用FDTD法计算不规则截面传输线的截止频率  

FDTD Method Analysis of Cutoff Frequency of Non-regular Transmission Line

作　　者：李汝恒[1] 张学清[1] 

机构地区：[1]大理学院物理与电子信息学院,云南大理671003

出　　处：《云南师范大学学报（自然科学版）》2007年第4期59-62,共4页Journal of Yunnan Normal University:Natural Sciences Edition

摘　　要：给出直角坐标系下用时域有限差分(FDTD)方法计算电磁场问题的差分格式,详细介绍了用FDTD法分析不规则传输线高阶模截止频率的计算过程。实例计算了矩形波导的截止频率,并与解析解进行比较;计算了几种复杂边界传输线的高阶模截止频率随内导体变化的情况,给出传输线TE1模的模场分布。该方法也可推广应用于各种复杂截面波导、复杂截面传输线传输特性的分析和计算。This paper presents the method of computation for non - regular transmission line by using finite- difference time - domain （FDTD） method. In order to demonstrate the availability of the method, the cutofffrequency of empty rectangular waveguide was calculated and a comparison was given. As an application, repre-sentative computational examples, including L - and T - shape transmission line, are given to validate the theory.

关 键 词：时域有限差分法 不规则传输线 高阶模 截止频率 

分 类 号：O451[理学—无线电物理]