The Impact of Atmospheric Turbulence on Terahertz Communication

The application prospect of terahertz (THz) has been vastly enriched because it has the advantages of good penetrating power, high security, accurate directionality, and high bandwidth. Moreover, it is found that the atmospheric instability which is caused by fluctuating temperature and humidity has a great influence on THz communication. Therefore, in this paper, we mainly study the atmospheric conditions, focusing on the impact of atmospheric turbulence on THz communication under consideration of inland areas. Initially, we deduce the variances of fluctuating amplitude and fluctuating phase. And afterward, the quantitative analysis is presented for the overall effects of turbulence on THz wave, which offers the standard deviation of the fluctuating waves. The theoretical model reasonably explains the phenomena of signal fluctuations caused by the turbulence, and these fluctuations increase with the increment in the distance discovered by D. Grischkowsky. At last, we consider the atmospheric turbulence as a specific type of additive noise to study the influence on THz communication and to predict the upper limit of bandwidth efficiency influenced by turbulence in different atmospheric conditions.