Investigation of scattering characteristics for a conducting sphere moving at high velocity

Abstract

The scattered field of a conducting sphere moving at high velocity is investigated, when the incident wave is of arbitrary frequency. First the transformation of coordinates, transformation of vectors and the electromagnetic transformation are derived in detail, when one system of coordinates moves to another one along their Z-axis. The transformation of trigonometric function and that of the components of vector in spherical coordinates are presented for the first time. These transformations establish a theoretic bas is for studying the scattered field by a target moving in high

velocity.Utilizing the reference, the scattering characteristics of a conducting sphere moving in high velocity are investigated in detail. The expression of scattering section is obtained and simulations of that are presented. Results show that the forward scattered field is larger than that of the backward as the sphere moves at a high velocity. The forward and backward scattered fields are not much influenced by the operating frequency and the Doppler effect plays the main role. The second radiation on the surface of the target is mainly electric dipole radiation.