Determination by the BI-RME method of entire-domain basis functions for the analysis of microstrip circuits

In this paper, we present a novel approach for the numerical determination of entire-domain basis functions for the analysis of shielded microstrip circuits, composed of arbitrarily shaped metallic patches with an arbitrary number of ports. This approach is based on the solution of Helmholtz and Laplace equations in the metallic areas with proper boundary condition by the Boundary Integral-Resonant Mode Expansion (BI-RME) method. Two examples validate the proposed method.