LAUSR

The method of moments (MOM) is applied to solve electromagnetic (EM) scattering problems in spherically multilayered media. A spectral-domain dyadic Green’s function (DGF) in a spherically multilayered medium is constructed in terms of the spherical vector wave functions by using the method of scattering superposition in the spherical coordinate system. Its expression is later transformed to that in the Cartesian coordinate. We discretize the computational domain which contains the scatterer into N size-independent cells in the Cartesian coordinate. Based on the transformed DGFs, the volume integral equations can be solved by MOM combined with Krylov subspace iterative methods. In this letter, we choose the bi-conjugate gradient stabilized (BCGS) iteration method due to its fast convergence. Numerical results compared with FDTD solutions from a commercial software are presented to validate the accuracy and efficiency of our method. VC 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:526–530, 2017; View this article online at wileyonlinelibrary.com. DOI 10.1002/ mop.30335