Modeling of inhomogeneous and lossy components by the BI-RME method and the segmentation technique

A novel approach for the analysis of inhomogeneous and lossy microwave circuits is presented in this paper. The proposed technique rely on the segmentation of the structure into homogeneous boxed building blocks. The frequency behavior of each block is represented by a generalized admittance matrix relating the RWG basis functions adopted to expand the magnetic surface current on interconnection surfaces. The generalized admittance matrices are determined in the form of a pole-expansion by the Boundary Integral-Resonant Mode Expansion (BI-RME) method, adopting the Ewald technique to efficiently calculate the Green's function of the box. The frequency response of the whole component is obtained by cascading the admittance matrices of the building blocks. The analysis of two waveguide components is reported and discussed to demonstrate the accuracy of the proposed technique.