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 dB和45 dB，群速色散很低，相位变化在0.01个量级，信号传输失真度小。

A THz wave atmospheric transmission and attenuation model is developed based on the radiation transmission theory, continuum absorption and modified Van Vleck-Weisskopf(VVW) line-shape combining with the HITRAN database. The absorbing attenuation characteristics are compared to Millimeter-wave Propagation Model(MPM). The new method of zenith stratification is added, which forms the numerical simulation ability of atmospheric vertical transmission attenuation and dispersion for broadband THz wave. The attenuation characteristics and window structures are studied at different distances. As a result, the attenuations of 340 GHz and 410 GHz atmospheric windows are less than 25 dB and 45 dB respectively. In addition, the group velocity dispersion is low, which enables the feasibility of signal transmission.