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中文摘要：
带状注扩展互作用速调管通过采用宽高比值很大的带状电子注来降低空间电荷效应,采用多间隙结构来增加功率容量,是一种高频率、高功率的微波真空放大器件。本文利用CST Microwave Studio与MAGIC设计了2π模W波段带状注五间隙扩展互作用谐振腔,重点研究了五间隙谐振腔关键结构参数对谐振腔特性阻抗与谐振频率的影响,并对器件稳定性与带状注双腔速调管注波互作用特性进行了三维MAGIC仿真与分析。最后,在电子注电压为19.5 kV,电流为3.5 A时,获得大于8 kW的输出功率、23 dB左右的增益。
英文摘要：
The sheet-beamextendedinteraction klystron （SB-EIK）is a high-frequency high-power millimeter-wave vacuum amplifier, which uses a high aspect ratio sheet beamto reduce space charge effects anda muhi-gap structure to increase power capability. Here, the W-band sheet-beam five-cell extended interaction cavity working in 2π mode wasdesignedby using the sol,ware CST Microwave Studio and electromagneticparticle-in-cell（PIC）codeMAG1C. The impacts of the key structural parameters of the five-cell cavity on the characteristic impedance and resonant frequency were investi- gated. In addition, the device stability and characteristics of beam-wave interaction were simulated with 3-D MAGIC. The simulated results show that for a sheet beam with a voltage of 19.5 kV and a current of 3.5 A, the newly-designed Wband sheet-beam klystronis capable of generating an output power higher than 8kW and a gain of 23 dB.
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