Efficient Analysis Of Scattering Characteristics Of Rotationally Symmetric Body

The problem of electromagnetic scattering from perfectly conducting bodies of revolution of arbitrary shape on half space is considered. At first, a set of electrical field Integral equations (EFIEs) are formulated via Maxwell's equations, potential function, equivalent principle, the boundary conditions, and computation the dyadic Green's function by use of complex image method. Secondly, with the rotational symmetry the unknown equivalent currents (electric currents and magnetic currents) can be expanded in Fourier series inφand sub sectional in t. Because each mode is orthogonal to the others, the problem can be solved under each mode respectively and each solution is summed up subsequently. After the equivalent currents are gotten, the far scattering field and radar cross section (RCS) are readily determined from the reciprocity theorem.In order to reduce the requirement of computer memory for the larger problems, the body of revolution's integral equation based overlapped domain decomposition method (BOR-IE-ODDM) is proposed. In this method, the surface of body of revolution is decomposed into several rotational symmetry sub-domains. Hence, the method of moment for the body of revolution (BOR-MOM) is still effective. This method combines the advantages of BOR-MOM and IE-ODDM, and the efficiency is demonstrated by the given results.This paper also considers plane wave scattering from both body of revolution and arbitrary surfaces, two bodies of revolutions. The analytical approach is based upon using EFIE to solve for currents on the combined BOR and arbitrary surface geometry. The EFIE is solved using the method of moments in a formulation, which by special provision for the BOR portion of the geometry, results in a system matrix with many null elements and a partial block diagonal form. This special form of the system matrix is responsible for the more computationally efficient solution.