Fundamental Studies in Scattering from Rough Surfaces.
Abstract
This report presents interim results of a study to account for multiple scattering in the theoretical modeling of scattering from rough surfaces. Based on the magnetic field integral equation for the current induced on a perfectly conducting rough surface, a k-space integral equation for the stochastic transform of the current is derived and discussed. The mean and variance of the scattered field is shown to be directly obtainable from the stochastic transform of the current. Limiting cases of a gently undulating surface and a surface which is uniformly rough, i.e., a pseudo white noise surface, are considered in detail. An approximate approach is presented for determining the mean or coherent scattered field is produced by a uniformly rough surface and the resulting solution clearly shows the important effects of multiple scattering. For the class of surfaces for which decorrelation does not imply statistical independence, it is found that the incoherent power scattered by such surfaces comprises two parts. The first part is the conventional diffuse term while the second part is specular in that it exists only at the specular scattering angle. For a gently undulating exponentially distributed surface, the incoherent specular power is found to exceed the coherent scattered power when the Rayleigh parameter is larger than unity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1982
- Accession Number
- ADA122584
Entities
People
- Gary S. Brown