[数值]Comparison of Integral-Equation Formulations for

Abstract—We consider fast and accurate solutions of scattering maQE Bi,  
problems involving increasingly large dielectric objects formulated ?Q1(L$-=  
by surface integral equations. We compare various formulations l<5O\?Vo]  
when the objects are discretized with Rao-Wilton-Glisson functions, M,@\*qlEJ  
and the resulting matrix equations are solved iteratively b:3n)-V{u  
by employing the multilevel fast multipole algorithm (MLFMA). RaT(^b(  
For large problems, we show that a combined-field formulation, Xr\|U89P  
namely, the electric and magnetic current combined-field integral "]J4BZD  
equation (JMCFIE), requires fewer iterations than other formulations S!Ue+jW  
within the context of MLFMA. In addition to its efficiency, dd1m~Gm  
JMCFIE is also more accurate than the normal formulations ofbNg_K>  
and becomes preferable, esp .. #k2&2W=x  
Cc*"cQe  

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Thanks a lot!!