计算传输线平均耦合截面积的一种高效全波方法

An efficient full-wave method for calculating mean coupling cross section of transmission line

摘要: 在功率平衡法的网络化公式应用中, 精确预知腔内装载物的耦合截面积是关键, 这通常依赖于混响室的实验测定.文中使用平面波角谱概念和蒙特卡罗方法来数值模拟混响室中的电磁环境, 在此基础上, 首次应用基于互易定理的快速全波分析方法提取了理想混响室内靠近理想导电地平面的多导体传输线的平均耦合截面积, 验证了方法的正确性, 并计算了单根裸线传输线、带包层传输线、双绞传输线、传输线附近有导体挡板以及多导体传输线端口的平均耦合截面积.该方法具有计算精度高、仿真速度快、适用范围广的特点.

Abstract: For applying EM topology theory and PWB to calculate the electromagnetic shielding effectiveness, the calculating of coupling cross section is the key, which is usually dependent on the measurements in reverberation chamber. This article uses the concept of angular spectrum of plane waves and Monte Carlo methods to simulate the electromagnetic environment of reverberation chamber, use a new fast method to extract the ideal reverberation chamber statistical parameters and mean coupling cross section of transmission line. The advantage of high accuracy and fast simulation speed and wide range of usage scenario of this method is proved through comparison with the references.