[天线]A novel scheme for the solution of the time-domain integral equations of electromagnetics

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 52, NO. 1, JANUARY 2004 283 ] X]!xvN@  
A Novel Scheme for the Solution of the Time-Domain 'CqAjlj  
Integral Equations of Electromagnetics RDQ]_wsyKG  
Daniel S.Weile, Member, IEEE, Greeshma Pisharody, Student Member, IEEE, Nan-Wei Chen, Student Member, IEEE, Dn#5H{D-d  
Balasubramaniam Shanker, Senior Member, IEEE, and Eric Michielssen, Fellow, IEEE x7l}u`N4  
Abstract—A new method to numerically solve time-domain tQ'R(H`  
integral equations pertinent to electromagnetic surface scattering 3kGg;z6  
phenomena is presented. The method uses approximate prolate /M]P&Zb |  
spheroidal wave functions and standard Rao–Wilton–Glisson lc fAb@}2  
basis functions to effect the temporal and spatial discretization n 78!]O  
of the integral equations, respectively. Because the temporal U$a)lcJd  
basis functions are noncausal, an extrapolation scheme is used to p*cyW l  
construct a system of equations that can be solved by marching MxGQM>  
on in time. Numerical results show that the proposed method is PPpaH!(D  
stable and that its solutions converge exponentially fast with the &l{ctP%q  
time-bandwidth product of the approximate prolate spheroidal E)I&? <g  
wave functions to results from a frequency-domain met .. xk8NX-:  
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