Abstract:

As a key step of characteristic basis function method (CBFM), the construction of characteristic basis functions (CBFs) is an extremely timeconsuming procedure, in which the method of moment (MoM) is applied on the subblock. To reduce the CPU time consumption of the scattering computation for electrically large target, a fast CBFs construction method based on highfrequency approximation is presented. In this method, the equivalent edge currents (EEC) method is introduced to deal with the edge diffraction, which can evidently improve the computation precision of scattering by target with edge structure. The accuracy and efficiency of this method are verified by the numerical results.