Circularly symmetrical TE0n mode filter

Abstract

The invention provides a circularly symmetrical TE0n mode filter. The filter comprises a first circular waveguide section, a mode filtering section and a second circular waveguide section which are concentrically connected in sequence from top to bottom, the three sections are hollow metal cylindrical cavities, and the first circular waveguide section serves as an input interface of the mode filter; the second circular waveguide section is used as an output circular waveguide interface of the mode filter; and a plurality of rectangular metal diaphragms which are the same in shape and size and are arranged in a radial shape are embedded in the mode filtering section, and the metal diaphragms are radially and uniformly distributed on the circumference with the center of the mode filtering section as the circle center and the length of the metal diaphragms as the radius. The circularly symmetrical TE0n mode filter is compact in structure, easy to process and implement and high in power capacity, can be used in a power synthesis system based on a circular waveguide TE0n mode, improves the effective working frequency bandwidth and synthesis efficiency of a radial power synthesizer based on the circular waveguide TE0n mode, and realizes microwave and millimeter wave multi-path broadband high-efficiency high-power synthesis.

Description

technical field [0001] The invention belongs to the technical field of microwave and millimeter wave terahertz, in particular to the technical field of millimeter wave terahertz waveguide space radial power combination. Background technique [0002] In the field of microwave and millimeter wave multi-channel high power combination, based on circular symmetric TE 0n Mode-based waveguide space radial power combining technology has attracted much attention due to its technical characteristics of multiple combining branches, low loss and large power capacity. In this type of combination technology, multiple single-mode (rectangular waveguide TE10 mode or microstrip line TEM mode) branch power signals are combined into a circularly symmetrical TE in the form of a radial frame. 0n Mode signal, so as to realize the waveguide space multi-path direction power combination. [0003] Like other power amplification and combination technologies, the radial power combination process of t...

AI Technical Summary

Problems solved by technology

[0004] In fact, based on circular symmetry TE 0n In the waveguide space radial power combination technology of the mode, due to the circular symmetry TE used in the power combination 0n The mode is a high-order mode, which is easily affected by the low-order mode; and the non-ideality of any link in the synthesis system may lead to non-circular symmetric TE 0n pattern generation

These non-circularly symmetric modes severely limit the circularly symmetric TE 0n The working bandwidth and efficiency of waveguide space radial power combining technology in corresponding power combining system

[0005] In addition, based on circular symmetry TE 0n In the actual system application of the waveguide space radial power combination of the mode, it is often necessary to realize the common mode of the system (mostly the rectangular waveguide TE10 mode, the microstrip TEM mode or the coaxial TEM mode) and the circular symmetric TE mode. 0n The transition conversion of the mode signal, so that the mode converter introduced in practical applications will definitely stimulate other non-circularly symmetrical TEs due to structural or process factors. 0n mode, thus destroying the amplitude and phase consistency of each radial branch in the system and reducing the power combination efficiency

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