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Novel 2-D Time Domain Electric Field Integral Equations (TD-EFIE) are established in order to predict transient response of a wire enclosed within a rectangular cavity. The wire and cavity are excited by an external incident transient electromagnetic wave through a slot in the cavity wall. The formulation of the TD-EFIE is based on equivalence principle and boundary conditions taking account the effect of reflection from cavity walls. The equations are efficiently solved by Method of Moments. The transient unknown coefficients of the electric current at the wire and magnetic current at the slot are approximated using a set of orthonormal temporal basis functions derived from Laguerre Polynomials. The analysis demonstration is presented to prove that the novel TD-EFIE combined to MoM is able to solve this critical problem. No late-time instability is encountered.

progress in electromagnetics research m. pier m

TRANSIENT ANALYSIS OF A RECTANGULAR CAVITY CONTAINING AN INTERIOR SCATTERER USING TD-EFIE WITH WEIGHTED LAGUERRE POLYNOMIALS AS TEMPORAL BASIS FUNCTIONS