發(fā)布時間：2018-03-01 11:19

  本文關鍵詞： 太赫茲 大氣傳輸 連續(xù)體吸收 吸收衰減 分層傳輸　出處：《太赫茲科學與電子信息學報》2016年01期 　論文類型：期刊論文

【摘要】：基于修正的Van-Vleck Weisskopf(VVW)線型,輻射傳輸色散理論和水汽連續(xù)體吸收模型,結合HITRAN數(shù)據(jù)庫,建立了太赫茲(THz)波大氣傳輸衰減和色散模型,并與毫米波傳播模型(MPM)的結果進行了對比分析。加入新的天頂分層方法,形成了對寬頻THz波在真實大氣中縱向傳輸吸收衰減和色散的數(shù)值模擬能力。研究了不同傳輸距離下THz波大氣分層傳輸衰減與色散特性、340 GHz和410 GHz窗口特性。研究結果表明:340 GHz和410 GHz大氣窗口垂直傳輸10 km以上,衰減分別低于25 d B和45 d B,群速色散很低,相位變化在0.01個量級,信號傳輸失真度小。
[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.
【作者單位】： 北京應用物理與計算數(shù)學研究所;中國工程物理研究院研究生部;中國工程物理研究院微系統(tǒng)與太赫茲研究中心;
【基金】：中國工程物理研究院太赫茲研究中心資助項目(T2014-06-0209)
【分類號】：TN011
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本文編號：1551699