一种求解单站RCS的高效算法

A Highly Efficient Algorithm for Solving Monostatic RCS ——The Method of Basic Waves Exciting

本文提出了一种新的求解单站 Ｒ Ｃ Ｓ的高效算法———基波激励法．该法首先选择一个基波函数系，并把其中各元素作为子激励场用以激励目标体使之产生对应的受激表面子电流，再对任意方向的入射场用上述基波函数展开而获得含有入射方向信息的展开系数，并证得该入射场所激励的表面电流就是各基波函数对应的受激表面子电流的加权迭加，权因子就是入射场的展开系数，从而可用所得表面电流求解对应的单站 Ｒ Ｃ Ｓ．在电大尺寸目标 Ｒ Ｃ Ｓ 分析中，相比传统方法，该方法具有计算效率高，节省计算机存储空间等优点．

A new highly efficient algorithm for solving monostatic RCS——Method of Basic Waves Exciting is presented.In this method,a basic wave functions set is selected at first.Using these basic waves of the set as the basic exciting fields of an object,we can calculate the subelectric currents on the object's surface excited by them.Then,an arbitrary directional incident field is expanded by these basic wave functions and the expansion coefficients are obtained.It is proved that the surface current excited by the incident field equals to the weighted sum of all of the sub electric currents excited by the basic wave functions,and the weighting factors are the expansion coefficients exactly.So,we can use the surface current obtained to solve the monostatic RCS of this object.In the RCS analysis of electrical large object,compared to traditional solvers,the method has advantages of higher efficiency in solving matrix equations and saving storage of computer etc.