Analysis of Transient EM Scattering From Penetrable Objects by Time Domain Nonconformal VIE

A marching-on-in-time (MOT)-based nonconformal volume integral equation (VIE) is proposed to analyze the transient electromagnetic scattering from the inhomogeneous penetrable objects. The gradient-gradient operator is acted on the Green's function to realize the nonconformal tetrahedral meshes discretization. Half Schaubert-Wilton-Glisson (SWG) basis functions are chosen for the trail and test spatial functions, meanwhile the piecewise polynomial Lagrange interpolation functions are applied for temporal expansion. In addition, the quasi-explicit scheme is introduced to accelerate the calculation of conventional implicit MOT system. Numerical results are given to demonstrate the flexibility and validity of the proposed scheme.