太赫兹波大气分层传输特性

发布时间：2018-03-01 11:19

  本文关键词： 太赫兹 大气传输 连续体吸收 吸收衰减 分层传输　出处：《太赫兹科学与电子信息学报》2016年01期 　论文类型：期刊论文

【摘要】：基于修正的Van-Vleck Weisskopf(VVW)线型,辐射传输色散理论和水汽连续体吸收模型,结合HITRAN数据库,建立了太赫兹(THz)波大气传输衰减和色散模型,并与毫米波传播模型(MPM)的结果进行了对比分析。加入新的天顶分层方法,形成了对宽频THz波在真实大气中纵向传输吸收衰减和色散的数值模拟能力。研究了不同传输距离下THz波大气分层传输衰减与色散特性、340 GHz和410 GHz窗口特性。研究结果表明:340 GHz和410 GHz大气窗口垂直传输10 km以上,衰减分别低于25 d B和45 d B,群速色散很低,相位变化在0.01个量级,信号传输失真度小。
[Abstract]:Based on the modified Van-Vleck Weisskopfen VVW line, the radiation transfer dispersion theory and the water vapor continuum absorption model, combined with the HITRAN database, the atmospheric propagation attenuation and dispersion model of terahertz (THz) wave is established. The results are compared with those of millimeter wave propagation model (MPM). The numerical simulation ability of absorption attenuation and dispersion of broadband THz waves in real atmosphere is obtained. The attenuation and dispersion characteristics of THz waves in different transmission distances are studied. The window characteristics of 340 GHz and 410 GHz are studied. The results show that the atmospheric windows of 10: 340 GHz and 410 GHz propagate more than 10 km vertically. The attenuation is less than 25 dB and 45 dB, the group velocity dispersion is very low, the phase change is 0.01 orders of magnitude, and the signal transmission distortion is small.
【作者单位】： 北京应用物理与计算数学研究所;中国工程物理研究院研究生部;中国工程物理研究院微系统与太赫兹研究中心;
【基金】：中国工程物理研究院太赫兹研究中心资助项目(T2014-06-0209)
【分类号】：TN011
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