Accession Number : ADA151766


Title :   Multiple Scattering of Electromagnetic Waves in Discrete Random Media.


Descriptive Note : Final rept. 1 Jul 83-31 Oct 84,


Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK WAVE PROPAGATION LAB


Personal Author(s) : Varadan,V K ; Varadan,V V


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a151766.pdf


Report Date : 31 Dec 1984


Pagination or Media Count : 267


Abstract : The study of attenuation, dispersion and the intensity of electromagnetic waves in a discrete random medium was pursued. The emphasis was on anisotropic effects induced by microstructure (nonspherical aligned scatterers); interpretation of the Quasi-Crystalline Approximation (QCA) as a partial summation of the multiple scattering series; a study of various methods of computing the pair- correlation function including Monte-Carlo techniques; a propagator model for wave propagation in random media based on Feyman diagrams and preliminary computation of the coherent and incoherent intensities which have also been compared with the experiments of Killey and Meeten; a spatial stochastic system model for wave propagation in random media and method of discontinuous stochastic field. A development that will be useful to the research on this project as well as the present one is the development of a QR-algorithm to obtained the T-matrix of scatterers with a high aspect ratio and deeply corrugated surfaces. Originator-supplied keywords include: Multiple scattering, discrete random media, coherent and incoherent intensities phase velocity, attenuation, frequency dependence, Monte-Carlo pair-correlation function, T-matrix, hybrid T-matrix and reinforced orthogonalization schemes, Lossy and lossless dielectrian non-spherical scatterers of high aspect ratios, Deeply corrugated rough surfaces, and Spatial stochastic system theory.


Descriptors :   *SCATTERING , *ELECTROMAGNETIC RADIATION , MATHEMATICAL MODELS , FUNCTIONS , SPATIAL DISTRIBUTION , MICROSTRUCTURE , STOCHASTIC PROCESSES , HIGH RATE , THEORY , INTENSITY , SURFACE ROUGHNESS , MONTE CARLO METHOD , SURFACES , CORRELATION , ANISOTROPY , ATTENUATION , MEDIA , SYSTEMS ANALYSIS , ASPECT RATIO , CORRUGATING


Subject Categories : Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE