A Thin Dielectric Approximation for Calculation of Electromagnetic Scattering from 3-D Homogeneous Chiral Bodies

The full current thin dielectric sheet (TDS) approximation is considered for the problem of electromagnetic (EM) scattering by a three-dimensional (3-D) homogeneous thin chiral dielectric sheet. This approximation leads to surface integral equations (SIE) instead of the traditional volume integral equations (VIE). The surface of the thin dielectric region is modeled by triangle cells. Consequently, the number of unknowns is reduced by only surface meshes being utilized to discretize the dielectric geometry. Modified Rao-Wilson-Glisson (RWG) and pulse functions simultaneously for basis and testing functions are employed to approximate the tangential and normal currents in the dielectric layer. Then these SIEs are solved numerically using the conventional method of moments (MoM). The results by this approach show agreement with other methods while it greatly reduces the number of unknowns.