Effects of spatial inhomogeneities and microwave emission enhancement in random media: an experimental study
Effects of spatial inhomogeneities and microwave emission enhancement in random media: an experimental study
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随机介质中空间不均匀性和微波发射增强的影响：实验研究
DOI：
10.1109/36.536524
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
R. Ruisi
中科院分区：
文献类型：
--
作者：
G. Macelloni;P. Pampaloni;S. Paloscia;R. Ruisi
利用反射屏上由细长的垂直介质柱体组成的实验模型，研究了散射元的空间分布对随机介质微波辐射的影响。在10 GHz和37 GHz、H、V极化以及不同的天底和方位角下进行了测量。研究了具有不同体积分数的随机“均匀”和“团簇”分布以及周期性的“行”构型。当圆柱体呈近圆形或平行排列时，在10 GHz和入射角小于50/spl deg/时，相对于均匀分布的发射有显著的增强，而在37 GHz时，团簇的发射较低，并强烈依赖于“排”构型的方位角。
The effects of spatial distribution of the scattering elements on microwave emission from random media have been investigated using an experimental model composed of long, thin vertical dielectric cylinders on a reflecting screen. The measurements have been carried out at 10 and 37 GHz, H, V polarizations and different nadir and azimuth angles. Random "uniform" and "cluster" distributions as well as periodic "row" configurations with different volume fractions have been studied. When the cylinders are distributed in nearly circular clusters or in parallel rows significant emission enhancement with respect to uniform distribution is detected at 10 GHz and incidence angle lower than 50/spl deg/, whereas, at 37 GHz the emission is lower for clusters and strongly dependent on azimuth angle for the "row" configuration.