Abstract

We use the full-wave approach to obtain the solutions for the diffuse single- and double-scatter radar cross sections for one-dimensional rough surfaces. The solutions are expressed in terms of two- and six-dimensional integrals (not integral equations) for the single- and double-scatter cross sections. High-frequency, stationary-phase approximations are applied to these multidimensional expressions. The full-wave, high-frequency approximate solutions are obtained in closed forms for the single-scatter cross sections and in terms of two-dimensional integrals for the double-scatter cross sections. The sharp peak in the backscatter direction is due to the contributions from the double-scatter quasi-antiparallel paths. The level and the angular width of the enhanced backscatter peak are frequency dependent. The high-frequency approximations provide physical insight into the multiple-scatter problem. However, they cannot be used to predict accurately the angular width of the backscatter peak and the polarization dependence of the scatter cross sections.

© 1995 Optical Society of America

Vertically and horizontally polarized diffuse double-scatter cross sections of one-dimensional random rough surfaces that exhibit enhanced-backscatter–full-wave solutions

E. Bahar and M. El-Shenawee
J. Opt. Soc. Am. A 11(8) 2271-2285 (1994)

Double-scatter cross sections for two-dimensional random rough surfaces that exhibit backscatter enhancement

Ezekiel Bahar and Magda El-Shenawee
J. Opt. Soc. Am. A 18(1) 108-116 (2001)

Depolarization and backscatter enhancement in light scattering from random rough surfaces: comparison of full-wave theory with experiment

Ezekiel Bahar and Mary Ann Fitzwater
J. Opt. Soc. Am. A 6(1) 33-43 (1989)

Backscattering enhancement of electromagnetic waves from two-dimensional perfectly conducting random rough surfaces based on Monte Carlo simulations

Kyung Pak, Leung Tsang, Chi H. Chan, and Joel Johnson
J. Opt. Soc. Am. A 12(11) 2491-2499 (1995)

Enhancement of backscattered diffuse specific intensities from random distributions of finitely conducting particles with rough surfaces

Ezekiel Bahar and Mary Ann Fitzwater
J. Opt. Soc. Am. A 5(1) 89-98 (1988)