Compact dual-confocal waveguide gyrotron traveling wave tube input coupler
A technology of input coupling and traveling wave tube, applied in the field of millimeter-wave vacuum electronic devices, can solve the problems of difficult processing and complex input structure of confocal waveguide gyro-traveling wave tube, and achieve high-efficiency mode conversion, simple structure, and wide operating frequency band Effect
Active Publication Date: 2021-07-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0005] The purpose of the present invention is to provide a compact double confocal waveguide gyrotraveling wave tube input coupler to solve the problems of complex input structure and difficult processing of the confocal waveguide gyrotraveling wave tube in the prior art
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Embodiment 1
[0025] According to the above content, the input coupler of the present invention is manufactured, and the working frequency of the coupler is 220 GHz. The working mode of the gyrotron traveling wave tube is TE06 mode, and the input mode is TE10 mode. The main structural dimensions of the manufactured compact double confocal waveguide gyro TWT input coupler are as follows:
[0026] The standard rectangular waveguide 1 is a standard WR-5 rectangular waveguide (1.2954mm×0.6477mm). The double confocal waveguide is a gradual structure, where the cut-off section L1=4.3mm, the cut-off section curvature radius R1=3.46mm; the straight section L2=5.6mm, the straight section curvature radius R2=4.3mm; the output section L3=7mm, the output section The radius of curvature R3 = 4.52 mm; the mirror width is 2a, where a ranges from 1.5 mm to 2.4 mm. In order to obtain the optimal mode conversion efficiency, the value of a in embodiment 1 is 1.6 mm.
[0027] The S11 obtained by the paramete...
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The invention belongs to the field of millimeter wave vacuum electronic devices, and particularly relates to a compact dual-confocal waveguide gyrotron traveling wave tube input coupler which comprises a dual-confocal waveguide and a standard rectangular waveguide. The dual-confocal waveguide comprises four open confocal waveguide mirror surfaces which are uniformly arranged in the angular direction. The four open confocal waveguide mirror surfaces are the same in size, and the mirror surface distance between the four open confocal waveguide mirror surfaces is equal to the radius of curvature. The standard rectangular waveguide serves as an input waveguide and is vertically arranged on one of the open confocal waveguide mirror surfaces, and a coupling hole is formed in the joint of the open confocal waveguide mirror surface and the standard rectangular waveguide. A fundamental mode in the standard rectangular waveguide enters the dual-confocal waveguide through the coupling hole, and excites a working mode required by the gyrotron traveling wave tube to finish mode conversion of electromagnetic waves. Compared with a confocal waveguide mode converter in the prior art, the input coupler has the advantages of being simple in structure and easy to machine, can be used for experimental testing and is wide in working frequency band.
Description
technical field [0001] The invention belongs to the field of millimeter-wave vacuum electronic devices, and relates to a waveguide mode converter, specifically a compact double-confocal waveguide cyclotronic traveling wave tube input coupler, which can be applied to cyclotronic traveling waves working in the millimeter wave and terahertz bands Tube. Background technique [0002] The cyclotron traveling wave tube is an electric vacuum device that amplifies the input microwave signal. It has the characteristics of high power, wide bandwidth and high gain. It has been widely used in the fields of electronic countermeasures, radar systems and high-speed wireless communications. [0003] The cyclotron traveling wave tube adopts the working mode of fast wave transverse transduction, and uses the input signal to modulate the velocity of the cyclotron beam. Due to the relativistic mass effect, it gradually forms angular clustering, and surrenders energy in the beam-wave interaction,...
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IPC IPC(8): H01J23/40H01J25/34
CPCH01J23/40H01J25/34
Inventor 张佳一关晓通傅文杰鄢扬
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA