Solving electromagnetic scattering from 3D composite penetrable structure and PEC by the IE-FFT method

There are plenty of applications about electromagnetic scattering from three dimensional composite penetrable structure and PEC as analysis of novel antenna made of complicated material, specific absorption ratio (SAR) computation in biomedical area and so on. In this paper, hybrid volumetric integral equation and surface integral equation (VSIE) is used for efficient solution of electromagnetic scattering from 3D composite penetrable structures and PEC. In the SIE, the grid-robust higher order vector basis functions are used to reduce the number of unknowns. For penetrable structure, non-conformal VIE is adopted. The integral equation fast Fourier transformation (IE-FFT) method is applied to expedite matrix-vector multiplication in iteration process. Some numerical results are given to demonstrate the accuracy and efficiency of this method. As truly full non-conformal numerical method, the present method is potential for complicated, composite penetrable structure and PEC problems.