[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 7OC,KgJ3  
A Novel Scheme for the Solution of the Time-Domain xiA9X]FB  
Integral Equations of Electromagnetics u^ngD64  
Daniel S.Weile, Member, IEEE, Greeshma Pisharody, Student Member, IEEE, Nan-Wei Chen, Student Member, IEEE, ]7dm`XV  
Balasubramaniam Shanker, Senior Member, IEEE, and Eric Michielssen, Fellow, IEEE =B<g_9d4  
Abstract—A new method to numerically solve time-domain w:MfaN*  
integral equations pertinent to electromagnetic surface scattering `jP\*k`~]  
phenomena is presented. The method uses approximate prolate l<7 b  
spheroidal wave functions and standard Rao–Wilton–Glisson F P mLost  
basis functions to effect the temporal and spatial discretization C+y:<oo)  
of the integral equations, respectively. Because the temporal G;fP  
basis functions are noncausal, an extrapolation scheme is used to 4^AE;= Q  
construct a system of equations that can be solved by marching +` Em&  
on in time. Numerical results show that the proposed method is $G*$j!  
stable and that its solutions converge exponentially fast with the 2

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time-bandwidth product of the approximate prolate spheroidal Z"e|DP`  
wave functions to results from a frequency-domain met .. g%4|vA8  
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