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A numerical scheme to obtain the RCS of three-dimensional bodies of resonant size using the conjugate gradient method and the fast Fourier transform

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3 Author(s)
Catedra, M.F. ; Grupo de Radiacion, Univ. Politecnica de Madrid, Spain ; Gago, Emilio ; Nuno, L.

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

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:37 ,  Issue: 5 )

Date of Publication:

May 1989

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