CN217740761U - Waveguide coaxial converter - Google Patents
Waveguide coaxial converter Download PDFInfo
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- CN217740761U CN217740761U CN202221656610.3U CN202221656610U CN217740761U CN 217740761 U CN217740761 U CN 217740761U CN 202221656610 U CN202221656610 U CN 202221656610U CN 217740761 U CN217740761 U CN 217740761U
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Abstract
The application discloses coaxial converter of waveguide includes: a lower housing; the cover plate is provided with a first positioning hole and a first mounting hole, the cover plate is arranged at the top end of the lower shell, and the cover plate and the lower shell surround to form a cavity with an opening end; the quarter impedance transformer is provided with a second positioning hole and is arranged in the cavity; the coaxial connector comprises a connector main body, a micro-strip positioning portion and an elastic micro-strip, wherein the micro-strip positioning portion penetrates through the first positioning hole and extends into the second positioning hole, the elastic micro-strip is arranged at the end portion of the micro-strip positioning portion and tightly attached to the inner wall of the second positioning hole, and the connector main body is installed on the cover plate through the first installation hole. The waveguide coaxial converter is easy to process, uses the elastic connection structure, effectively solves the problem of tight fit between the cavity and the coaxial connector, and improves the consistency of assembly and debugging.
Description
Technical Field
The application relates to the technical field of waveguide coaxial converters, in particular to a waveguide coaxial converter.
Background
In various radar systems and signal transmission in the precise radio frequency microwave field, except that a transmission line is not needed for wireless signal transmission, most scenes still need a transmission line for signal transmission, wherein coaxial lines and waveguide tubes are widely used for transmitting microwave radio frequency energy. The most widely used waveguide in the market is a rectangular waveguide, the most commonly used coaxial line for communication is a 50 Ω coaxial cable assembly, and the two transmission lines have great differences in size, material and transmission characteristics. However, due to the wide range of applications, it is often desirable to interconnect two transmission lines, which requires a waveguide coaxial transformer. The waveguide coaxial converter is indispensable in various radar systems, precision guidance systems and testing equipment.
The existing common waveguide coaxial converters all adopt a quarter impedance transformer with a waveguide narrow edge height designed into a multi-step form or a coaxial connector microstrip positioning part as a probe form, and are suspended into a waveguide cavity from a waveguide wide edge. The two forms of waveguide coaxial switching, the first: the processing difficulty is higher, the precision is difficult to guarantee, and particularly, various indexes of high frequency or very high frequency are difficult to guarantee. And the second method comprises the following steps: high-performance products are obtained, the debugging requirement is high, and the operation is difficult, particularly in a high-frequency band.
In this background section, the above information disclosed is only for enhancement of understanding of the background of the application and therefore it may contain prior art information that does not constitute a part of the common general knowledge of a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present application is directed to a waveguide coaxial converter
The application provides a waveguide coaxial converter, waveguide coaxial converter includes: a lower housing; the cover plate is provided with a first positioning hole and a first mounting hole, the cover plate is arranged at the top end of the lower shell, and the cover plate and the lower shell surround to form a cavity with an opening end; the quarter impedance transformer is provided with a second positioning hole and is arranged in the cavity; the coaxial connector comprises a connector main body, a micro-strip positioning portion and an elastic micro-strip, wherein the micro-strip positioning portion penetrates through the first positioning hole and extends into the second positioning hole, the elastic micro-strip is arranged at the end portion of the micro-strip positioning portion and tightly attached to the inner wall of the second positioning hole, and the connector main body is installed on the cover plate through the first installation hole.
According to some embodiments of the present application, the elastic microstrip and the second positioning hole are in an interference fit.
According to some embodiments of the application, the diameter of the elastic microstrip is larger than the diameter of the microstrip positioning portion.
According to some embodiments of the application, the elastic microstrip is a circular ring-shaped elastic microstrip.
According to some embodiments of the application, the quarter impedance transformer is a stepped quarter impedance transformer, and the second positioning hole is located at a highest stage of the quarter impedance transformer.
According to some embodiments of the present application, the waveguide coaxial converter further comprises: the first flange plate is arranged on one side of the cover plate; and the second flange plate is arranged on one side of the lower shell correspondingly to the first flange plate.
According to some embodiments of the present application, a plurality of first flange positioning pins are mounted on a side wall of the first flange; and/or a plurality of second flange positioning pins are arranged on the side wall of the second flange plate.
According to some embodiments of the present application, the cover plate and the lower housing are threadedly coupled by a first fixing bolt.
According to some embodiments of the application, the cover plate and the coaxial connector are threadedly connected by a second fixing bolt.
According to some embodiments of the application, the quarter impedance transformer is integrally milled inside the cavity using a numerically controlled milling machine.
This application has the coaxial connector of elasticity microstrip through the adoption, the effectual tight fit problem of having solved between coaxial connector and the cavity, and cavity structure does not produce obvious change in size simultaneously, does not increase the processing degree of difficulty of the coaxial converter of waveguide yet.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 shows a schematic structural diagram of a waveguide coaxial converter according to an exemplary embodiment of the present application.
Fig. 2 shows a top view of a waveguide coaxial converter according to an example embodiment of the present application.
Fig. 3 illustrates a schematic structural diagram of a waveguide coaxial converter according to some embodiments of the present application.
Figure 4 illustrates an assembly structure diagram of an elastic microstrip according to some embodiments of the present application.
Fig. 5 illustrates a schematic diagram of a coaxial connector according to some embodiments of the present application.
Fig. 6 shows a flow chart of a method of assembling a waveguide coaxial converter according to an example embodiment of the present application.
Fig. 7 shows a performance simulation diagram of a waveguide coaxial converter according to an example embodiment of the present application.
Fig. 8 shows a performance measurement diagram of a waveguide coaxial converter according to an exemplary embodiment of the present application.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments 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, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and a repetitive description thereof will be omitted.
The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other means, components, materials, devices, etc. In such cases, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The existing common waveguide coaxial converters all adopt a quarter impedance transformer with a waveguide narrow edge height designed into a multi-step form or a coaxial connector microstrip positioning part as a probe form, and are suspended into a waveguide cavity from a waveguide wide edge. The two forms of waveguide coaxial switching, the first: the processing difficulty is higher, the precision is difficult to guarantee, and especially, various indexes of high frequency or very high frequency are difficult to guarantee. And the second method comprises the following steps: the high-performance product has high debugging requirement and is difficult to operate, especially in a high-frequency band.
Specifically, in the existing common waveguide coaxial converters, the cover plate and the coaxial connector of part of the waveguide coaxial converter, the matching column and the waveguide, and the cover plate and the waveguide are all welded by soldering, and because the welding difficulty of each part and the connector is high, the precision of the waveguide coaxial converter formed by the method is difficult to guarantee, and particularly, each index of high frequency or very high frequency is difficult to guarantee. In the existing waveguide coaxial converter adopting a non-welding connection mode, due to the limitation of the connection mode between the microstrip positioning part and the quarter-wave impedance converter, a high-performance product is obtained, the debugging requirement is high, the operation is difficult, the production efficiency is low, and the consistency is poor. The preferred embodiments of the present application will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein only to illustrate and explain the present application and not to limit the present application.
Fig. 1 shows a schematic structural diagram of a waveguide coaxial converter according to an exemplary embodiment of the present application. Fig. 2 shows a top view of a waveguide coaxial converter according to an example embodiment of the present application.
Referring to fig. 1 and 2, the waveguide coaxial converter 100 of the exemplary embodiment includes a lower case 110, a cover plate 120, a quarter-impedance transformer 130, and a coaxial connector 140.
As shown in fig. 1 and 2, the cover plate 120 has a first positioning hole 121 and a first mounting hole 122, the cover plate 120 is disposed at the top end of the lower housing 110, and the cover plate 120 and the lower housing 110 surround to form a cavity 160 having an open end 150.
The quarter impedance transformer 130 has a second positioning hole 131, and the quarter impedance transformer 130 is disposed in the cavity 160.
The coaxial connector 140 includes a connector main body 141, a microstrip positioning portion 142, and an elastic microstrip 143, the microstrip positioning portion 142 passing through the first positioning hole 121 and protruding into the second positioning hole 131. The elastic micro strip 143 is disposed at an end of the micro strip positioning portion 142, the elastic micro strip 143 is closely attached to an inner wall of the second positioning hole 131, and the connector body 141 is mounted on the cover plate 120 through the first mounting hole 122.
According to the embodiment of the present application, the diameter of the elastic microstrip 143 is larger than the diameter of the microstrip positioning portion 142, so that the radial displacement limitation of the microstrip positioning portion 142 in the second positioning hole is realized by the close fit between the elastic microstrip 143 and the second positioning hole 131.
The elastic micro-strip 143 is a circular elastic micro-strip, sleeved on the end of the micro-strip positioning portion 142, and tightly attached along the circumference of the second positioning hole 131.
Fig. 3 illustrates a schematic structural diagram of a waveguide coaxial converter according to some embodiments of the present application.
Referring to fig. 1-5, a waveguide coaxial converter 100 of some embodiments includes a lower housing 110, a cover plate 120, a quarter-impedance transformer 130, and a coaxial connector 140.
As shown in fig. 1 to 5, the cover plate 120 has a first positioning hole 121 and a first mounting hole 122, the cover plate 120 is disposed at the top end of the lower housing 110, and the cover plate 120 and the lower housing 110 surround to form a cavity 160 having an open end 150.
The quarter impedance transformer 130 has a second positioning hole 131, and the quarter impedance transformer 130 is disposed in the cavity 160.
The coaxial connector 140 includes a connector main body 141, a microstrip positioning portion 142, and an elastic microstrip 143. The microstrip positioning portion 142 passes through the first positioning hole 121 and extends into the second positioning hole 131. The elastic micro strip 143 is disposed at an end of the micro strip positioning portion 142, the elastic micro strip 143 is closely attached to an inner wall of the second positioning hole 131, and the connector body 141 is mounted on the cover plate 120 through the first mounting hole 122.
The quarter impedance transformer 130 is a stepped quarter impedance transformer having at least two steps, the second positioning hole 131 is located at the highest step section of the quarter impedance transformer 130, and the number of steps of the quarter impedance transformer 130 can be flexibly adjusted according to performance requirements, which is not specifically limited herein.
According to the embodiment of the present application, the fitting relationship between the elastic micro strip 143 and the second positioning hole 131 is an interference fit, as shown in fig. 3, the original diameter D of the elastic micro strip 143 is larger than the aperture D of the second positioning hole 131. In the process of assembling the elastic micro-strip 143 with the second positioning hole 131, the elastic micro-strip 143 is controlled to generate a part of elastic deformation, so that the elastic micro-strip 143 can enter the second positioning hole 131, and after the elastic micro-strip 143 reaches a predetermined mounting point, the elastic micro-strip 143 is tightly attached to the inner wall of the second positioning hole 131 by the resilience of the elastic micro-strip 143, thereby positioning the micro-strip positioning portion 142 in the second positioning hole 131.
According to some embodiments of the present application, the waveguide coaxial converter 100 further comprises a first flange 170 and a second flange 180, the first flange 170 being disposed on one side of the cover plate 120. The second flange 180 is disposed at one side of the lower housing 110 corresponding to the first flange 170, and after the waveguide coaxial converter 100 is assembled and molded, the first flange 170 and the second flange 180 together form a complete circular disk. Further, a plurality of first flange positioning pins 171 are mounted on a side wall of the first flange plate 170, and a plurality of second flange positioning pins 181 are also mounted on a side wall of the second flange plate 180.
During the machining process, the flatness and the surface finish of the first flange plate and the second flange plate are kept consistent so as to keep the performance consistency. The flatness of the first flange and the second flange is 0-0.04, optionally 0.02. The surface finish of the first flange and the second flange is 1-2, optionally 1.6.
According to some embodiments of the present application, a plurality of first fixing bolts 123 are disposed on the cap plate 120, and the plurality of first fixing bolts 123 are connected between the cap plate 120 and the lower housing 110, so that the cap plate 120 and the lower housing 110 are fixed.
The coaxial connector 140 is generally T-shaped, and the connector body 141 includes a lower mounting flange 1411 and an upper threaded section 1412. A plurality of second fixing bolts 144 are screwed to the mounting flange 1411 of the connector main body 141, correspondingly, a plurality of first mounting holes 122 are formed in the cover plate 120, the first mounting holes 122 are threaded holes, and the coaxial connector 140 is integrally fixed to the cover plate 120 through the threaded matching of the plurality of second fixing bolts 144 and the plurality of first mounting holes 122.
Fig. 6 shows a flow chart of a method of assembling a waveguide coaxial converter according to an example embodiment of the present application.
In the process of manufacturing the waveguide coaxial transformer 100 of the present application, first, in step S1, the devices are sequentially processed and mounted, and the devices are surface-treated by gold plating during the manufacturing process, and the quarter impedance transformer 130 is designed in a step shape in a design form other than a full waveguide width side. The design of the quarter impedance transformer 130 with the non-full waveguide wide edge ensures the processing precision, is beneficial to assembly and debugging, has excellent performance and low processing and assembly difficulty, and is suitable for high-frequency broadband orthogonal waveguide coaxial converters such as BJ400 models to BJ900 models.
The quarter impedance transformer 130 may be integrally milled inside the cavity 160 by using a numerically controlled milling machine, so as to ensure the assembly accuracy.
Then, in step S2, the finished device is assembled by first placing the cover plate 120 on the lower case 110 and coupling the plurality of first fixing bolts 123 between the cover plate 120 and the lower case 110 such that the cover plate 120 and the lower case 110 are completely fixed.
Subsequently, in step S3, the elastic micro strip 143 is controlled to partially elastically deform, so that the elastic micro strip 143 can enter the second positioning hole 131, and after the elastic micro strip 143 reaches a predetermined mounting point, the elastic micro strip 143 is tightly attached to the inner wall of the second positioning hole 131 by the resilience force of the elastic micro strip 143, thereby positioning the micro strip positioning portion 142 in the second positioning hole 131.
In step S4, the coaxial connector 140 is fixed to the cover plate 120 by the screw-fitting of the plurality of second fixing bolts 144 and the plurality of first mounting holes 122, thereby completing the integral assembly of the waveguide coaxial converter 100.
The waveguide coaxial converter 100 of the present application has simple and convenient assembly process operation and high installation efficiency, and can ensure the precision of the device, and the coaxial connector 140 is located in the center of the broadside of the highest stage of the quarter-impedance transformer 130 in the cavity 160, is away from the waveguide closed section by a quarter wavelength, and applies the quarter-impedance change principle. The non-full waveguide wide-side quarter impedance transformer 130 is integrated with the cavity 160 to achieve proper operation of the device.
The waveguide coaxial converter 100 according to the embodiment of the present application is suitable for a high-frequency broadband orthogonal waveguide coaxial converter, such as a BJ400 model to a BJ900 model, and when the high-frequency broadband orthogonal waveguide coaxial converter is manufactured, the waveguide coaxial converter 100 with different manufacturing parameters may be selected according to different model requirements, as follows: when the BJ400 standard waveguide is manufactured, the operating frequency range of the BJ400 is 32.9GHz-50.1GHz, and the corresponding standard-caliber rectangular waveguide and the waveguide coaxial converter 100 of the coaxial connector 140 can be selected according to the required operating frequency range.
Specifically, when the operating frequency range of the high-frequency broadband orthogonal waveguide coaxial converter is 32.9GHz-50.1GHz, the waveguide coaxial converter 100 of the BJ400 standard waveguide and the 1.85mm standard coaxial connector 140 is selected. Referring to fig. 7 and 8 of the drawings in the specification, it can be seen that the waveguide coaxial converter 100 of the present application has a standing-wave ratio smaller than 1.06 (-30.098 dB) in a full waveguide standby wide range, and has very good performance.
Similarly, when the BJ900 standard waveguide is manufactured, the working frequency range of the orthogonal waveguide coaxial converter with the high frequency broadband is 73.8GHz-112GHz. The waveguide coaxial converter 100 of the coaxial connector 140 and the corresponding standard-diameter rectangular waveguide can be selected according to the required operating frequency range.
Specifically, the waveguide coaxial converter 100 of the BJ900 standard waveguide and the 1.0mm standard coaxial connector 140 is selected when the frequency range is 73.8GHz-112GHz.
When the waveguide coaxial converter is installed to the high-frequency broadband orthogonal waveguide coaxial converter, compared with the traditional waveguide coaxial converter, the waveguide coaxial converter has better performance. Moreover, the waveguide coaxial converter is convenient to install, and the precision is more accurate during manufacturing.
Finally, it should be noted that: although the present disclosure has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the disclosure. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. A waveguide coaxial transducer, comprising:
a lower housing;
the cover plate is provided with a first positioning hole and a first mounting hole, the cover plate is arranged at the top end of the lower shell, and the cover plate and the lower shell surround to form a cavity with an opening end;
the quarter impedance transformer is provided with a second positioning hole and is arranged in the cavity;
the coaxial connector comprises a connector main body, a micro-strip positioning portion and an elastic micro-strip, wherein the micro-strip positioning portion penetrates through the first positioning hole and extends into the second positioning hole, the elastic micro-strip is arranged at the end portion of the micro-strip positioning portion and tightly attached to the inner wall of the second positioning hole, and the connector main body is installed on the cover plate through the first installation hole.
2. The waveguide coaxial converter of claim 1, wherein the elastic microstrip and the second positioning hole are in interference fit.
3. The waveguide coaxial converter of claim 1, wherein the diameter of the elastic microstrip is larger than the diameter of the microstrip locating portion.
4. The waveguide coaxial converter of claim 1, wherein the elastic microstrip is an annular elastic microstrip.
5. The waveguide coaxial transformer of claim 1, wherein the quarter-impedance transformer is a stepped quarter-impedance transformer, and the second locating hole is located at a highest-plateau stage of the quarter-impedance transformer.
6. The waveguide coaxial converter of claim 1, further comprising:
the first flange plate is arranged on one side of the cover plate;
and the second flange plate is arranged on one side of the lower shell correspondingly to the first flange plate.
7. The waveguide coaxial converter of claim 6, wherein a plurality of first flange alignment pins are mounted on a sidewall of the first flange; and/or
And a plurality of second flange positioning pins are mounted on the side wall of the second flange plate.
8. The waveguide coaxial converter of claim 1,
the cover plate is in threaded connection with the lower shell through a first fixing bolt.
9. The waveguide coaxial converter of claim 1,
the cover plate and the coaxial connector are in threaded connection through a second fixing bolt.
10. The waveguide coaxial converter of claim 1,
the quarter impedance converter is integrally milled inside the cavity by adopting a numerical control milling machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221656610.3U CN217740761U (en) | 2022-06-28 | 2022-06-28 | Waveguide coaxial converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221656610.3U CN217740761U (en) | 2022-06-28 | 2022-06-28 | Waveguide coaxial converter |
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| Publication Number | Publication Date |
|---|---|
| CN217740761U true CN217740761U (en) | 2022-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202221656610.3U Active CN217740761U (en) | 2022-06-28 | 2022-06-28 | Waveguide coaxial converter |
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| Country | Link |
|---|---|
| CN (1) | CN217740761U (en) |
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2022
- 2022-06-28 CN CN202221656610.3U patent/CN217740761U/en active Active
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