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.
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
关键词
时域有限差分法
不规则传输线
高阶模
截止频率
finite - difference time - domain
non - regular transmission line
high order mode
cutoff fre- quency
