Scattering from a composite body of revolution with fast inhomogeneous plane wave algorithm

Abstract

The electromagnetic radiation and scattering from a body of revolution (BOR) of arbitrary shape have been widely discussed during several decades. The objects can contain perfect electric conductor (PEC), homogeneous dielectric bodies, coated conducting bodies and combined dielectric and conducting bodies [1][2]. The traditional method used to solve BOR with integral equations is the Method of Moments (MoM). And the computational time consumed in solving the integral equation of the BOR problem depends on the evaluation of modal Green's function (MGF), which is a time consuming process. Some research has been done to reduce this computational complexity. For example, Abdelmageed used spherical Bessel function to expansion to evaluate the MGF [3]. In this work, we extend the fast inhomogeneous plane wave algorithm (FIPWA) [4][5] to accelerate the computation of the MoM for composite homogeneous dielectric and conducting bodies of revolution. PMCHW [6] (Poggio-Miller-Chang-Harrington-Wu) equations and electric field integral equation are used for solving the homogeneous dielectric and conducting objects, respectively. Both the memory requirement and CPU time are reduced for large-scale BOR problems. Numerical results are given to demonstrate the validity and efficiency of the FIPWA.