Forward-backward method for scattering from dielectric rough surfaces

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).

[1]  D. Holliday,et al.  Forward-backward: a new method for computing low-grazing angle scattering , 1996 .

[2]  L. Landesa,et al.  The generalized forward-backward method for analyzing the scattering from targets on ocean-like rough surfaces , 1999, IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010).

[3]  A. Fung,et al.  Numerical computation of scattering from a perfectly conducting random surface , 1978 .

[4]  D. Thompson,et al.  Application of iterative moment-method solutions to ocean surface radar scattering , 1998 .

[5]  G. Brown,et al.  A new numerical method for rough-surface scattering calculations , 1996 .

[6]  G. Franceschetti,et al.  Scattering from natural rough surfaces modeled by fractional Brownian motion two-dimensional processes , 1999 .

[7]  Leung Tsang,et al.  Monte Carlo simulations of large-scale one-dimensional random rough-surface scattering at near-grazing incidence: Penetrable case , 1998 .

[8]  D. Holliday,et al.  Forward-backward method for scattering from imperfect conductors , 1998 .

[9]  Joel T. Johnson,et al.  A novel acceleration algorithm for the computation of scattering from rough surfaces with the forward‐backward method , 1998 .

[10]  Daniele Riccio,et al.  Fractal Models for Scattering from Natural Surfaces , 2002 .

[11]  M. F. Chen,et al.  Computer simulation of wave scattering from a dielectric random surface in two dimensions: cylindrical case , 1990 .

[12]  Giorgio Franceschetti,et al.  Scattering from dielectric random fractal surfaces via method of moments , 2000, IEEE Trans. Geosci. Remote. Sens..

[13]  Leung Tsang,et al.  Monte-Carlo simulations of large-scale problems of random rough surface scattering and applications to grazing incidence with the BMIA/canonical grid method , 1995 .

[14]  Joel T. Johnson,et al.  Formulation of forward-backward method using novel spectral acceleration for the modeling of scattering from impedance rough surfaces , 2000, IEEE Trans. Geosci. Remote. Sens..

[15]  Giorgio Franceschetti,et al.  Fractals and the small perturbation scattering model , 1999 .