改进2.5维多频大信号互作用程序模拟螺旋线行波管非线性交调互调特性  

Simulation of Cross-Modulation and Inter-Modulation of 2.5D Multi-Frequency Large Signal in Helix Traveling Wave Tube

作　　者：郝保良[1,2] 唐康淞[1] 肖刘[1] 李实[1] 黄明光[1] 刘濮鲲[1] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《真空科学与技术学报》2011年第1期27-31,共5页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金重点项目(60931001);国家自然科学基金资助项目(60801030)

摘　　要：改进稳态行波管场论大信号互作用模型,将工作频率考虑为最小公因子基波的整数倍,采用频域等效粒子模拟算法,求解离散化亥姆霍兹方程获得空间电荷场数值解,建立半解析半粒子的2.5维行波管多频互作用模型,模拟多频工作时行波管中信号间的交调和互调的非线性特性,计算结果与L波段螺旋线行波管的互调、三阶和五阶交调试验比较具有较好的一致性。A semi-analytical,semi-particle,2.5-dimension,multi-frequency interaction model was developed to numerically simulate the cross-modulation and inter-modulation of the large signal of the traveling wave tube（TWT）,operating in a multi-frequency mode.In the simulation,the operating frequencies were assumed to be integer multiples of a base frequency,i.e.,the lowest frequency;and the space charge field distributions were evaluated by solving the discrete Helmholtz equations,assisted by the modified particle-in-cell method.The simulated results in the two-tone simulation agree fairly well with the experimental results involving the inter-modulation,and the 3rd and 5th cross-modulation of an L-band TWT.

关 键 词：行波管 注波互作用 多频 交调互调 

分 类 号：TN122[电子电信—物理电子学]