An Efficient Preconditioning Approach of Surface Integral Solution of Scattering from Multilayer Dielectric Bodies

The computation of scattering from multilayer dielectric bodies is studied by using the combined tangential formulation (CTF) of surface integral solution. Different from homogeneous bodies, the formulation of multilayer dielectric bodies includes the interaction between equivalent currents on different interfaces. The previous preconditioners for solution of homogeneous bodies are not efficient any more or cannot be directly extended for solution of multilayer dielectric bodies. An efficient preconditioning scheme is designed in this paper for the surface integral solution of multilayer dielectric bodies. A numerical example verifies the accuracy and efficiency of this approach in dealing with multilayer dielectric problems.