Diagnosis of asymmetric mode competition in triaxial klystron amplifier
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摘要: 为满足X波段三轴速调管放大器（TKA）各腔内部自激振荡的诊断需求,设计了一种结构简单紧凑、无需外部密封结构的新型波导耦合器。利用小孔耦合原理和CST仿真软件,针对TKA中常见的自激振荡TE61模式,对该耦合器的耦合特性进行了理论分析和仿真设计。结合PIC方法,建立了利用该耦合器诊断TKA同轴漂移管内传输微波频谱特性的物理模型。通过仿真计算,验证了所设计的耦合器用于TKA自激振荡诊断的有效性。Abstract: In order to meet the diagnosis requirements of asymmetric mode competition in an X-band triaxial klystron amplifier, a novel waveguide coupler with compact structure is designed, and its coupling characteristics for TE61 mode are analyzed with small-hole coupling principle and CST simulation software. A physical model is established by using PIC method to diagnose the spectrum characteristics in the TKA coaxial drift tube. Through simulation, the validity of the designed coupler to diagnose TKA asymmetric mode competition is verified.
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