How to Build a Multi-Kilometer Terabit-Per-Second Sub-Terahertz Wireless Backhaul

Over the past several decades the terahertz - and more specifically the sub-terahertz (sub-THz) - band has been explored as an enabling technology for future wireless communications systems. However, there has yet to be a practical system architecture to actualize long-range, terabit-per-second (Tbps), links. In this paper, a potential system design for a multi-kilometer, Tbps wireless backhaul using sub-THz communications is provided. The presented system implements an array of subarrays or an array of directional antennas architecture to perform distributed multiple-input multiple-output (MIMO), and the analytical results demonstrate the potential of the system to support Tbps links over multiple kilometers.