Electric field radiated by a cross form grounded electrode

In this paper, a formalism that constitutes an alternative to the utilization of all numeric solving whose concept is based on Maxwell's equations has been proposed. In order to become liberated from all heaviness and constraints of the numeric utilization, we propose to process the problem of transient radiation of the earth by a numeric-analytic hybrid approach that we achieve in two stages. The first stage consists on solving the lines equations numerically by FDTD for the determination of the necessary current distribution in order to calculate the emitted electric field. In second stage, we achieve the same work analytically while using the dipoles method together with the modified images one.