Common end structure of D wave band-waveguide duplexer
By setting the step adjustment position in the cavity of the waveguide duplexer and adjusting the port impedance, the matching problem caused by the H-side T junction is solved, the echo design requirements are realized, and signal selectivity and frequency resource utilization efficiency are improved.
Patent Information
- Application Number
- CN202323462701.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-19
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2033-12-19
AI Technical Summary
When designing a waveguide duplexer, the characteristics of the H-plane T-junction lead to the same phase of the output port and the smaller longitudinal size, so it is impossible to match all ports at the same time, resulting in the echo not meeting the design requirements.
By setting the step adjustment position in the cavity, adjusting the impedance between the ports, the balance between the low-end and high-end band impedances is achieved, thereby matching the common port.
The port impedance is matched by different step lengths and thicknesses, so that the echo meets the design requirements and improves signal selectivity and frequency resource utilization efficiency.
Smart Images
Figure CN222463387U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of waveguide duplexers and relates to a common end structure of a D-band waveguide duplexer. Background Art
[0002] In communication base stations, millimeter wave duplexers are devices used to separate a signal covering a large frequency range into two frequency ranges or to combine two frequency ranges into one signal spectrum. The working principle is as follows: Figure 1 As shown. With the development of science and technology, the emergence of various communication systems has led to increasingly dense frequency coverage and increasingly scarce frequency resources. In order to better and more efficiently utilize frequency resources and improve signal selectivity, the frequency interval between channels needs to be smaller and smaller, and the isolation requirements between channels need to be greater and greater. When it is necessary to design a waveguide duplexer, in the D-(130-165GHz) band of the millimeter wave band, the L-band frequency band is 130GHz-143.5GHz, and the H-band frequency band is 149GHz-165GHz. Since the characteristics of the H-plane T-junction are that the phases of the output ports are the same and the longitudinal dimensions are small, and the H-plane structure is a simple three-port network, matching cannot be achieved at all ports at the same time.
[0003] Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. Utility Model Content
[0004] The utility model aims to provide a common end structure of a D-band waveguide duplexer, and realizes the design index requirements by changing the structure of the common end.
[0005] The purpose of the utility model is achieved through the following technical solutions:
[0006] A common end structure of a D-band-waveguide duplexer is arranged in a cavity, and a cover plate is arranged above the cavity; it includes an L-end frequency band, an H-end frequency band and a common-end waveguide port, and a step is arranged on the cover plate corresponding to the common-end waveguide port; the length and thickness of the step toward the L-end frequency band reach 1 / 5 of the thickness of the cavity, and the length and thickness of the step toward the H-end frequency band reach 1 / 2 times.
[0007] Furthermore, a step adjustment position is provided at the intersection of the L-end frequency band, the H-end frequency band and the common-end waveguide port, and the shape of the step adjustment position is a "convex" structure.
[0008] The above technical solution has the following beneficial effects: the impedance between ports is changed through different steps to match the impedance balance of the low-end frequency band and the high-end frequency band of the port, thereby solving the problem of common end matching and achieving the echo meeting the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.
[0010] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.
[0011] Figure 1 It is a schematic diagram of the working principle of a duplexer in the background technology.
[0012] Figure 2 This is a schematic diagram of the distribution of the cavity, cover plate, and common-end waveguide port provided by the utility model.
[0013] Figure 3 The present invention is provided as a three-dimensional schematic diagram.
[0014] Figure 4 for Figure 3 A magnified schematic diagram of area A in the middle.
[0015] Figure 5 This is a schematic diagram of the distribution of the cavity, cover plate, and common-end waveguide port provided by the utility model.
[0016] Figure 6 Provide a performance test diagram for the utility model.
[0017] In the figure: 1- cavity; 2- cover plate; 3- common end waveguide port; 4- L end frequency band; 5- H end frequency band; 6- step adjustment position. DETAILED DESCRIPTION
[0018] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0019] Example
[0020] See also Figure 1-Figure 6 As shown, a common end structure of a D-band-waveguide duplexer is arranged in a cavity 1, a cover plate 2 is arranged above the cavity 1, and a common end waveguide port 3 is arranged on the cavity 1. The common end structure is applied to the L-end frequency band 4, the H-end frequency band 5 and the common end waveguide port 3. A step adjustment position 6 is arranged at the intersection of the three, and the shape of the step adjustment position is a "convex" structure.
[0021] A metal resonator is arranged in the cavity 1, and coupling holes are opened between the metal resonators. The surface of the material is silver-plated. A step is arranged on the cover plate 2 corresponding to the common end waveguide port 3. Different steps are used to change the impedance between the ports to match the impedance balance of the low-end frequency band and the high-end frequency band of the port, thereby achieving the common end matching problem, so that the echo meets the design requirements.
[0022] Specifically, a method is provided for adding different steps to the cover plate corresponding to the WR-07 impedance common waveguide port to transform the impedance of the port to match the impedance balance between the low-end frequency band and the high-end frequency band of the port. When the length and thickness of the step extending to the L-end frequency band reach 1 / 5 of the thickness of a certain cavity H, the impedance between the common end and the first cavity at the low end can meet the design requirements, and the echo indicators of the low-end and high-end frequency bands can meet the requirements. On the contrary, when the length and thickness of the step extending to the H-end frequency band reach 1 / 2 times, the impedance between the common end and the first cavity at the high end can meet the design requirements, and the echo indicators of the high-end frequency band can meet the requirements.
[0023] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.
Claims
1. A common end structure of a D-band waveguide duplexer, arranged in a cavity, with a cover plate provided above the cavity; characterized in that: It includes an L-end frequency band, an H-end frequency band and a common-end waveguide port, and a step is arranged on the cover plate corresponding to the common-end waveguide port; the length and thickness of the step toward the L-end frequency band reach 1 / 5 of the thickness of the cavity, and the length and thickness of the step toward the H-end frequency band reach 1 / 2 times.
2. The common terminal structure according to claim 1, characterized in that: A step adjustment position is provided at the intersection of the L-end frequency band, the H-end frequency band and the common-end waveguide port, and the shape of the step adjustment position is a "convex" structure.