Dipole model method for dielectric electromagnetic scattering analysis

This paper presents the dipole model method for the efficient analysis of electromagnetic scattering from the dielectric body. The proposed method is based on the conventional method of moments (MoM) associated with the Schaubert-Wilton-Glisson (SWG) basis function and the dielectric body is discretized into tetrahedral volume elements. In dielectric body, each SWG common face element containing two inner tetrahedrons or boundary face element containing one tetrahedron is viewed as a dipole model. The impedance matrix element is calculated by the dipole model method when the distance between the equivalent dipole element and the observation point is beyond a critical distance. The dipole model method can speed up the matrix impedance filling significantly and simplify the boundary condition treatment on the surface of dielectric body. Numerical results show its high-efficiency and nearly the same computational accuracy compared with conventional MoM. ©2009 by Editorial Department of Chinese Journal of Radio Science.