Research Timestepping Time Domain Integral Equation Decent And Quick Method

For a long time, frequency domain algorithm is the main computational method in computation electromagnetics. With the increasing range of engineering applications including high-resolution short time pulse radar, target identification and broadband signals modeling, a lot of attentions have been paid for the time domain method. The accuracy of conventional time domain method, such as FDTD, is limited, and can not satisfy the increasing need for high precision. In consideration of the fact that impedance matrix of frequency domain method changes with different frequency points and sweeping frequency is time-consuming, frequency domain methods are far from the actual demand. It is necessary to promote the development of time domain method. Due to the fact that Time Domain Integral Equation (TDIE) is simple and can analyze inhomogeneous object, therefore TDIE has good prospects.This paper introduces Marching-On-in-Time to analyze transient electromagnetic scattering of arbitrary composite structures comprising PEC and inhomogeneous dielectric materials. The equivalent electric dipole combined with EDIE is proposed to speed the computation and improve the efficiency of the MOT algorithm. Some numerical examples are given to validate the accuracy of proposed scheme. An effective way is proposed to analyze the transient electromagnetic scattering phenomenon, which is also a fundamental for the analysis of transient electromagnetic scattering from complex materials using the time domain integral method.