A New Integro-Differential Equation for the Time-Domain Analysis of Thin-Wire Structures

A simplified way of calculating in the time domain the response of thin-wire structures excited by an arbitrary electric field is put forward. The results obtained for straight and ring antennas and scatterers excited by a gaussian pulse are shown. Introduction. The short-pulse transient response of a scatterer or an antenna can be obtained by resolving the problem directly in the time do­ main [1J-L5]. The integro-differential equation of the electric field E is normally used for the numeri­ cal analysis of wires and open structures [ 1 ], where E is a function of the current and charge densities [2] , [3] .An alternative form of the electric field created by an arbitrary charge and current distribution at a space-time point (r,t) is given by [6 ], [7].