A multi-frequency controllable mode converter for edge-hole disk-loaded waveguide

Abstract

The invention provides a multi-frequency controllable mode converter with an edge-hole plate-loaded waveguide, which includes a metal plate that divides the coaxial circular waveguide into two parts along the axial direction of the coaxial circular waveguide. One part of the waveguide is filled with cycle-tunable edge-hole disk-loaded waveguide, and the other part is a 180-degree fan-shaped coaxial waveguide. The TEM mode microwave with a frequency f in the coaxial circular waveguide is divided into two parts by the metal plate, and each of them is transmitted in the waveguide of its corresponding part. By adjusting the period of the edge hole plate charge waveguide corresponding to the microwave frequency f, After the transmission distance mp, the microwaves transmitted in the two waveguides produce a 180-degree phase difference, and the microwaves with frequency f are converted from TEM mode to TE 11 model. The present invention adopts the above-mentioned structure and method, and realizes that the order of multi-frequency points from low frequency to high frequency is converted from TEM mode to TE mode by adjusting the period of the edge plate-loaded waveguide. 11 model.

Description

technical field [0001] The invention belongs to the technical field of high-power microwave mode converters, and in particular relates to a multi-frequency controllable mode converter of an edge-hole disk-loaded waveguide. Background technique [0002] Most high-power microwave sources have rotationally symmetric structures, and most of the modes they generate are rotationally axisymmetric. The output of common high-power microwave sources, such as magnetic insulated wire oscillators, transit time oscillators, relativistic return wave tubes, and relativistic klystrons, are all in axisymmetric TEM mode or TM 01 model. The transverse electric field of these modes is axisymmetrically distributed, resulting in zero far-field axial radiation, which is the so-called hollow beam. This type of microwave mode is not conducive to the directional transmission and emission of high-power microwaves. In order to achieve directional radiation, the circular waveguide TM is usually 01 mod...

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Problems solved by technology

[0006] The invention provides an edge-hole disk-loaded waveguide multi-frequency controllable mode converter, which solves the problem of TM under the multi-frequency state of waveguide transmission. 01 Or high-power microwave in TEM mode, because most mode converters have frequency-selective characteristics (narrow frequency), and the structural characteristics determine that some converters (hyperbolic, radial linear mode converters) cannot change the structural parameters, or some Some converters (coaxial plug-in mode converters) have large structural changes, and cannot realize multi-frequency points from TEM mode to TE in the order of low frequency to high frequency. 11 For the mode conversion problem, the coaxial circular waveguide is divided into two parts by a metal plate. One part is an edge-hole plate-loaded waveguide whose filling period can be adjusted uniformly, and the other part is a 180-sector coaxial waveguide. The metal plate makes the inner frequency of the coaxial circular waveguide The TEM mode microwave with f is divided into two parts and each is transmitted in the waveguide of the corresponding part

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