同轴周期慢波结构色散特性的通用数值解法  

Universal algorithm for computing dispersion characteristics of arbitrary coaxial periodic slow-wave structure

作　　者：董烨[1] 董志伟[1] 杨温渊[1] 周海京[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100088

出　　处：《强激光与粒子束》2009年第8期1199-1206,共8页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(10705006);中国工程物理研究院基金项目(2005Z0403)

摘　　要：运用场匹配法和傅里叶级数理论,提出一种原则上可数值求解任意同轴周期慢波结构色散特性的方法,给出了同轴慢波结构TMon模的色散方程。基于该方法,编制了Matlab程序,给出了同轴波纹波导和同轴双波纹波导色散特性,以算例形式分析计算了同轴盘荷波导的色散特性。数值计算结果与多维全电磁模拟软件结果进行比较,证明了该数值算法的准确性和可靠性。This article has put forward a numerical method which could compute dispersion curves in an arbitrary coaxial periodic slow-wave structure, based on field-matching method and Fourier series theory. This numerical method has strong universality and expansibility in designing slow-wave structures. Using this numerical method, the dispersion curves of the coaxial sinusoidal ripple waveguide and the coaxial dual sinusoidal ripples waveguide were computed by programming Matlab codes, and their dispersion characteristics were analyzed and discussed. The dispersion curves of the coaxial disk-loaded waveguide were computed by this numerical method as an example. The numerical results were compared with the simulated results of a multidimensional full electromagnetic software, and the reliability of this numerical method was validated.

关 键 词：同轴周期慢波结构 色散特性 场匹配法 傅里叶级数 数值计算 高功率微波 

分 类 号：TN816[电子电信—信息与通信工程]