Application of DCIM to MPIE-MoM analysis of 3-D PEC objects in multilayered media

Abstract

The Formulation-C Green's functions for multilayered media are reformulated in this paper to extract z-dependent part when the source and observation points are in different layers. Discrete complex image method (DCIM), is applied to obtain complex images independent on z but dependent on z′. For simulation of three-dimensional (3-D) perfectly electrical conduction (PEC) objects penetrating two or more layers, tables of complex images are built in a z′-grid. During the matrix-filling stage of mixed-potential integral equation, together with method of moments (MPIE-MoM), the spatial-domain Green's functions are interpolated from values in the z′-grid, while these values are calculated from complex images in the z′ grid. This interpolation scheme is more efficient than those directly storing the spatial-domain Green's functions. Numerical examples are given for analyzing a dipole in a two-layered media.