Radar Scattering Cross-section Algorithm And Application

Focused on computation of radar cross section (RCS), two methods, i.e. the faceting approach and graphical electromagnetic computing (GRECO), using physical optics (PO) method and method of equivalent currents (MEC), are discussed starting with the concept of RCS and the basic theory of electromagnetic scattering. Two kinds of corresponding model of target are discussed in detail. One is the grid model used in the faceting approach while the other is the parametric surface model used in GRECO. The steps to translate the source shape data of targets to the data for RCS computing are introduced in addition.Facet division and its approximation as well as shading algorithm are discussed on faceting approach. Furthermore, the method of components decomposing is provided to handle extremely complex targets. Computational examples of actual targets by faceting approach demonstrate its validity in practical application.As for GRECO, several researches have been done, such as obtaining the six-dimension geometric information for computation from the target image at the computer screen and the techniques for speeding up the computation.At last, an effort is made to provide an integral solution for targets design, in which targets can be designed mutually from shape to RCS prediction. The details of this solution are discussed in this paper. And elementary achievement is gained by integrating GRECO into CAD software package of modeling.