Terahertz power dividing or combining device based on circular waveguide mode conversion

Abstract

The utility model relates to a terahertz power dividing or combining device based on circular waveguide mode conversion. The terahertz power dividing or combining device comprises a mode converter and a multipath radial power combiner. The first input / output port is respectively connected with the first sides of the two C-shaped matching structures through the stepped matching structure and the conical matching structure in sequence, and the second sides of the two C-shaped matching structures are connected with the first circular waveguide below; the first circular waveguide is connected with a second circular waveguide below the first circular waveguide, a plurality of second input / output ports are uniformly distributed at the bottom of the second circular waveguide along the circumferential direction, and a step transformation structure is arranged at the bottom of one side, far away from the second circular waveguide, of each second input / output port. According to the utility model, through the mode converter and the multipath radial power combiner, a high-performance terahertz power synthesis network scheme with 220GHz, a miniaturized structure, high return loss and low amplitude unbalance degree is provided.

Description

Technical Field

[0001] The utility model relates to the technical field related to millimeter wave power synthesis, and in particular to a terahertz power division or synthesis device based on circular waveguide mode conversion. Background Art

[0002] With the development of wireless communication technology, power dividers / combiners have more and more extensive application value in wireless communication systems. In the terahertz frequency band, the lack of high-power signal sources has restricted the application of wireless communication technology in the terahertz frequency band. Therefore, terahertz multi-channel power synthesis technology is expected to become one of the important technical means to solve the low-power problem of terahertz signal sources. In the terahertz frequency band, the waveguide structure has the advantages of large power capacity, low loss, and good heat dissipation performance. It has important application value in the terahertz frequency band. Therefore, it is necessary to design the multi-channel power splitter / synthesizer circuit of the terahertz frequency band waveguide structure.

[0003] In view of the above-mentioned defects, the designers have actively carried out research and innovation in order to create a terahertz power division or synthesis device based on circular waveguide mode conversion to make it more valuable for industrial use. Utility Model Content

[0004] In order to solve any of the above technical problems, the purpose of the utility model is to provide a terahertz power division or synthesis device based on circular waveguide mode conversion.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A terahertz power splitting or synthesizing device based on circular waveguide mode conversion, comprising a mode converter and a multi-path directional power synthesizer;

[0007] The mode converter comprises a first input / output port, two C-type matching structures and a first circular waveguide, wherein the first input / output port is connected to the first sides of the two C-type matching structures respectively through a step matching structure and a tapered matching structure, and the second sides of the two C-type matching structures are connected to the first circular waveguide below;

[0008] The multi-path directional power combiner includes a second circular waveguide and a plurality of second input / output ports. The first circular waveguide is connected to the second circular waveguide below. A plurality of second input / output ports are evenly distributed along the circumferential direction at the bottom of the second circular waveguide. A step transformation structure is arranged at the bottom of the second input / output port on one side away from the second circular waveguide.

[0009] As a further improvement of the present invention, the second sides of the two C-shaped matching structures are connected to the first circular waveguide below through a first circular hole-shaped matching structure.

[0010] As a further improvement of the present invention, the bottom of the second circular waveguide is connected to a plurality of second input / output ports below through a second circular hole-shaped matching structure.

[0011] As a further improvement of the present invention, the step matching structure is a one-step step structure.

[0012] As a further improvement of the present invention, the step transformation structure is a two-step step structure.

[0013] As a further improvement of the present invention, the number of the second input / output ports is eight.

[0014] As a further improvement of the present invention, the first circular waveguide and the second circular waveguide are integrally formed.

[0015] By means of the above solution, the utility model has at least the following advantages:

[0016] 1. The utility model proposes a high-performance terahertz power synthesis network solution with a 220 GHz frequency, a miniaturized structure, high return loss and low amplitude imbalance through a mode converter and a multi-path power synthesizer.

[0017] 2. Wide frequency band: The operating frequency band is 210-230GHz.

[0018] 3. High return loss: The return loss in the passband is less than -19dB.

[0019] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of a terahertz power splitting or synthesizing device based on circular waveguide mode conversion of the utility model;

[0022] Figure 2 yes Figure 1 Schematic diagram of the structure of the medium mode converter;

[0023] Figure 3 yes Figure 1A schematic diagram of the structure of the multi-path directional power combiner;

[0024] Figure 4 yes Figure 1 Schematic diagram of simulation results of the medium mode converter;

[0025] Figure 5 yes Figure 1 Schematic diagram of simulation results of multi-path power combiner;

[0026] Figure 6 yes Figure 1 Schematic diagram of simulation results.

[0027] The meanings of the various reference numerals in the figures are as follows.

[0028] Mode converter 1, multi-path power combiner 2;

[0029] A first input / output port 11, a step matching structure 12, a tapered matching structure 13, a C-type matching structure 14, a first circular hole matching structure 15, and a first circular waveguide 16;

[0030] A second circular waveguide 21 , a second input / output port 22 , a second circular hole-shaped matching structure 23 , and a step-changing structure 24 . DETAILED DESCRIPTION

[0031] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] In order to make the technical personnel in the technical field better understand the scheme of the utility model, the technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but only represents the selected embodiment of the utility model. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the utility model.

[0033] Example

[0034] like Figure 1 to Figure 6 As shown,

[0035] A terahertz power splitting or synthesizing device based on circular waveguide mode conversion comprises a mode converter 1 and a multi-path directional power synthesizer 2.

[0036] 1. The mode converter 1 comprises a first input / output port 11, two C-type matching structures 14 and a first circular waveguide 16. The first input / output port 11 is connected to the first sides of the two C-type matching structures 14 respectively through a step matching structure 12 and a tapered matching structure 13. The second sides of the two C-type matching structures 14 are connected to the first circular waveguide 16 below.

[0037] The second sides of the two C-shaped matching structures 14 are connected to the first circular waveguide 16 below through the first circular hole-shaped matching structure 15 , and the step matching structure 12 is a single-step step structure.

[0038] 2. The multi-path directional power combiner 2 includes a second circular waveguide 21 and a plurality of second input / output ports 22. Specifically, the number of the second input / output ports 22 is eight. The first circular waveguide 16 is connected to the second circular waveguide 21 below. A plurality of second input / output ports 22 are evenly distributed along the circumferential direction at the bottom of the second circular waveguide 21. A step transformation structure 24 is provided at the bottom of the second input / output port 22 away from the second circular waveguide 21.

[0039] Through the above-mentioned multiple matching structures, better return loss can be obtained.

[0040] The bottom of the second circular waveguide 21 is connected to a plurality of second input / output ports 22 below through a second circular hole-shaped matching structure 23, and the step transformation structure 24 is a two-step step structure.

[0041] The above-mentioned multiple input / output ports are all WR4.3 standard rectangular waveguide ports.

[0042] Furthermore, the first circular waveguide 16 and the second circular waveguide 21 are integrally formed.

[0043] The utility model relates to a terahertz power division or synthesis device based on circular waveguide mode conversion, specifically based on the TM01 mode of the rotationally symmetric high-order mode in the circular waveguide. The field of this mode is evenly distributed along the axial direction of the circular waveguide, so it is divided into multiple signals with equal amplitudes through a radial cavity to form a power division / synthesis network, thereby realizing a 220GHz eight-way power synthesis network with a miniaturized structure.

[0044] The utility model is implemented by the following technical scheme: the structure is mainly composed of a TE10-TM01 mode converter 1 and a multi-path power synthesizer 2, a two-way power divider is formed by HT branching, and then the signal divided into two is power synthesized through a circular waveguide, the two-way signal enters the circular waveguide at the same time to excite the circular waveguide TM01 mode signal, and then the TM01 mode signal is divided into eight equal amplitude signals through a radial cavity, the signal is output after the bandwidth is expanded through a non-standard waveguide, and then the output non-standard waveguide is converted into a standard waveguide for output (that is, the action bandwidth is increased) through a step transformation structure, and finally an eight-way power division / synthesis network structure is formed.

[0045] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0046] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A terahertz power splitting or synthesizing device based on circular waveguide mode conversion, comprising a mode converter (1) and a multi-path directional power synthesizer (2); Features: The mode converter (1) comprises a first input / output port (11), two C-type matching structures (14) and a first circular waveguide (16); the first input / output port (11) is connected to first sides of the two C-type matching structures (14) respectively through a step matching structure (12) and a tapered matching structure (13); and the second sides of the two C-type matching structures (14) are connected to the first circular waveguide (16) below. The multi-path directional power combiner (2) comprises a second circular waveguide (21) and a plurality of second input / output ports (22); the first circular waveguide (16) is connected to the second circular waveguide (21) below; a plurality of second input / output ports (22) are evenly distributed along a circumferential direction at the bottom of the second circular waveguide (21); and a step transformation structure (24) is provided at the bottom of the second input / output port (22) on a side away from the second circular waveguide (21).

2. A terahertz power splitting or synthesizing device based on circular waveguide mode conversion as claimed in claim 1, characterized in that: The second sides of the two C-shaped matching structures (14) are connected to the first circular waveguide (16) below through the first circular hole-shaped matching structure (15).

3. A terahertz power splitting or synthesizing device based on circular waveguide mode conversion as claimed in claim 1, characterized in that: The bottom of the second circular waveguide (21) is connected to a plurality of second input / output ports (22) below via a second circular hole-shaped matching structure (23).

4. A terahertz power splitting or synthesizing device based on circular waveguide mode conversion as claimed in claim 1, characterized in that: The step matching structure (12) is a one-step step structure.

5. A terahertz power splitting or synthesizing device based on circular waveguide mode conversion as claimed in claim 1, characterized in that: The step transformation structure (24) is a two-step step structure.

6. A terahertz power splitting or synthesizing device based on circular waveguide mode conversion as claimed in claim 1, characterized in that: The number of the second input / output ports (22) is eight.

7. A terahertz power splitting or synthesizing device based on circular waveguide mode conversion as claimed in claim 1, characterized in that: The first circular waveguide (16) and the second circular waveguide (21) are integrally formed.

Images