Fast Solution of Electromagnetic Scattering From Thin Dielectric Coated PEC by MLFMA and Successive Overrelaxation Iterative Technique

To speed up solution of electromagnetic scattering from 3-D conducting structures coated by thin dielectric material, the multilevel fast multipole algorithm and successive overrelaxation iterative technique are applied into the thin dielectric sheet (TDS) model. Based on the TDS model, only the induced current density on the surface of the conducting structure is required. By adding unitary operator for unknown current on both sides of the electric field integral equation, a successive overrelaxation iteration is constructed. The total computational expense is reduced greatly while reasonable accuracy is maintained. Numerical results demonstrate the validity and efficiency of the present method.