A numerical scheme to obtain the RCS of three-dimensional bodies ofresonant size using the conjugate gradient method and the fast Fouriertransform |
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Authors: | Catedra MF Gago E Nuno L |
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Affiliation: | Grupo de Radiacion, Univ. Politecnica de Madrid ; |
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Abstract: | A numerical scheme to obtain radar cross section (RCS) of three-dimensional bodies of resonant size (BRS) with arbitrary geometry and material composition is described. The RCS is obtained by solving the electric-field integral equation (EFIE) using the conjugate gradient-fast Fourier transform method (CG-FFT). The choice of a suitable set of basis and testing functions to discretize the EFIE leads to a very accurate and computationaly efficient CG-FFT procedure. This accuracy is checked by comparison with RCS measurements or predictions by other methods. As compared to the moment method, this CG-FFT scheme avoids the storage of large matrices and reduces the computer time by orders of magnitude |
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