Accession Number : ADA133601

Title :   Coherent Electromagnetic Wave Propagation and Scattering in Random Media.

Descriptive Note : Final rept. 16 Nov 81-30 Jun 83,


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

PDF Url : ADA133601

Report Date : Aug 1983

Pagination or Media Count : 89

Abstract : The effect of multiple scattering on the coherent wave propagation is discrete random media is studied for spherical and non-spherical dielectric scatterers as a function of frequency and volume concentration of scatterers. The first and second order probability distribution functions are specified and a self-consistent T-matrix approach together with Lax's quasi-crystalline approximation is used to derive dispersion equations whose singular solutions yield the complex propagation constant of the 'effective medium'. Various forms of pair-correlations were considered in the analysis; the self-consistent pair-correlation function is found to be well suited for a wide range of concentration of scatterers. The formalism is also found to be applicable for very high frequencies. The theoretical results obtained by this formalism were compared with experimental findings and the agreement is excellent. (Author)

Descriptors :   *Electromagnetic wave propagation, *Electromagnetic scattering, *Computations, Dielectrics, Coherent scattering, Coherence, Attenuation, Correlation, Probability distribution functions, Very high frequency, Equations

Subject Categories : Statistics and Probability
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE