Accession Number:

AD0436811

Title:

THEORY OF THE SCATTERING OF ELECTROMAGNETIC WAVES BY IRREGULAR INTERFACES,

Descriptive Note:

Corporate Author:

CALIFORNIA INST OF TECH PASADENA ANTENNA LAB

Personal Author(s):

Report Date:

1964-01-01

Pagination or Media Count:

131.0

Abstract:

Two problems involving electromagnetic scattering from irregular interfaces are treated, both deterministic and statisical irregularities being considered. First, reflection of a partially polarized plane wave from a plane interface with large irregularities is studied using geometrical optics. Matrix transformations relating incident and reflected waves are obtained for reflection from a single specular point and from an extended area containing many independent reflectors. The properties of a wave reflected from a diffusely illuminated rough interface are found, and these results are used to study reflection noise reduction when a polarization-sensitive detector viewing near the Brewster angle is used in infrared temperature measurements. Second, the method of small perturbations is used to study scattering of an arbitrary completely polarized wave from an irregular interface of general underlying shape. The irregularities are replaced by equivalent surface currents and then the field in space is found using the dyadic Greens functions of the unperturbed problem. The results obtained are valid when the irregularity has small slope and amplitude small compared to the wavelength and local radii of curvature. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE