Low-grazing angles scattering of electromagnetic waves from one-dimensional natural surfaces: Rigorous and approximate theories |
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Institution: | 1. Institut Fresnel, CNRS/Université Aix-Marseille, Domaine Universitaire de Saint-Jérôme, avenue Escadrille Normandie-Niémen, 13397 Marseille cedex 20, France;2. Pellenc Selective Technologies, 125, rue François Gernelle, BP 124, 84124 Perthuis cedex 4, France;3. LSEET CNRS/Université du Sud-Toulon Var, BP 20132, 83957 La Garde cedex, France |
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Abstract: | We present a rigorous model, based on a specific boundary integral formalism for the wave scattering from rough, one-dimensional, dielectric or conducting surfaces at low-grazing incidence and scattering angles. Even though this so-called Grazing Method of Moment is, from a numerical cost point of view, independent of the incidence, it remains very numerically demanding. We thus propose an extrapolation technique for faster monostatic diagram computation, based on the theoretical behavior of the scattering amplitude at low-grazing angles. This technique is compared to the GMoM and to some approximate models, for surfaces with Gaussian spectrum as well as for sea surface. |
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