Title :
Application of Analytical Expressions for Retarded-Time Potentials in Analyzing the Transient Scattering by Dielectric Objects
Author :
Xuezhe Tian ; Gaobiao Xiao ; Shang Xiang
Author_Institution :
Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
Application of analytical formulas for the retarded-time potentials in Müller- and PMCHWT-type time-domain integral equations (TDIEs) is presented. The impulsively excited scalar and vector potentials are evaluated in closed form, and the coupling coefficients can be calculated with high accuracy. Examples of transient analysis of the electromagnetic scattering from dielectric objects are provided and solved with marching-on-in-time (MOT) method. Numerical results show that solutions for Müller-type MOT TDIE are always stable if the coupling coefficients are accurately evaluated, while the PMCHWT type usually suffers from the dc instability.
Keywords :
electromagnetic wave scattering; integral equations; time-domain analysis; MOT method; Müller-type MOT TDIE; PMCHWT-type time-domain integral equation; dielectric objects; electromagnetic scattering; marching-on-in-time method; retarded-time potentials; scalar potentials; transient scattering analysis; vector potentials; Antennas; Dielectrics; Equations; Integral equations; Time-domain analysis; Transient analysis; Vectors; Müller equation; Marching-on-in-time (MOT); PMCHWT; time-domain integral equation; transient electromagnetic scattering;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2336471
