Abstract:

A new method, named fast dipole method (FDM) is presented to solve the volume integral equation(VIE) for electromagnetic scattering from three-dimensional (3D) inhomogeneous anisotropic dielectric targets, which is based on the equivalent dipole-moment method (EDM) and the Schaubert-Wilton-Glisson (SWG) basic function. The EDM speeds up the calculation of impedance elements, which views the SWG basic functions as dipole models, but it cannot save the time of solving matrix equation and memory requirement. Using a simple Taylor’s series, the FDM transforms the impedance element into an aggregation-translation-disaggregation form naturally, which accelerates the matrix vector products and saves memory. Simulation results demonstrate the efficiency and accuracy of this method.