Hybrid method for transient electromagnetic scattering from multiple targets above the rough sea surface

Abstract

In order to improve the calculation efficiency of the time-domain algorithm, a time-domain hybrid algorithm combining the time-domain integral equation (TDIE) with the time-domain Kirchhoff approximation (TDKA) is proposed to solve composite electromagnetic scattering from multiple targets above the one-dimensional conducting rough sea surface. In the hybrid method, the scattering of every target and the coupling scattering between them are accurately calculated by the TDIE method, and transient scattering from the sea surface can be estimated very well by the TDKA method. Taking into account the interactions between TDKA region and TDIE region, a time-domain matrix equation is given and used to solve the transient composite electromagnetic scattering from multiple targets above the rough sea surface. Compared with the conventional TDIE method, the hybrid method has a high computational efficiency and good calculation accuracy.