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Depolarization of EM waves by slightly rough surfaces

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1 Author(s)
G. Valenzuela ; The Johns Hopkins Univ., Silver Spring, MD, USA

Depolarization is obtained for the scattering of electromagnetic waves from a slightly rough surface using Rice's theory. In the plane of incidence, depolarization is a second-order effect. The results are applied to backscattering from a slightly rough sea using the Neumann spectrum for a fully developed sea. The expression for the depolarized scattered power is of the form obtained in multiple scattering investigations. Therefore, it can be inferred that depolarization from slightly rough surfaces is due to multiple scattering. For the sea, depolarization increases with wind speed and with the magnitude of the complex dielectric constant of the surface.

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:15 ,  Issue: 4 )