A waveguide device for converting an H-plane ridge waveguide to an air waveguide
By introducing an L-shaped cavity design between the H-plane ridge waveguide and the air waveguide, the impedance matching problem is solved, achieving efficient waveguide conversion and meeting diverse design requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FURUI ZHIXING AUTOMOBILE TECHNOLOGY (SHANGHAI) CO LTD
- Filing Date
- 2025-10-17
- Publication Date
- 2026-07-17
AI Technical Summary
Current technology cannot achieve impedance matching from H-plane ridge waveguide to air waveguide.
An L-shaped cavity design is adopted, which connects the H-plane ridge waveguide and the air waveguide through a conversion waveguide. The front side of the L-shaped cavity is connected to the rear side of the H-plane ridge waveguide, and the left side is connected to the right side of the air waveguide, ensuring impedance matching of electromagnetic waves during the conversion process.
It achieves efficient conversion from H-plane ridge waveguide to air waveguide with a conversion efficiency of up to 90% and a relative bandwidth of 13.6%. Furthermore, it features simple fabrication process, low signal channel interference, and flexible layout.
Smart Images
Figure CN224520167U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waveguide conversion structure technology, specifically a waveguide device for converting an H-plane ridge waveguide into an air waveguide. Background Technology
[0002] A waveguide is a structure used to guide electromagnetic waves (such as radio waves, microwaves, and light waves) along a specific path. An H-plane ridge waveguide is a rectangular waveguide with a ridge protrusion added to the inside of the H-plane (the principal plane of the magnetic field, i.e., the plane containing the wider side). Its characteristics include a low cutoff frequency (allowing the transmission of lower frequency signals within the same size), compact size, and easily adjustable characteristic impedance. However, the ridge structure alters its impedance matching characteristics with standard waveguides. An air waveguide typically refers to a waveguide filled with air (such as a standard rectangular waveguide), whose characteristic impedance and cross-sectional dimensions (wide side a, narrow side b) are standardized parameters (such as the WR series waveguides), and its dominant mode is TE. 10 The mode transforms the H-plane ridge waveguide into an air waveguide. Its core is to achieve low-loss, high-efficiency transmission of electromagnetic waves between the two types of waveguides. The key lies in achieving impedance matching, mode compatibility, and low-reflection transition through structural design, while also meeting the broadband requirements in waveguide antenna design.
[0003] Chinese patent CN221669054U proposes a waveguide conversion structure, including a rectangular waveguide and a ridge waveguide. One end of the rectangular waveguide is connected to one end of the ridge waveguide to form a through cavity. After connection, the electromagnetic wave transmission direction of the rectangular waveguide is perpendicular to the electromagnetic wave transmission direction of the ridge waveguide. The extension direction of the long side of the waveguide opening of the rectangular waveguide is parallel to the electromagnetic wave transmission direction of the ridge waveguide. The rectangular waveguide is located on the side of the ridge waveguide with a flange. The rectangular waveguide is located on the side of the ridge ridge away from the flange. The sidewall of the long side of the waveguide opening of the rectangular waveguide that is closest to the long side of the ridge waveguide is in the same plane as the sidewall of the ridge ridge. The wide side of the waveguide opening of the rectangular waveguide extends from the sidewall of the ridge ridge away from the flange to the outside of the ridge waveguide.
[0004] However, the technical solution of this patent has the following problems: This patent cannot achieve impedance matching for the conversion from H-plane ridge waveguide to air waveguide.
[0005] Therefore, those skilled in the art have provided a waveguide device for converting an H-plane ridge waveguide to an air waveguide to solve the above problems. Utility Model Content
[0006] The purpose of this invention is to provide a waveguide device for converting an H-plane ridge waveguide to an air waveguide, so as to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution: A waveguide device for converting an H-plane ridge waveguide to an air waveguide includes an H-plane ridge waveguide and an air waveguide, and further includes a conversion waveguide, wherein the conversion waveguide has an L-shaped cavity for converting the H-plane ridge waveguide to an air waveguide, the H-plane ridge waveguide is located on the front side of the conversion waveguide, and the air waveguide is located on the left side of the conversion waveguide; Furthermore, the H-plane ridge waveguide is fixedly installed on the front side of the conversion waveguide; Furthermore, the air waveguide is fixedly installed on the left side of the conversion waveguide; Furthermore, the rear side of the H-plane ridge waveguide is connected to the front side of the L-shaped cavity; Furthermore, the right side of the air waveguide is connected to the left side of the L-shaped cavity; Furthermore, the closest distance between the rear wall of the L-shaped cavity and the H-plane ridge waveguide is λg / 2, where λg represents the waveguide wavelength, i.e., the wavelength of the electromagnetic wave propagating inside the waveguide. Furthermore, the distance from the right side wall of the L-shaped cavity to the center of the H-plane ridge waveguide is λg / 4.
[0008] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model forms a through cavity by connecting the front side of the L-shaped cavity with the rear side of the H-plane ridge waveguide, and the left side of the L-shaped cavity is connected with the right side of the air waveguide to form a through cavity. Electromagnetic waves enter the L-shaped cavity of the conversion waveguide through the H-plane ridge waveguide. After conversion by the L-shaped cavity, impedance matching is achieved for the conversion from the H-plane ridge waveguide to the air waveguide. This waveguide conversion structure is not only simple to process, but also has less mutual interference between signal channels when it is arranged in the chip, and the circuit layout is simpler and more flexible, which can meet more diverse design needs. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view of the present utility model; Figure 3 For along Figure 2 A three-dimensional view of AA with a portion removed; Figure 4 This is a diagram showing the air filling inside the H-plane ridge waveguide, air waveguide, and conversion waveguide of this utility model; Figure 5 This is the S-parameter table for this utility model.
[0010] In the figure: 1. H-plane ridge waveguide; 2. Air waveguide; 3. Conversion waveguide; 4. L-shaped cavity; 41. Rear wall of L-shaped cavity; 42. Right side wall of L-shaped cavity. Detailed Implementation
[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0012] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.
[0013] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-5 A waveguide device for converting an H-plane ridge waveguide to an air waveguide includes an H-plane ridge waveguide 1 and an air waveguide 2, and further includes a conversion waveguide 3. The conversion waveguide 3 has an L-shaped cavity 4 that converts the H-plane ridge waveguide 1 into an air waveguide 2. The H-plane ridge waveguide 1 is located in front of the conversion waveguide 3, and the air waveguide 2 is located to the left of the conversion waveguide 3.
[0014] The H-plane ridge waveguide 1 is fixedly installed on the front side of the conversion waveguide 3.
[0015] The air waveguide 2 is fixedly installed on the left side of the conversion waveguide 3.
[0016] The rear side of the H-plane ridge waveguide 1 is connected to the front side of the L-shaped cavity 4.
[0017] The right side of the air waveguide 2 is connected to the left side of the L-shaped cavity 4.
[0018] The distance between the rear sidewall 41 of the L-shaped cavity and the H-plane ridge waveguide 1 is λg / 2, where λg represents the waveguide wavelength, i.e. the wavelength of the electromagnetic wave propagating inside the waveguide.
[0019] The distance from the right side wall 42 of the L-shaped cavity to the center of the H-plane ridge waveguide 1 is λg / 4.
[0020] Electromagnetic waves enter the L-shaped cavity 4 of the conversion waveguide 3 through the H-plane ridge waveguide 1. After conversion by the L-shaped cavity 4, impedance matching is achieved for the conversion from H-plane ridge waveguide 1 to air waveguide 2. The conversion results of the waveguide device from H-plane ridge waveguide to air waveguide are shown. The results show that the conversion efficiency from H-plane ridge waveguide 1 to air waveguide 2 is as high as 90% in the range of 70.5 GHz to 81 GHz, and the relative bandwidth reaches 13.6% (@77 GHz).
[0021] This waveguide conversion structure has a simple manufacturing process, and when it is arranged in a chip, there is less mutual interference between signal channels, and the circuit layout is simpler and more flexible, which can meet more diverse design needs.
[0022] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A waveguide device of an H-plane ridge waveguide-to-air waveguide transition, comprising an H-plane ridge waveguide (1) and an air waveguide (2), characterized in that, It also includes: a conversion waveguide (3), on which an L-shaped cavity (4) is provided to convert the H-plane ridge waveguide (1) into an air waveguide (2), the H-plane ridge waveguide (1) is located on the front side of the conversion waveguide (3), and the air waveguide (2) is located on the left side of the conversion waveguide (3).
2. The H-plane ridge waveguide-to-air waveguide transition of claim 1, wherein, The H-plane ridge waveguide (1) is fixedly installed on the front side of the conversion waveguide (3).
3. The H-plane ridge waveguide-to-air waveguide transition of claim 2, wherein, The air waveguide (2) is fixedly installed on the left side of the conversion waveguide (3).
4. The waveguide device for converting an H-plane ridge waveguide to an air waveguide according to claim 3, characterized in that, The rear side of the H-plane ridge waveguide (1) is connected to the front side of the L-shaped cavity (4).
5. The H-plane ridge waveguide-to-air waveguide transition of claim 4, wherein, The right side of the air waveguide (2) is connected to the left side of the L-shaped cavity (4).
6. The H-plane ridge waveguide-to-air waveguide transition of claim 5, wherein, The closest distance between the rear sidewall (41) of the L-shaped cavity and the H-plane ridge waveguide (1) is λg / 2, where λg represents the waveguide wavelength, i.e. the wavelength of electromagnetic waves propagating inside the waveguide.
7. The H-plane ridge waveguide-to-air waveguide transition of claim 6, wherein, The distance between the right side wall (42) of the L-shaped cavity and the center of the H-plane ridge waveguide (1) is λg / 4.