HYBRID TDIE-TDPO METHOD FOR STUDYING ON TRANSIENT RESPONSES OF SOME WIRE AND SURFACE STRUCTURES ILLUMINATED BY AN ELECTROMAGNETIC PULSE

An efficient hybrid method, based on time-domain integral equation (TDIE) and time-domain physical optics (TDPO), is proposed for studying on transient electromagnetic responses of some wire and surface structures illuminated by an electromagnetic pulse (EMP), respectively. Two groups of triangular-type basis functions are used to expand the currents on both of them. The derived hybrid TDIE-TDPO equations are solved by marching-on-in-time (MOT) scheme. In comparison with the full TDIE-based MOT method, computational complexity of our developed method is reduced significantly, and at the same time, with high accuracy maintained. Numerical results of EMP responses of some typical wire and surface structures are presented to demonstrate its versatility, accuracy and efficiency, with proximity effects between them captured and discussed.