Hybrid technique of fast computing RCS with Inagaki modes

The hybrid technique to integrate the Inagaki modes with the general asymptotic waveform evaluation(GAWE) is proposed for computing the radar cross section(RCS) of a perfect electric conductor(PEC). In the analysis, the orthogonality and completeness of the Inagaki modes are used to construct the solution space of a matrix equation. Hence, the solution of the equation can be obtained by combining the basedvectors of the solution space with a set of coefficients, which can be determined by the GAWE technique at a given frequency. The results of numerical examples verify that the novel technique is effective in computing RCS.