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首页> 美国政府科技报告 >Scattering of Electromagnetic Waves from a Dense Medium Consisting of CorrelatedMie Scatterers with Size Distributions and Applications to Dry Snow
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Scattering of Electromagnetic Waves from a Dense Medium Consisting of CorrelatedMie Scatterers with Size Distributions and Applications to Dry Snow

机译：从具有尺寸分布的相关散射体的重介质中散射电磁波及其在干雪中的应用

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摘要

The scattering of a plane electromagnetic wave obliquely incident on a layer ofdense medium consisting of dielectric spherical particles of finite sizes and with size distributions is studied. The spherical particles are of sizes comparable to wavelength so that Mie scattering is used to describe the single particle scattering characteristics. The coherent wave is studied with quasicrystalline approximation using the cross pair distribution functions of multiple sizes governed by Percus-Yevick approximation. The incoherent scattered wave is calculated with the distorted Born approximation with the result expressed in terms of a product of the T-matrices of particles of different sizes and permittivities and the Fourier transform of the cross pair distribution functions. The coherent wave effective propagation constants, the attenuation rates and the backscattering coefficients are illustrated numerically, with examples chosen to illustrate microwave and millimeter wave scattering from snow cover in the frequency range of 5 GHz to 95 GHz, and mean grain radius between 0.03 cm to 0.09 cm.

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