Confocal waveguide ceramic open annulated column microwave absorption device

Abstract

The present invention discloses a confocal waveguide ceramic open annulated column microwave absorption device and belongs to the microwave, millimeter wave and terahertz device technical field. The device comprises an open confocal waveguide mirror, an input end, an output end and open annulated columns, wherein the open confocal waveguide mirror is in longitudinal symmetry, the input end and the output end are extension sections at two ends of the open confocal waveguide mirror respectively, and the open annulated columns are symmetrically arranged at two sides of the open confocal waveguide mirror. According to the confocal waveguide ceramic open annulated column microwave absorption device of the invention, the ceramic open annulated columns are adopted to absorb energy irradiated from a high-frequency interaction structure, and diffracted microwaves can be reflected and absorbed many times in the cavities of the annulated columns, and therefore, backward wave oscillation can be better suppressed, local overheating can be prevented, the heat dissipation problem of the high-frequency interaction system can be solved to a certain extent, and the stability of a confocal waveguide gyro travelling wave tube can be improved; and compared with other structures of the same size with the open annulated columns, the open annulated columns have a larger internal surface area and a greater superficial area for absorbing radiation electromagnetic waves and have higher microwave absorption efficiency, thereby improving the average power capacity and stability of the confocal waveguide gyro travelling wave tube.

Description

technical field [0001] The invention belongs to the technical field of microwave, millimeter wave and terahertz devices, in particular to a confocal waveguide dielectric ceramic ring microwave absorbing device, which can be applied to confocal waveguide cyclotron amplification devices and confocal waveguides in millimeter wave and terahertz bands cyclotron oscillator. Background technique [0002] The cyclotron traveling wave tube is an electric vacuum amplifier based on the electronic cyclotron maser effect, which can realize high-power, broadband, and high-efficiency electromagnetic wave power output in the millimeter wave and even terahertz frequency bands. It has important application prospects in microwave countermeasures, electronic warfare and microwave communication systems. At present, the cyclotron traveling wave tube is still in the development stage. In order to increase the output power of the cyclotron traveling wave tube, it is generally used to increase the ...

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Problems solved by technology

China Academy of Engineering Physics in China also works on HE at 140GHz 06 The confocal waveguide gyrotraveling wave tube of the confocal waveguide mode has been studied and designed. In the design, the inner wall of the outer sleeve is coated with a wave-absorbing material coating (as shown in the attached figure 2 shown) to absorb the diffracted electromagnetic wave and prevent the parasitic mode from reflecting back to the interaction structure, but its absorption of the diffracted electromagnetic wave is not complete, and the output efficiency is not high

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