CN219180751U

CN219180751U - Miniaturized multichannel waveguide coaxial converter

Info

Publication number: CN219180751U
Application number: CN202320138631.4U
Authority: CN
Inventors: 郭朝阳; 孙博雅
Original assignee: Shaanxi Huada Science Technology Co Ltd
Current assignee: Shaanxi Huada Science Technology Co Ltd
Priority date: 2023-01-28
Filing date: 2023-01-28
Publication date: 2023-06-13
Anticipated expiration: 2033-01-28

Abstract

The utility model discloses a miniaturized multichannel waveguide coaxial converter, which belongs to the application field of radio frequency microwave technology, and comprises a radio frequency coaxial connector, an end cover, waveguide cavities and a base, wherein one ends of the waveguide cavities connected with the end cover are bent, bending directions between adjacent waveguide cavities are different so as to realize staggered arrangement between the adjacent radio frequency coaxial connectors, a jack for connecting pins is arranged in the center of the end face of the bent part of the waveguide cavity, and a stepped impedance converter connected with the jack is arranged in the waveguide cavity. Compared with the prior structure, the structure adopts the waveguide cavity bending scheme to solve the interference problem of the coaxial end in the installation process, realizes the impedance matching problem of the waveguide cavity to the coaxial conversion by adjusting the size of the stepped impedance converter in the converter, can arrange a plurality of groups of waveguide coaxial converters on a small base, greatly saves the installation space, and has the characteristics of miniaturization.

Description

Miniaturized multichannel waveguide coaxial converter

Technical Field

The utility model belongs to the application field of radio frequency microwave technology, and particularly relates to a miniaturized multichannel waveguide coaxial converter.

Background

The waveguide coaxial converter is a passive conversion device widely used in modern microwave millimeter wave systems, plays an indispensable role in various radar systems, precision guidance systems and testing fields, is commonly used for signal interconnection between a transceiver module and an array antenna in an active phased array antenna system, and generally achieves the function of converting rectangular waveguide into coaxial line.

At present, the existing coaxial waveguide converter adopts a terminating mode or an orthogonal mode, adjacent waveguide cavities in the structure are consistent in structure, adjacent radio frequency coaxial connectors are consistent in position and size, in order to avoid installation interference, space allowance must be reserved between the adjacent radio frequency coaxial connectors, the installation size is often larger than the actual installation requirement, the installation requirement of a small space cannot be met, and the technical problem is how to further reduce the size of the multichannel waveguide coaxial converter.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a miniaturized multichannel waveguide coaxial converter, which adopts a waveguide cavity bending scheme to solve the interference problem of a coaxial end in the installation process, realizes the impedance matching problem of the coaxial conversion from a waveguide cavity to the waveguide cavity by adjusting the size of a stepped impedance converter in the converter, can arrange a plurality of groups of waveguide coaxial converters on a small base, greatly saves the installation space and has the characteristics of miniaturization.

The utility model solves the problems by the following technical means:

the utility model provides a miniaturized multichannel waveguide coaxial converter, its characterized in that includes radio frequency coaxial connector, end cover, waveguide chamber and base, the top at the end cover is installed to the radio frequency coaxial connector, the top at the waveguide chamber is installed to the end cover, and the bottom in waveguide chamber is installed the base, wherein: the radio frequency coaxial connector comprises an outer shell, a bushing, an insulator and a contact pin, wherein a through hole is formed in the center of the outer shell, the bushing is fixed on a step at the tail end of the through hole, the insulator is arranged on a ring groove at the root of the bushing, and the contact pin is coaxially sleeved in a middle hole of the insulator; one end of the waveguide cavity connected with the end cover is bent, the bending angle ranges from 10 degrees to 20 degrees, and the bending directions of adjacent waveguide cavities are different so as to realize staggered arrangement between adjacent radio frequency coaxial connectors; the end face center of the bending part of the waveguide cavity is provided with a jack for connecting the contact pin, the inside of the waveguide cavity is provided with a stepped impedance converter connected with the jack, and the two ends of the waveguide cavity are provided with countersunk connecting holes for connecting the end cover and the base.

Preferably, one end of the contact pin, which is close to the jack, is provided with a split groove expansion hole type plug, the other end of the contact pin is provided with a grooved connecting hole, and the contact pin is coaxially sleeved in the middle hole of the insulator through the positioning table.

Preferably, a connecting disc is arranged at the bottom of the outer shell, a cross groove pan head screw is arranged in a round hole of the connecting disc, and the cross groove pan head screw is used for connecting the radio frequency coaxial connector and the end cover.

Preferably, the end cover is provided with the centre bore, and the top of centre bore is provided with location step hole, and location step hole is used for connecting, locating bush, and the upper surface of end cover is provided with the installation step, and the upside of installation step has been seted up and has been connected the last connecting hole that cross groove pan head screw was used, and the downside of installation step has been seted up down the connecting hole, is provided with a word groove pan head screw in the connecting hole down, and a word groove pan head screw is used for connecting end cover and waveguide chamber.

Preferably, the connection part of the waveguide cavity and the end cover, the connection part of the waveguide cavity and the base and the connection part between the adjacent waveguide cavities are provided with press-fit grooves.

Preferably, the base comprises a connecting cavity, an inner connecting seat and an outer connecting seat at two ends of the connecting cavity, the cross section of the base is of an I-shaped structure, an inner hexagon screw is arranged in a round hole of the inner connecting seat, and the inner hexagon screw is used for connecting the base and the waveguide cavity.

The miniaturized multichannel waveguide coaxial converter can effectively solve the technical problems of the traditional coaxial waveguide converter, and has the following beneficial effects:

the converter comprises a radio frequency coaxial connector, an end cover, a waveguide cavity and a base, wherein one end of the waveguide cavity is connected with the end cover, the bending directions of adjacent waveguide cavities are different, so that staggered arrangement between the adjacent radio frequency coaxial connectors is realized, the center of the end face of the bent part of the waveguide cavity is provided with a jack for connecting a contact pin, and the inside of the waveguide cavity is provided with a stepped impedance converter connected with the jack. Compared with the prior structure, the structure adopts the waveguide cavity bending scheme to solve the interference problem of the coaxial end in the installation process, realizes the impedance matching problem of the waveguide cavity to the coaxial conversion by adjusting the size of the stepped impedance converter in the converter, can arrange a plurality of groups of waveguide coaxial converters on a small base, greatly saves the installation space, and has the characteristics of miniaturization.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of the present utility model;

fig. 2 is a schematic view of adjacent rf coaxial connector locations of the present utility model;

fig. 3 is a schematic diagram of the radio frequency coaxial connector arrangement of the present utility model;

FIG. 4 is a schematic view of the internal structure of the present utility model;

FIG. 5 is a schematic installation view of the present utility model;

fig. 6 is a schematic interior view of a radio frequency coaxial connector of the present utility model;

FIG. 7 is a schematic diagram of a press-fit groove structure of the present utility model;

fig. 8 is a schematic diagram of a stepped impedance transformer of the present utility model.

The coaxial connector comprises a 1-radio frequency coaxial connector, a 101-outer shell, a 102-bushing, a 103-insulator, a 104-contact pin, a 105-through hole, a 106-split slot expansion hole type plug, a 107-slotted connecting hole, a 108-positioning table, a 109-connecting disc, a 110-cross slot pan head screw, a 2-end cover, a 201-central hole, a 202-positioning step hole, a 203-mounting step, a 204-upper connecting hole, a 205-lower connecting hole, a 206-straight slot pan head screw, a 3-waveguide cavity, a 301-jack, a 302-stepped impedance converter, a 303-countersunk connecting hole, a 304-press fit slot, a 305-positioning hole, a 4-base, a 401-connecting cavity, a 402-inner connecting seat, a 403-outer connecting seat and a 404-inner hexagon screw.

Detailed Description

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

The present utility model will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 8, the miniaturized multichannel waveguide coaxial converter comprises a radio frequency coaxial connector 1, an end cover 2, a waveguide cavity 3 and a base 4, wherein the radio frequency coaxial connector 1 is installed at the top of the end cover 2 through a screw, the end cover 2 is installed at the top of the waveguide cavity 3 through a screw, the base 4 is installed at the bottom of the waveguide cavity 3 through a screw, one end of the waveguide cavity 3 connected with the end cover 2 is bent, the bending angle alpha ranges from 10 degrees to 20 degrees, the bending directions between adjacent waveguide cavities 3 are different, so that staggered arrangement between adjacent radio frequency coaxial connectors 1 is realized, the numerical value of the bending angle alpha is 15 degrees, the interference problem of the coaxial ends in the installation process is solved through a bending scheme, and more radio frequency coaxial connectors 1 can be arranged on the base 4 with the same size.

In the figure, the radio frequency coaxial connector 1 comprises an outer shell 101, a bushing 102, an insulator 103 and a contact pin 104, wherein a through hole 105 is formed in the center of the outer shell 101, the bushing 102 is fixed on a step at the tail end of the through hole 105, the insulator 103 is installed on a ring groove at the root of the bushing 102, the contact pin 104 is coaxially sleeved in a middle hole of the insulator 103, a split groove expansion hole type plug 106 is arranged at one end, close to the jack 301, of the contact pin 104, a groove connecting hole 107 is formed at the other end of the contact pin 104, and the contact pin 104 is coaxially sleeved in the middle hole of the insulator 103 through a positioning table 108. In addition, a connecting disc 109 is arranged at the bottom of the outer shell 101, a cross-slot pan head screw 110 is arranged in a round hole of the connecting disc 109, and the cross-slot pan head screw 110 is used for connecting the radio frequency coaxial connector 1 and the end cover 2.

It should be noted that, because the rf coaxial connector 1 needs to be connected with the waveguide cavity 3, the reliability of the connection form between the rf coaxial connector 1 and the waveguide cavity directly affects whether the performance of the rf coaxial connector can meet the use condition of the user, so that under the conventional structural form, the tail part of the pin adopts the form of punching a split slot, and the left end of the pin is punched

A bottom hole with a depth of 1.5, a groove with a groove depth of 1.2 and a groove depth of 4×0.1 was split under the bottom hole, then a hole expansion was performed, and finally +.>

The standard well test of (2) has a separation force of not less than 0.4N, followed by +.>

The standard hole inspection insertion force of the pin is not more than 1N, and finally the heat treatment HV320-360 is carried out, so that the elastic stress exists at the connection part of the pin and the waveguide cavity, and the reliable connection of the waveguide cavity and the connector can be ensured. Furthermore, in order to maintain a good coaxial centering manner between the 2.92 radio frequency coaxial connector and the waveguide cavity, the 2.92 radio frequency coaxial connector end of the radio frequency coaxial connector extends out of the waveguide cavity end of the radio frequency coaxial connector by a certain length, and the waveguide cavity end of the radio frequency coaxial connector is sunk by a certain length, so that a nested structure is formed to ensure the coaxial alignment of the radio frequency coaxial connector.

In the figure, a jack 301 for connecting the pin 104 is provided at the center of the end face of the bent portion of the waveguide cavity 3, a stepped impedance transformer 302 connected to the jack 301 is provided inside the waveguide cavity 3, and countersunk connection holes 303 for connecting the end cap 2 and the base 4 are provided at both ends of the waveguide cavity 3. The waveguide coaxial converter assembly realizes energy transmission of the waveguide port and the coaxial port through the stepped impedance converter, the product structure is produced in an assembly mode, the product structure adopts a structure mode that a waveguide cavity is bent for 15 degrees, the structure mode avoids the problem of installation interference of the coaxial port, an 8-port waveguide interface is integrated on a base, the space installation size is greatly reduced, and the purpose of miniaturization of the product is achieved. In practical application, the matching of the waveguide and the coaxial line is realized by adopting a 1/4 wavelength stepped impedance converter.

In the figure, the end cover 2 is provided with a center hole 201, the top of the center hole 201 is provided with a positioning step hole 202, the positioning step hole 202 is used for connecting and positioning the bushing 102, the upper surface of the end cover 2 is provided with an installation step 203, the upper side of the installation step 203 is provided with an upper connecting hole 204 for connecting the cross slot pan head screw 110, the lower side of the installation step 203 is provided with a lower connecting hole 205, a straight slot pan head screw 206 is arranged in the lower connecting hole 205, and the straight slot pan head screw 206 is used for connecting the end cover 2 and the waveguide cavity 3. In this embodiment, the connection between the waveguide cavity 3 and the end cover 2, the connection between the waveguide cavity 3 and the base 4, and the connection between the adjacent waveguide cavities 3 are all provided with the press-fit grooves 304, and in practical application, in order to increase the positioning accuracy, the positioning pins and the positioning holes 306 are also provided to ensure the accuracy of connection positioning, so that the assembly is convenient.

It should be noted that, be connected between subassembly upper end cover and the waveguide chamber, the lower extreme cover is connected with the waveguide chamber, the waveguide chamber subassembly is connected with the base all adopts the connected mode of screw, in order to reduce the quantity of part, adopt the form of pressure to join in marriage the groove and carry out locking design in locking structural design, all adopt the pressure to join in marriage the groove that the depth is about 0.2mm deep in waveguide chamber and upper and lower end cover junction, waveguide chamber and base junction, its structure can effectively increase the joint strength between each part, the use of part has been reduced under the circumstances of guaranteeing its joint strength.

In the figure, the base 4 comprises a connecting cavity 401, an inner connecting seat 402 and an outer connecting seat 403 at two ends of the connecting cavity 401, the cross section of the base 4 is of an I-shaped structure, an inner hexagon screw 404 is arranged in a round hole of the inner connecting seat 402, and the inner hexagon screw 404 is used for connecting the base 4 and the waveguide cavity 3.

In practical application, in order to realize the mutual conversion of the transmission line between the waveguide and the coaxial line, the waveguide coaxial converter can realize the mutual conversion of TE10 mode waves and TEM mode waves in the system, and has small standing waves and low loss; the novel termination structure is adopted, wherein the waveguide coaxial converter comprises a 2.92 radio frequency coaxial connector, a base, a waveguide cavity and an end cover, and the scheme realizes the matching of the waveguide and the coaxial line by adopting a 1/4 wavelength stepped impedance converter. In the figure, the waveguide converter component is characterized in that 8 waveguide coaxial converters are integrated on a base of 45.5 multiplied by 25 multiplied by 45 by using screws, and the structure of the waveguide converter component reduces the installation space and achieves the miniaturization. The waveguide cavity of the waveguide coaxial converter adopts a non-standard waveguide port, the size of the waveguide port is 5.5 multiplied by 2.5, and the waveguide port is designed according to the frequency band required by a user and is directly connected to the base.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The utility model provides a miniaturized multichannel waveguide coaxial converter, its characterized in that includes radio frequency coaxial connector (1), end cover (2), waveguide chamber (3) and base (4), the top at end cover (2) is installed in radio frequency coaxial connector (1), the top at waveguide chamber (3) is installed in end cover (2), and install in the bottom of waveguide chamber (3) base (4), wherein:

the radio frequency coaxial connector (1) comprises an outer shell (101), a bushing (102), an insulator (103) and a contact pin (104), wherein a through hole (105) is formed in the center of the outer shell (101), the bushing (102) is fixed on a step at the tail end of the through hole (105), the insulator (103) is installed on a ring groove at the root of the bushing (102), and the contact pin (104) is coaxially sleeved in a middle hole of the insulator (103);

the waveguide cavities (3) are bent at one end connected with the end cover (2), the bending angle (alpha) ranges from 10 degrees to 20 degrees, and the bending directions of the adjacent waveguide cavities (3) are different so as to realize staggered arrangement between the adjacent radio frequency coaxial connectors (1);

the end face center of the bending part of the waveguide cavity (3) is provided with a jack (301) for connecting the contact pin (104), the inside of the waveguide cavity (3) is provided with a step impedance transformer (302) connected with the jack (301), and both ends of the waveguide cavity (3) are provided with countersunk connecting holes (303) for connecting the end cover (2) and the base (4).

2. The miniaturized multichannel waveguide coaxial converter according to claim 1, wherein one end of the pin (104) close to the jack (301) is provided with a split groove expansion hole type plug (106), the other end of the pin (104) is provided with a groove connecting hole (107), and the pin (104) is coaxially sleeved in the middle hole of the insulator (103) through the positioning table (108).

3. The miniaturized multichannel waveguide coaxial converter according to claim 1, characterized in that a connecting disc (109) is arranged at the bottom of the outer shell (101), a cross-slot pan head screw (110) is arranged in a round hole of the connecting disc (109), and the cross-slot pan head screw (110) is used for connecting the radio frequency coaxial connector (1) and the end cover (2).

4. The miniaturized multichannel waveguide coaxial converter according to claim 1, wherein the end cover (2) is provided with a central hole (201), the top of the central hole (201) is provided with a positioning step hole (202), the positioning step hole (202) is used for connecting and positioning the bushing (102), the upper surface of the end cover (2) is provided with a mounting step (203), the upper side of the mounting step (203) is provided with an upper connecting hole (204) for connecting the cross slot pan head screw (110), the lower side of the mounting step (203) is provided with a lower connecting hole (205), a slotted pan head screw (206) is arranged in the lower connecting hole (205), and the slotted pan head screw (206) is used for connecting the end cover (2) and the waveguide cavity (3).

5. The miniaturized multichannel waveguide coaxial converter according to claim 1, characterized in that press-fit grooves (304) are provided at the junction of the waveguide cavity (3) and the end cover (2), at the junction of the waveguide cavity (3) and the base (4), and at the junction between adjacent waveguide cavities (3).

6. The miniaturized multichannel waveguide coaxial converter according to claim 1, wherein the base (4) is composed of a connecting cavity (401), an inner connecting seat (402) and an outer connecting seat (403) at two ends of the connecting cavity (401), the cross section of the base (4) is of an I-shaped structure, an inner hexagon screw (404) is arranged in a round hole of the inner connecting seat (402), and the inner hexagon screw (404) is used for connecting the base (4) and the waveguide cavity (3).