基于电子注嵌入光栅的0.55 THz返波振荡器的结构设计与注波互作用的分析  

The Design of Structure and Analysis of Beam-Wave Interaction of a 0.55 THz Backward-Wave Oscillator Based on Embedded Electron Beam

作　　者：叶青青 刘文鑫[1] 张连正[1] Ye Qingqing;Lm Wenxin;Zhang Lianzheng(Key Laboratory of High Power Microwave Sources and Technologies,Institute of Electronics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院电子学研究所高功率微波源与技术重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《真空科学与技术学报》2019年第1期53-57,共5页Chinese Journal of Vacuum Science and Technology

摘　　要：根据矩形栅慢波结构的色散公式初步确定各结构参数,并分析了各结构参数的变化对色散曲线的影响,用CST微波工作室仿真,计算并对比分析嵌入与未嵌入圆形电子注的高频特性的变化趋势,得出前者对应的色散曲线和耦合阻抗曲线要大于后者的结论。利用CST粒子工作室进行注波互作用模拟,权衡起振时间和输出功率关系,确定整管的仿真长度。研究了电子注嵌入深度、填充比、电流大小对输出功率的影响,优化结构参数,最终得到14. 6 W的稳定输出功率,与Magic计算出的结果相吻合。The 0. 55 THz backward-wave oscillator,with slot-structured rectangular grating involving cylindrical electron beam,was developed. Dimensions of the slot structure,including the period length,slot width/depth,rectangular-grating width and waveguide height,were optimized by numerically solving the theoretically derived dispersion equation with Matlab. The beam-wave interaction was simulated with CST MICROWAVE STUDIO software.The simulated results show that the eigen-mode frequency and interaction impedance of the slot-structure are higher than those of the slot-less structure. The length of the backward-wave oscillator was determined by compromising between the oscillation-start time and output power. Besides,the influence of the slot-depth,filling-rate,and current on the output power was investigated via CST and Magic simulations. The optimized slot-depth,filling-rate and current resulted in a steady output power of 14. 6 W. The CST and Magic simulation results were found to be basically in agreement.

关 键 词：返波管 注波互作用 电子注 矩形栅 

分 类 号：TN124[电子电信—物理电子学]