时域等效电路法求解耦合腔行波管色散特性的研究  

Research of time-domain equivalent circuit method in solving dispersion of coupled-cavity traveling-wave tube

作　　者：李文君[1,2] 许州[2] 林郁正[1] 黎明[2] 杨兴繁[2] 陈亚男[2] 刘婕[2] 金晓[2] 

机构地区：[1]清华大学工程物理系,北京100084 [2]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《核电子学与探测技术》2008年第5期1037-1040,共4页Nuclear Electronics & Detection Technology

基　　金：中国工程物理研究院资助课题

摘　　要：应用时域等效电路法求解耦合腔行波管的色散特性:从行波管耦合腔链的等效电路模型出发,推导了模型的时域电路方程组,采用四阶龙格-库塔法数值求解该方程组,用MATLAB编写了计算程序CTTDCP;使用CTTDCP程序计算了某L波段耦合腔行波管的色散特性,求得该管腔通带在1.08-1.48GHz,计算结果与实验结果及电磁仿真模拟结果基本一致,证实了时域等效电路法的正确性和有效性。最后,提出了一种结合等效电路法和电磁仿真模拟优化行波管的管型设计方式。In this paper,a time-domain equivalent circuit method is applied to solve dispersion of coupled- cavity travelling-wave tube （CCTWT）. First, the time-domain circuit equations of CCTWT coupled-cavity chain are deduced from the equivalent circuit model. Then, the equations are solved numerically by fourth-order Runge-Kutta method and a program CTTDCP is developed using MATLAB. Last, a L-band CCTWT is calculated using CTTDCP and the cavity pass-band of this tube is computed to be 1.08-1. 48GHz,which is consistent with the experimental results and the simulation results of electromagnetic code and demonstrates the validity of the time-domain equivalent circuit method. In addition, a new design method which uses the equivalent circuit method and electromagnetic simulation together to optimize the cold cavity characteristics of CCTWT is proposed.

关 键 词：时域等效电路法 耦合腔行波管 色散特性 MATLAB 

分 类 号：TN124[电子电信—物理电子学]