (3) are fan-shaped, and the protruding structures (3) are regularly arranged.

6. A waveguide with radio frequency choke according to claim 1 wherein: the waveguide cavity (2) is a cuboid cavity.

7. A waveguide with radio frequency choke according to claim 1 wherein: the flange plate (4) is round or square.