A Fast Integral Equation-Based Method for Solving Electromagnetic Inverse Scattering Problems With Inhomogeneous Background

A family of difference integral equations (IEs), consisting of difference Lippmann-Schwinger IE and difference new IE (D-NIE), are proposed to solve the electromagnetic inverse scattering problems (ISPs) with inhomogeneous background medium bounded in a finite domain. Without resorting to Green's function for an inhomogeneous background medium, in the frame of the difference IE methods, Green's fu...