Modeling the near-field coupling of EMC filter components

EMC filters are increasingly integrated into power applications. To improve the filter performance it is important to model the electromagnetic interference between components to optimize their positions. In this paper, a method is proposed to construct the equivalent model of the filter components. The proposed method proposed is based on the multipolar expansion by representing the radiation emission of generic structures in a spherical reference (r, θ, φ). These models of the sources will be used to compute the mutual inductance between the components according to their layout.