沙尘暴对太赫兹波传播的影响  

Effect of sand and dust storms on Terahertz electromagnetic wave propagation characteristics

作　　者：董群锋[1,2] 郭立新 李应乐 王明军[1] DONG Qunfeng;GUO Lixin;LI Yingle;WANG Mingjun(Department of Physics and Electronic Engineering,Xianyang Normal University,Xianyang Shaanxi 712000,China;School of Physics and Optoelectronic Engineering,Xidian University,Xi’an Shaanxi 710071,China;Science and Technology Department,Shaanxi Xueqian Normal University,Xi’an Shaanxi 710100,China)

机构地区：[1]咸阳师范学院物理与电子工程学院,陕西咸阳712000 [2]西安电子科技大学物理与光电工程学院,陕西西安710071 [3]陕西学前师范学院科技处,陕西西安710100

出　　处：《太赫兹科学与电子信息学报》2018年第4期599-602,共4页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家自然科学基金资助项目(61102018);中国博士后基金资助项目(2014M562371);陕西省自然科学基础研究资助项目(2014JM8312);咸阳师范学院青蓝计划人才培养资助项目(XSYQL201609)

摘　　要：为研究太赫兹波在沙尘暴中的传播特性,应用Mie散射理论研究了太赫兹波段沙尘粒子的散射特性,得到沙尘粒子的散射效率因子、消光效率因子和吸收效率因子随粒径、太赫兹波长的变化关系。基于沙尘粒子尺寸的对数正态分布,数值计算了沙尘暴的太赫兹衰减。研究结果表明,沙尘的衰减随能见度的增大而减小,波长越小,沙尘暴引起的太赫兹波衰减越大;波长为40μm时,沙尘暴对太赫兹波传播影响最大,浮尘对太赫兹波传播影响最小。低能见度沙尘暴对太赫兹波传播影响明显。To research the propagation characteristics of terahertz wave in sand and dust storms, based on Mie theory, the scattering characteristics of sand/dust particles are investigated for terahertz wave band, and the relationships of scattering efficiency factor, extinction efficiency factor and absorption efficiency factor with particle size and terahertz wavelength are obtained. The attenuation characteristic of terahertz electromagnetic wave propagation in sand and dust storms are calculated for sand and dust particles with log-normal size distribution. The research results show that the wave attenuation decreases with the increase of visibility of sandstorms and terahertz wavelength. From the numerical results of different sand weather at a wavelength of 40 μm, it is shown that sand-dust storm yields the highest effect for terahertz electromagnetic wave propagation, while the natural sand gives the lowest effect. The effect of low visibility sand and dust storms on terahertz wave propagation is obvious.

关 键 词：太赫兹波 沙尘 散射 衰减 

分 类 号：TN011.3[电子电信—物理电子学]