Characterization of Electromagnetic Scattering From Water-Depth-Changed Nearshore Sea Surface

Abstract

A novel type of sea surface taking the influence of changed water depth toward the shore into account is presented based on the newly proposed depth-limited spectrum, and characterization of electromagnetic (EM) scattering from such nearshore shallow sea surface is performed by using the second-order small-slope approximation theory (SSA-II), which is proved to be suitable for studying EM scattering from electrically large dynamic sea surface. A deep-sea surface model is applied to verify the SSA-II model by comparing to exact numerical solution. Then, the coherent and incoherent components of bistatic scattering from water-depth-changed sea surface are evaluated, and relevant numerical results for deep sea and shallow sea with constant water depth are both included to contrastively show the scattering characteristics of sea waves in depth-changed marine environment.