回旋速调放大器输入谐振腔分析及数值模拟
Analysis and simulation of input cavity of gyroklystron amplifier
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摘要: 输入谐振腔将波导输入的高频信号转化为内腔中工作模式的驻波场，以实现对回旋电子注角向速度的调制。对输入谐振腔的同轴谐振腔和两端开孔的圆柱谐振腔分别进行了解析分析，数值计算中引入修正来反应耦合狭缝的影响，几min就能完成一种结构尺寸的计算分析。通过优化得到输入谐振腔的初步结构和尺寸，然后利用三维高频分析软件HFSS进行精确的模拟和修正，提高模式转化效率和纯度，获得了高性能的输入谐振腔。Abstract: Input cavity transforms the H10 mode in waveguide to H011 mode in inner resonant cavity, H011 mode is used to modulate the transverse velocity of gyroelectron beam. In this paper, an approximate analysis method is presented, theoretical analysis and numerical calculations have been completed, and then primitive structure and geometric parameters of the input cavity can be obtained in minutes. Afterward, HFSS code is used to simulate accurately and revise approximate analysis. Based on a large number of calculations and simulations, the optimal input cavity meeting the design requirement is attained.
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Key words:
- input cavity /
- coaxial cavity /
- coupling slot /
- gyroklystron amplifier /
- high power millimeter wave
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