Efficient evaluation of the half‐space Green's function for fast‐multipole scattering models

There has recently been significant interest in the method‐of‐moments (MoM) and fast multipole method (FMM) for the analysis of scattering from targets in the presence of a lossy dielectric half space (soil). It is desirable to make the analysis of scattering from such a target consistent with use of the free‐space Green's function, to exploit previously developed free‐space scattering models, and for compatibility with the FMM. In this paper, we present a new and simple formulation for Green's‐function evaluation, which is shown to yield efficient and highly accurate scattering results. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 29: 388–392, 2001.