The Born Approximation Algorithm Of Three-dimensional Electromagnetic Scattering In Anisotropic Medium

In this paper, the Born approximation method is studied and established to simulate the three-dimensional(3-D) electromagnetic(EM) scattering problem in the anisotropic medium. Comparing with the strict integral equation method, the Born approximation method applies the iterative method to avoid large linear system’s solving, therefore the Born approximation achieves a better computation efficiency and accuracy in simulating the3-D EM scattering problem.In view of the fact that at present the Born approximation method is merely applied to solve the EM scattering problem in the isotropic medium, in this paper, the Born approximation method is applied in the EM scattering model that an arbitrary uniaxial anisotropy scattering object exists in the transversely isotropic background medium. In order to improve the calculation accuracy, the higher-order generalized extended Born approximation(Ho-GEBA) method is introduced, and the compression operator based on the iterative dissipation principle is used to improve the convergence of high order expansion. Finally, numerical results validate the Ho-GEBA method by comparing with the strict integral equation method and traditional Born approximation method. In addition, we also systematically investigate and analyze the parameter variation effects on EM field, such as the anisotropy of medium, the size and location of the scattering object and the frequency.