基于混合S参数法的微带线耦合效应研究

Investigation on Coupling Effect of Microstrip Line based on Hybrid S-parameters

摘要:

采用混合S参数法研究了入射波和集总电源共同激励下微带线的终端响应,对于微带线上的传输线模式波和天线模式波的计算采用了Galerkin积分方法,避免了采用广义函数束方法(GPOF)从仿真结果中提取信号的过程,从而简化了计算步骤,减少了计算时间；通过与电磁仿真软件HFSS仿真结果的比较,验证了该方法的正确性；并采用混合S参数方法计算了不同微带线参数对耦合效应的影响,研究表明,当微带线长度变长,宽度变宽,介质基板厚度变厚,介质基板相对介电常数变大时,耦合效应变强,其中耦合效应受长度影响最大。

Abstract:

A hybrid S-parameter is used to study the terminal response of microstrip line subject to arbitrary plane wave and port excitations. The forced wave and modal wave are calculated by Galerkin’s solution. Compared with traditional method GPOF, It greatly improve the computational efficiency. Correctness of this method is validated by the comparation with the full-wave simulate software HFSS. The influence of different parameters on the microstrip line terminal was investigated using the hybrid S-parameter method. The results show that, the coupling effects will be stronger when the microstrip line is longer, wider, thicker and the relative permittivity is biger, and the influence of longitude is strongest.