北京航空航天大学学报 ›› 2000, Vol. 26 ›› Issue (3): 286-289.

• 论文 • 上一篇    下一篇

FDTD-Diakoptics算法中的时域模技术

苏东林, 吕善伟, 张其善   

  1. 北京航空航天大学 电子工程系
  • 收稿日期:1998-11-17 出版日期:2000-03-31 发布日期:2010-09-27
  • 作者简介:苏东林(1960-),女,北京人,教授,100083,北京.

Modal Technique in Time Domain for the FDTD-Diakoptics

SU Dong-lin, Lü Shan-wei, ZHANG Qi-shan   

  1. Beijing University of Aeronautics and Astronautics,Dept. of Electronic Engineering
  • Received:1998-11-17 Online:2000-03-31 Published:2010-09-27

摘要: 通过采用时域模技术,FDTD-Diakoptics算法可以用来有效准确地分析复杂的微波集成电路.根据电路的几何结构选定时域模函数,以该时域模函数为基础,建立微波电路的多模电路模型,使用全波时域分析方法求解多模电路对应于各个时域模的时域响应,使用傅里叶变换技术计算时域模函数的冲击响应,从而进一步得到多端口网络模型,使用FDTD-Diakoptics算法对微波电路进行分析.讨论了全波时域方法求解时域模函数时域响应时激励函数的选取原则,讨论了用傅里叶反变换求解时域模函数冲击响应时频带宽度的选取问题.最后本方法被应用于波导滤波器的分析设计.

Abstract: A modal technique in time domain for the FDTD-Diakoptics is proposed. Based on modal functions in time domain, which are formed according to geometries of structures, a microwave circuit is equivalent to a multi-mode circuit. Full-wave analysis method is used to get the time domain responses ofthe multi-mode circuit. Then Fourier transfer technique is employed to obtain the impulse responses. The multi-mode circuit is equivalent to a multi-port circuit and the FDTD-Diakoptics is applied to analyze whole circuit. In this paper, some rules about the excitation of full-wave analysis are given and also the bandwidth for inverse Fourier transfer in calculating impulse responses of time-domain modes are discussed. Finally the approach is verified by a waveguide bandpass filter. The results show good agreements with FDTD results.

中图分类号: 


版权所有 © 《北京航空航天大学学报》编辑部
通讯地址:北京市海淀区学院路37号 北京航空航天大学学报编辑部 邮编:100191 E-mail:jbuaa@buaa.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发