Results with a Hybrid FE-BI Solver for Coaxial Cable Coupling Analysis

Paper in proceeding, 2025

Undesirable electromagnetic (EM) field coupling into shielded cables is an important consideration when assessing electromagnetic compatibility (EMC) of high-frequency EM engineering systems. To mitigate such effects, the capability to accurately model cable coupling is vital. This paper considers applying the full-wave hybrid finite element-boundary integral (FE-BI) method to coaxial cable coupling analysis. Recently proposed wire macro basis functions (MBFs) are used instead of standard basis functions, for representing the shield current in the BI part, with much reduced degrees of freedom. The results demonstrate that for the simple test cases considered, the MBFs yield just as accurate results as the standard basis functions, while reducing the required memory dramatically. This is a promising result, as such computational efficiency improvements are important toward full-wave analysis of challenging real-world cable coupling scenarios.