| The electromagnetic (EM) scattering from one-dimensional Gaussian roughsurface was calculated using GPU acceleration method based on the method ofmoments (MoM) in this paper. The acceleration results of the conducting roughsurface and dielectric rough surface are presended respectively. The change trend ofthe speedup with the number of unknowns is given when calculating theelectromagnetic scattering from conducting rough surface, and the speedup canincrease to about700for the large number of unknowns. The relationship betweenspeedup and incident angle is given for the case of low grazing angle incidence. Therelationship between speedup, also the number of unknowns, correlation length androot mean square height are presented respectively. It is found that the speedup ofscattering form dielectric rough surface can only increase to100~150, and also rougherof surface, the larger of the speedup. The properties of electromagnetic scattering froma multi-layered rough surface have been investigated through the method of moments(MoM). The validity of the presented method in this paper has been shown throughcomparing with finite difference time domain (FDTD). The versatility of the presentedmethod has been demonstrated by degenerating the three-layered rough interfaces to asigle-layered rough interface and then comparing with the exit scattering model, whichis a simple sigle-layered rough interface. Finally, the influences of the characteristicparamenters, such as incident angle, relative permittivity of the medium, root meansquare height and correlation length, as well as the height of each rough surface on thescattering coefficient are dicussed in detail. |
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