Research On Multiple Scattering Of The Complex Targets

The computational research on the Radar Cross Section (RCS) of the complex targets plays an extremely significant role in the fields such as stealth and anti-stealth, radar recognition and counter-recognition. The accurate prediction of the RCS of complex target has always been an important research subject. The multiple scattering is one of the key problems that must be considered in this subject. The structure which has the multiple scattering characteristic is commonly the intensive scattering source of the target, and has great influence on the RCS of the target.This paper focuses on the research of the multiple scattering in the computation of the RCS of the complex target. The paper briefly relates the basic concept of the RCS and the development of the RCS computing theory, then gives the introduction of the fundamental principle and the computation method of the GRECO (Graphic Electromagnetic Computing). After the enumeration of some commonly used methods of the multiple scattering computation, there is a detailed specification of the new approach to the computation of the multiple scattering RCS of the complex target applied to the GRECO software.This approach is under the circumstance of the GRECO platform, utilizes the visualization character of the GRECO, and takes the pixel as the fundamental unit. Employing geometric optics and physical optics, the RCS computation of the complex target is achieved, after searching the pixel pairs which meet the criterion of the multiple scattering. The computing result of the models which is built with the AUTOCAD software indicates that the method has practical engineering value. Furthermore, the optimization of this approach is achieved by using some engineering approximation; the computational speed is also improved while ensuring the calculation precision.