Circuit models for 3D structures with incident fields

Abstract

Two dimensional transmission lines excited by external electromagnetic fields have been traditionally modeled by transmission line type circuit models with additional current and voltage sources to include the coupling from incident fields. These models accurately describe the situation where the physical structures are suitable for these quasi-two dimensional models. In this paper, a comparison of results for a two conductor transmission line model is made with a new partial element equivalent model (PEEC) which has been formulated to solve the scattering problem. The PEEC model corresponds to a full wave method of moments (MoM) solution. Advantage of the PEEC model are numerous since it can be coupled with other circuit simulation tools. For the two wire problem, the PEEC solution includes both the common as well as the differential mode currents. This compares with the transmission line model which provides only the differential mode current.