Graphical Electromagnetic Computing for RCS of Large and Complex Object

摘要

In the national defense, it is very important to predict radar cross section (RCS) of large and complex radar targets in real-time. This paper presents a method of computing the RCS of complex targets and producing 1D high resolution image or 2D high resolution image in real-time in two forms. The method is based on high-frequency scattering theory and a 3D graphics computer, which we called “Graphical Electromagnetic Computing” (GRECO). First, a graphical-processing approach to an image of the targets on the computer screen is used to identify the surface and unit normal. Second, the high-frequency approximations to RCS prediction are used. According to different cases Physical Optics (PO) or Method of equivalent Currents (MEC) is used. Third, the CPU time for the RCS prediction is spent only on the electromagnetic part of the computation, so the RCS prediction results are in real-time. And it could display the results in the form of 2-D contour and 3-D views. Finally, the results show that the method is valid.