Premium
Electromagnetic scattering from inhomogeneous objects embedded in spherically multilayered media solved by the method of moments
Author(s) -
Chen Yongjin,
Han Feng,
Liu Na,
Wen Paiju,
Liu Qinghuo
Publication year - 2017
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30335
Subject(s) - discretization , cartesian coordinate system , method of moments (probability theory) , krylov subspace , mathematical analysis , scattering , coordinate system , spherical coordinate system , superposition principle , physics , conjugate gradient method , mathematics , integral equation , geometry , optics , algorithm , linear system , statistics , estimator
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. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:526–530, 2017