开放微带不连续电路的三端口网络描述

Desriptions of Discontinuity of An Opened Microstrip Circuits by Three ports Electric Network

给出了开放微带不连续电路的三端口网络描述。将微带电路向空间的辐射作为一个端口来处理，成功地消除了由于忽略电路的空间辐射效应引入的电路数字模拟误差。利用时域有限差分法（ＦＤＴＤ）一次运算就可得出三端口网络的Ｓ参数矩阵的各元素，而无需任何预处理，大大地节省了ＣＰＵ时间。实际计算与已发表的数据吻合得很好，表明文中给出的三端口定义是合理有效的。此三端口微带电路的定义可容易地推广到其他非屏蔽传输线电路的分析，可广泛用于电磁兼容分析、微带天线及其他开放传输线电路的ＣＡＤ技术中。

An opened microstrip circuit is described imploying a three ports electric network in this paper.The errors caused by omiting of electromagnetic radiations of opened microstrip in numerical simulating of microstrip circuits is eliminated successfully by making one circuit port of the radiation.No priori procedure is needed,and the S parameters of the three ports circuit are calculated from a single run of FDTD,which leads to a significant reduction in CPU time.A good agreement is found between the example and the data published,which shows that the definition of three ports network used to describe the opened microstrip circuit is reasonable and effective.The definition can be widely used in the analysis of unshielded transmission,electromagnetic compatibility,microstrip antenna and CAD of opened transmission line circuits.