Fast Solving Scattering From Multiple Bodies of Revolution With Arbitrarily Metallic-Dielectric Combinations

Abstract

The accurate simulation of multiple bodies of revolution (MBoRs) is of great importance in many areas of engineering applications. The beauty of a single body of revolution (BOR) is that the 3-D problem can be reduced to a series of decoupled 2-D problems thereby not consuming large computational memory and time. However, for a multiple arbitrarily orientated bodies of revolution scattering problem, the modal Green's function (MGF) does not work. In this paper, an approach based on domain decomposition framework MBoRs (DDM-MBoRs) is proposed to solve electromagnetic scattering from MBoRs involving metallic and dielectric objects. First of all, the induced electric or magnetic currents in each single BoR are efficiently solved by a fast inhomogeneous plane wave algorithm (FIPWA). Then BoRs couple with each other via the far-field Green's function. In particular, a modified basis function mapping technique (BFMT) is utilized to project the BoR basis functions to constant vector basis functions, which further makes it flexible to employ multilevel fast multipole algorithm (MLFMA) to accelerate the mutual coupling of each BoR. In the proposed framework, MBoRs with arbitrarily metallic-dielectric combinations can be efficiently solved. Several numerical results are illustrated to demonstrate the accuracy and efficiency of the proposed method.