Wideband transient response of irregular conductive objects illuminated by a high-power EMP

This paper proposes a numerical method for solving time domain electric field integral equation (TD-EFIE) so as to capture the wideband transient surface current of irregular conductive objects. The methodology is based on curved triangle RWG (CRWG) basis function combined with Laguerre polynomials as temporal variation, instead of customary planar triangle RWG expansion with matching-on in time (MOT) scheme. Using the curved CRWG spatial basis function, arbitrary PEC geometry can be modeled more accurately than that of using conventional planar patches. Numerical examples for some typical metallic targets under the illumination of a high-power EMP show that our proposed method can get accurate EMP responses of different PEC objects but with fewer spatial unknowns.