Abstract

This paper presents the hybridization of the multi-conductor transmission line (MTL) approach and method of moments (MoM) for solving automotive low-frequency (LF) EMC radiation and susceptibility problems. The hybrid solution is performed in two steps. When radiation problems are considered, the MTL solution is performed as a first step and then radiation from the MTL system is used as an excitation for a 3D LF-MoM model; for susceptibility problems, fields radiated from the 3D system are calculated using LF-MoM approach and then these fields are used as incident fields for the MTL solution. Our proposed LF MoM solution is unique in its formulation of loop-star approach for solenoidal and non-solenoidal equivalent currents applied to special boundary conditions for thin 3D sheets, characterized by both electric and magnetic material parameters. For modeling of multiconductor cable systems, efficient circuit model is implemented. The model considers shielding, losses, proximity, and skin effects. The hybrid solution is validated using full-wave MoM solution. The applicability of the described approach is demonstrated using magnetic fields generated by a shielded cable inside a car and electromagnetic coupling from an inductive charger to the shielded cable.

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