Depolarization and scattering of electromagnetic waves by irregular boundaries for arbitrary incident and scatter angles fullwave solutions
Abstract
Explicit expressions are presented for the radiation fields scattered by rough surfaces. Both electric and magnetic dipole sources are assumed, thus excitations of both vertically and horizontally polarized waves are considered. The solutions are based on a fullwave approach which employs complete field expansions and exact boundary conditions at the irregular boundary. The scattering and depolarization coefficients are derived for arbitrary incident and scatter angles. When the observation point is at the source these scattering coefficients are related to the backscatter cross section per unit area. Solutions based on the approximate impedance boundary condition are also given, and the suitability of these approximations are examined. The fullwave solutions are shown to satisfy the reciprocity relationships in electromagnetic theory, and they can be applied directly to problems of scattering and depolarization by periodic and random rough surfaces.
 Publication:

IEEE Transactions on Antennas and Propagation
 Pub Date:
 March 1979
 DOI:
 10.1109/TAP.1979.1142063
 Bibcode:
 1979ITAP...27..214B
 Keywords:

 Backscattering;
 Boundary Value Problems;
 Depolarization;
 Electromagnetic Scattering;
 Incident Radiation;
 Surface Roughness Effects;
 Approximation;
 Boundary Conditions;
 Electric Dipoles;
 Magnetic Dipoles;
 Reciprocal Theorems;
 Scattering Coefficients;
 Scattering Cross Sections;
 Wave Excitation;
 Communications and Radar