Attenuation of electromagnetic wave propagation in sandstorms incorporating charged sand particles
Attenuation of electromagnetic wave propagation in sandstorms incorporating charged sand particles
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DOI：
10.1140/epje/i2004-10138-5
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发表时间：
2005-05
期刊：
影响因子：
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通讯作者：
Youhe Zhou;Qin Shu He;Xiao Jing Zheng
中科院分区：
文献类型：
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作者：
Youhe Zhou;Qin Shu He;Xiao Jing Zheng
提出了一种考虑沙粒上产生的电荷的微波传播衰减的理论预测方法。研究发现，部分分布在砂土表面的电荷对砂土的影响是显著的。在一定条件下，计算的衰减值与实测值吻合较好。砂粒表面电荷的分布不容易测量，可以通过测量电磁波的衰减值来近似确定。还定量讨论了沙尘半径、介电常数、电磁波频率和沙尘暴能见度等因素对衰减的影响。最后，引入一个新的电参数来描述散射、吸收和电荷效应在衰减中的作用。
A theoretical approach for predicting the attenuation of microwave propagation in sandstorms is presented, with electric charges generated on the sand grains taken into account. It is found that the effect of electric charges distributed partially on the sand surface is notable. The calculated attenuation is in good agreement with that measured in certain conditions. The distribution of electric charges on the surface of sand grains, which is not easy to measure, can be approximately determined by measuring the attenuation value of electromagnetic waves. Some effects of sand radius, dielectric permittivity, frequency of electromagnetic wave, and visibility of sandstorms on the attenuation are also discussed quantitatively. Finally, a new electric parameter is introduced to describe the roles of scattering, absorption and effect of charges in attenuation.