As the communication industry is hurtling towards greater bandwidth and higher data-rate to satisfy the ever-increasing data demand; terahertz range of frequencies from 100 GHz to 3 THz are being investigated as a possible replacement of the conventional mm-wave technology. In this review, we have put forward a detailed analysis of the applicability of this aforementioned THz range in different link lengths, with experimental validation of THz loss number over the frequency range of interest, quantitative estimation of link budget of a typical THz communication system based on the calculated loss number and have provided several insightful THz technology information charts relevant for THz communication application. Our study shows, that, considering the current and foreseeable future technology scale and in spite of unsurmountable problem of high atmospheric attenuation, THz range is best suited for short-range to very-short-range communication where the challenges of THz frequencies would actually impart greater advantages with specific source-receiver combination and propagation scheme. We have also identified several possible modalities of THz communication links in this short range; especially, in the areas of strategic and tactical communication. In conclusion, we have presented a collection of technology recommendations towards product development required for initiation and advancement of THz communication in India.

随着通信行业正朝着更大的带宽和更高的数据速率迈进，以满足不断增长的数据需求；正在研究从 100 GHz 到 3 THz 的太赫兹频率范围，作为传统毫米波技术的可能替代品。在这篇综述中，我们对上述太赫兹范围在不同链路长度的适用性进行了详细分析，在感兴趣的频率范围内对太赫兹损耗数进行了实验验证，对典型的太赫兹通信系统的链路预算进行了定量估计。关于计算的损耗数，并提供了几个与太赫兹通信应用相关的有见地的太赫兹技术信息图表。我们的研究表明，考虑到当前和可预见的未来技术规模，尽管存在无法克服的高大气衰减问题，但太赫兹范围最适合短距离到超短距离通信，其中太赫兹频率的挑战实际上会赋予特定源更大的优势-接收器组合和传播方案。我们还确定了这种短距离内太赫兹通信链路的几种可能方式；尤其是在战略和战术沟通领域。总之，我们针对在印度启动和推进太赫兹通信所需的产品开发提出了一系列技术建议。太赫兹范围最适合短距离到超短距离通信，在这种情况下，太赫兹频率的挑战实际上会通过特定的源接收器组合和传播方案带来更大的优势。我们还确定了这种短距离内太赫兹通信链路的几种可能方式；尤其是在战略和战术沟通领域。总之，我们针对在印度启动和推进太赫兹通信所需的产品开发提出了一系列技术建议。太赫兹范围最适合短距离到超短距离通信，在这种情况下，太赫兹频率的挑战实际上会通过特定的源接收器组合和传播方案带来更大的优势。我们还确定了这种短距离内太赫兹通信链路的几种可能方式；尤其是在战略和战术沟通领域。总之，我们针对在印度启动和推进太赫兹通信所需的产品开发提出了一系列技术建议。