有限元软件ANSYS在传输线特性阻抗计算中的应用

Application of Finite Element Software ANSYS to Calculate Characteristic Impedance of Transmission Line

具有复杂截面的传输线的特性阻抗计算一直是领域内的热点问题 ,尽管已有相关的解析解法 ,但是当截面形状不规则时 ,数值方法无疑是更好的选择。本文介绍了如何采用有限元方法 (FEM)计算均匀无耗传输线的特性阻抗 ,着重探讨了如何在大型通用有限元软件 AN SYS上实现传输线特性阻抗计算的数值模拟 ,并以一种 TEM传输室的设计计算为例 ,应用 A NSYS软件计算各段结构的截面特性阻抗 ,指导其各部分结构的确定 ,从而达到优化 TEM传输室各设计参数的目的。测试表明计算的结果与实传输线阻抗值相吻合 ,这种方法大大的方便了特性阻抗的确定并提高了特性阻抗计算的精度。

The calculation of characteristic impedance of transmission line with complicated section is a hot spot in field Although some analytic method is available, numeric method is a better choice when the section is very irregular This article presents how to calculate characteristic impedance of transmission line based on the Finite Element Method (FEM) The numerical simulation of characteristic impedance of transmission line, which is implemented by using ANSYS FEM software, is focused especially here Taking the design of a sort of TEM as example,The ANSYS FEM software is used to determine the dimension of section of the cell, in order to optimize the design parameters Subsequent testing inosculates with the result from ANSYS simulation The application indicates that the method have a good achievement for improving the design of TEM cell