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Forward-backward method for scattering from dielectric rough surfaces

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1 Author(s)
Iodice, Antonio ; Dipt. di Ingegneria Elettronica e delle Telecomunicazioni, Naples Univ., Italy

The iterative forward-backward (FB) method is a recently proposed efficient technique for numerical evaluation of scattering from perfectly conducting rough surfaces. Extension of the method to include scattering from imperfect conducting surfaces, with a high imaginary part of the complex dielectric constant, has also been proposed. The FB method is further generalized to analyze scattering from dielectric rough surfaces with arbitrary complex dielectric constant. Electric and magnetic equivalent surface currents are split into forward and backward components and equations governing these current components are obtained. As a solution, an iterative scheme is proposed and its convergence rate is analyzed. Finally, the effectiveness of the method is assessed by comparing the obtained scattering results with "exact" ones, computed by employing the usual method of moments (MoM).

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Antennas and Propagation, IEEE Transactions on  (Volume:50 ,  Issue: 7 )