The Diffraction of Waves in Passing through an Irregular Refracting Medium

Details The Diffraction of Waves in Passing through an Irregular Refracting Medium The Diffraction of Waves in Passing through an Irregular Refracting Medium

Dec 1953

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1953rspsa.220..455f&link_type=abstract

Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Volume 220, Issue 1143, pp. 455-471

Physics

30

Scientific paper

A relation is derived between the angular power spectrum of waves emerging from a thin diffracting screen random in two dimensions and the auto-correlation function describing the irregularities of the field as it emerges from the diffracting screen. The special case of an isotropic screen characterized by an auto-correlation function which depends only on distance and not on direction is discussed for normal and oblique incidence. Multiple scattering of waves caused by volume irregularities of the dielectric constant is considered. The angular power spectrum and the auto-correlation function describing the irregularities of the diffraction field caused by multiple scattering in a thick slab are determined. The results are compared with those obtained by Hewish for a thin phase-changing screen. The results are discussed in terms of problems arising in the study of radio-wave propagation.

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