SHADOW CORRECTED ELECTROMAGNETIC WAVE SCATTERING FROM RANDOMLY VERY ROUGH SURFACES
The like- and cross-polarized scattering coefficients of electromagnetic waves from random rough surfaces corrected by shadowing functions are studied in this paper. Due to the use of approximate tangential surface fields in the derivative of all the wave scattering from randomly rough surfaces, the shadowing functions should be added to correct the scattering especially from surfaces with large rms surface slope. For correct prediction to the scattering characteristics we apply the suitable shadowing function to the single and multiple scattering respectively. The comparisons of scattering coefficients with or without shadowing functions are shown in this paper to evaluate the effect of shadowing function for the scattering from random very rough surfaces. We also compare the scattering coefficients with the measured data and find the good agreements between the measured data and the scattering coefficients with corrections of shadowing functions.
A. K. Fung, "Microwave scattering and emission models and their applications,`` Artech House, 1994.
Smith, R. G., "Geometrical shadowing of a randomly rough surfaces," IEEE Trans. Antennas Propagat., vol. AP-15, pp. 668-671, 1971.
M.I., Sancer, "Shadow-corrected electromagnetic scattering from a randomly rough surface,`` IEEE Trans. on Ant. and Propagation, Vol. 17, pp. 577-589, 1969
Brown, G. S., "The Validity of Shadowing Correction in Rough Surface Scattering,`` Radio Science, Vol. 19, pp. 1461â€“1468, 1984.
Brown, G. S., "Shadowing by non-Gaussian random surface," IEEE Trans. Antennas Propagat., vol. AP-28, pp. 778-790, 1980.
Ishimaru, A., Chen, J. S., Phu, P., And Yoshitomi, K., "Numerical, analytical, and experimental studies of scattering from very rough surfaces and backscattering enhancement,`` Waves in Random Media, vol., pp. 91-107, 1991.
Ishimaru, A., Le, C., Kuga, Y., Lynn, A. S., and Chan, T. K., "Polarimetric Scattering Theory for High Slope Rough Surfaces,`` in PIER 14 EM Scattering By Rough Surfaces and Random Media, EMW Publishing, Cambridge, MA., 1996.
Sancer, M. I., "Shadow corrected electromagnetic scattering from a randomly rough surface," IEEE Trans. Antennas Propagat., vol. AP-17, pp.577-589, 1969
Ulaby, F. T., Moore, R. K., and Fung, A. K., Microwave Remote Sensing: Active and Passive, Chapter 12, Vol. 2, Artech House, Norwood, MA, 1982.
O'Donnell, K.A. and E.R. Mendez, Experimental study of scattering from characterized random surfaces, J. Opt. Soc. Am. A, Vol. 4, pp. 1194-1205, 1987
Ishimaru, A. Experimental and theoretical studies on enhanced backscattering from scatterers and rough surfaces, in Scattering in Volumes and Surfaces, edited by M. Nieto-Vesperinas and J.C. Dainty, pp. 1-15, Amsterdam, Elsevier Science Publishers, 1990