The asymptotic waveform evaluation (AWE) is an efficient method for analyzing wideband electromagnetic scattering problems.As the number of unknowns increases,the size of MOM impedance matrix grows very rapidly,so it is a prohibitive task for the computation of wideband radar cross section (RCS) from electrically large objects or multi-objects using the traditional AWE technique.The characteristic basis function method (CBFM) is a novel efficient approach for reducing the matrix size to a manageable size for direct matrix inversion.In this paper,the AWE technique based on the CBFM for analyzing electromagnetic scattering from multi-objects over a given frequency band is proposed.Numerical examples are given to illustrate the accuracy and computational efficiency of the proposed method.
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