An Efficient Integral Equation Method for Full-wave Analysis of Inhomogeneous Electromagnetic Surfaces with Connected Conductors

TL;DR

This paper introduces a novel integral equation method for efficient full-wave analysis of complex inhomogeneous electromagnetic surfaces with connected conductors, improving accuracy and computational efficiency.

Contribution

A new macromodeling approach using half Rao-Wilton-Glisson basis functions is proposed to handle connected conductors and multiscale structures in EM surfaces.

Findings

Validated accuracy against commercial solvers

Effective handling of conductor intersections

Improved simulation efficiency

Abstract

In this paper, a generalized macromodeling approach is presented to simulate complex electromagnetic (EM) surfaces consisting of unit cells with connected conductors. Macromodels of each unit cell are produced by applying the equivalence principle on fictitious surfaces encapsulating them. Unit cells often consist of multiple dielectric layers and conductor traces, featuring multiscale structures. Challenges arise when a current-carrying conductor trace traverses the fictitious surface. Hence, a new method based on half Rao-Wilton-Glisson basis functions is proposed to accurately ensure the continuity of the surface currents and avoid singularities at the intersections. The accuracy of the proposed approach is validated by comparing the results with commercial solvers for different EM surfaces.