An application of the method of moments for computation of RCS of PEC wire-grid models of complicated objects

An approach is described for the computation of the radar cross section (RCS) of a perfect electric conductor (PEC) wire-grid models of objects in the resonance domain based on the method of moments (a Galerkin method). Despite the achievements in the area of backscattering with more sophisticated methods, attention is also paid for practical reasons on this clear and simple approach and model introduced by Richmond (1966). A numerical solution of the problem is given based on pulse basis functions and point matching. One approximation for the self impedance is derived and its accuracy is estimated. Computational results for RCS of canonical wire-grid models of targets are included