Analysis of EM scattering from electrically large target over 2-D sea surface

The mechanism of composite scattering from complex electrically large target over the two-dimensional (2-D) randomly rough sea surface is researched based on the modified ldquofour-path modelrdquo. Kirchhoff approximation and the method of equivalent edge currents are applied to analyze the backscattering of the sea model generated with the Monte Carlo method and the electrically large target respectively. The issue of the coupling field between the target and the sea surface is solved with the principle of image. A model of the composite scattering from the complex target over the sea surface is proposed to analyze the affects of sea background to the scattering characteristics of the target. The EM scattering characteristics of the electrically large target in the sea clutter background is discussed with the numerical results.