利用三维粒子软件计算螺旋线行波管的互作用和三阶互调  

Simulation of a Helix TWT Interaction and IM3 Using 3D Particle Codes

作　　者：李力[1] 冯进军[1] 

机构地区：[1]北京真空电子技术研究所大功率微波电真空器件技术国防科技重点实验室,北京100015

出　　处：《真空电子技术》2010年第2期48-50,共3页Vacuum Electronics

摘　　要：采用三维电磁软件CST粒子工作室模拟单信号输入时某Ku波段螺旋线行波管的互作用及双信号输入时该行波管的三阶互调。模拟计算时,采用理想电子注和均匀聚焦磁场,对衰减器采用分段处理,通过设置每段衰减器材料的损耗正切值来表征其衰减量。单信号输入互作用模拟计算结果与实测结果非常接近,通过模拟得到了行波管双信号输入时两个基波信号输出功率以及三阶互调(IM3)产物,并给出输出信号的快速傅立叶变化频谱。The beam-wave interaction and IM3 of a Ku band helix TWT are simulated with CST Particle Studio with one and two signals input.Using ideal electron beam to interact with the slow wave and it is focused with uniform magnetic field,the attenuator is divided for many sections and the decrement of every section is represented with the loss tangent of its material.The results of interaction simulation with one signal input are close to the test results,the output power of two signals and IM3（both 2f1-f2 and 2f2-f1） products are obtained with two signals input,and the FFTs of the output signal presented.

关 键 词：TWT 输出功率 增益 IM3 

分 类 号：TN124.2[电子电信—物理电子学]