[EMC]An Efficient Multiregion Model for Electromagnetic Scattering and Radiation by PEC Targets

Abstract—An efficient multiregion model has been proposed 3M[d6@a  
for the fast implementation of the electromagnetic scattering by V.Lk70 \  
perfectly electrical conducting (PEC) targets and the radiation of `tHF}  
point sources or wire antennas near PEC targets. In the multiregion b4KNIP7E  
model, the PEC target under consideration is divided by multiple 9ygNJX'~  
regions depending on the position of point source/antenna or _q-k1$o
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the incident direction of plane waves. Then the method of moments {RsdI=%  
(MoM) is used on the first region, which is close to the source or is i[33u p  
the illuminated region, to obtain the accurate electric current. The XI ><;#  
mutual coupling between different regions are considered approximately u[wDOw  
based on the magnetic-field integral equation, from which E'+z.~+  
closed-form approximations for electric currents on other regions d"ZsOq10D  
are derived. Because MoM is only performed on the first region, ]U4C2}u  
the number of unknowns in the new model is much fewer than T9}dgf  
that in the full MoM analysis, making the new model much more vXdI)Sx[  
efficient. Compared with the published hybrid methods, the multiregion ZLP0SCkuR  
model gives a more reasonable physical explanation, and ;L],i<F  
provides a better accuracy in both currents and scattered fields. 8&x&Ou$("V  
Numerical simulations for two-dimensional (2-D) prob .. n*AN/LB
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