Scattering of complex target within complex environment

This paper presents an RCS prediction system for calculating high-frequency electromagnetic scattering from complex target within complex environment. The scattering body is described by computer-aided-design (CAD) representations in which the complex body is modeled as NURBS surfaces (Non-Uniform Rational B-spline). The complex environment (rough surface of sea or ground) is also carefully considered by using fractal function. Scattering fields are calculated by using physical optics (PO) and the equivalent currents methods (MEC). There is a good agreement between the present results and that from measurements which demonstrates the accuracy of this system.