Propagation of Terahertz Signal through Tropical Thunderstorm

The increasing demand of higher data rate as well as wider bandwidth, has enhanced the necessity to exploit Terahertz(THz) spectrum in upcoming wireless communication systems. Starting from non-ionization, several unique properties are present in this spectrum, for which THz signal analysis has already captured a major area of cutting-edge research in ultrafast communication systems. Atmospheric attenuation can be considered as the main drawback in free-space THz-signal communication. Different types of suspended and falling hydrometeors, present in the atmosphere, can lead to absorption and scattering of THz signal. Rain is the most common type of falling aerosol, that are categorized as drizzles, showers, thunderstorm etc., depending on their diameters and rate of precipitation. In tropical weather scenario, the propagation of THz signal can be seriously affected under atmospheric precipitation. The authors, for the first time, have indigenously developed a Non-Linear Terahertz Rain Attenuation Model(NLTRAM) to estimate the tropical Rain-Attenuation Spectra of free-space THz signal under varying rain-rate and varying drop-diameters. In tropical climatic condition, the effect of Raindrop Size Distribution(RSD) and Depth of THz(DoT) under varying rain-rates, has been thoroughly investigated as the preliminary part of this model simulation and presented in this paper.