利用等效电路模型计算耦合腔行波管注-波互作用  

Calculation of beam-wave interaction of coupled-cavity TWT using equivalent circuit model

作　　者：白春江[1] 李建清[1] 胡玉禄[1] 杨中海[1] 李斌[1] 

机构地区：[1]电子科技大学微波电真空器件国家级重点实验室,成都610054

出　　处：《物理学报》2012年第17期539-544,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60801029;10876005;60931001;61071030;10905009)资助的课题~~

摘　　要：通过研究Curnow等效电路模型,得到进行单腔计算的矩阵方程,进而获得线路场方程,结合运动方程和空间电荷场方程,从而推导出耦合腔行波管一维注波互作用非线性理论模型.该理论能计算任意的切断、跳变、渐变等结构以及多信号模拟.利用该理论编制的软件计算了59 GHz—64 GHz耦合腔行波管AM-PM相位失真,三阶互调以及五阶互调分量.同时模拟得到了59 GHz—64 GHz带内饱和输出功率分布,理论结果与热测结果误差在5%以内.A nonlinear model for the numerical simulation of coupled-cavity traveling wave tube is described. The model is based on the Curnow equivalent circuit from which the matrix equations for the fields of any single cavity can be obtained. And the model can be divided into the matrix equations, the motion equations and the space-charge field equations, in which the sever, dynamic tapering in the circuit and the multiple-frequency signal amplification can be also considered. The simulation is used to analyze the nonlinear AM-PM distortion and the intermodulation products of a coupled cavity TWT whose working frequencies range from 59 GHz to 64 GHz. And the analysis of the saturated output power within the frequency band is also included. Comparing the simulation results with the measurements, the percentage difference between the calculation results and the test results is less than 5%.

关 键 词：耦合腔行波管 注波互作用 非线性理论 等效电路 

分 类 号：TN124[电子电信—物理电子学]