Application of rational function approximation technique to hybrid FE/BI/MLFMA for 3D scattering
In this article, the rational function approximation technique (RFAT) is applied to the hybrid finite-element/boundary-integral/multilevel fast multipole algorithm (FE/Bl/MLFMA) to acquire wide-band and wide-angle backscatter radar-cross-section (RCS) by complex targets. The two approaches of using the rational function approximation technique, asymptotic waveform evaluation (AWE) and model-based parameter estimation (MBPE), both have been investigated and compared by theoretical analysis and numerical experiments. The numerical results acquired by the developed computing algorithm of integrating the hybrid FE/BI/MLFMA with the RFAT are presented in the article, demonstrating that the rational function approximation technique can greatly speed up the hybrid FE/Bl/MLFMA to acquire wide-band and wide-angle backscatter RCS by complex targets. (c) 2007 Wiley Periodicals, Inc.
rational function approximation hybrid fe/bi/mlfma asymptotic waveform evaluation (awe) model-based parameter estimation (mbpe) electromagnetic scattering