Perturbation Analysis for Reflection From Two‐Dimensional Periodic Sea Waves

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Abstract
Reflection of a vertically polarized electromagnetic plane wave from a periodic rough surface is considered. The surface is characterized locally by a boundary impedance. By using a perturbation analysis, we obtained expressions for the spectral components of the reflected waves. It is shown that the results at grazing incidence lead to an effective surface impedance that is consistent with an earlier analysis by Rice (1950) for a perfectly conducting sinusoidal surface.

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