The sub-THz spectrum between 90 GHz and 300 GHz offers opportunities for huge bandwidths, up to several tens of GHz, which is required to increase data rates and network capacities beyond 5G performance. The aggregation of all possibly allocated sub-THz bands should enable achievement of the 1-Tbps wireless communication.
The radio spectrum above 90 GHz is today essentially known for being used by scientiﬁc services (e.g. astronomy observation, earth exploration and satellite services, meteorology,etc.)and has never been used effectively for radio wireless communications purposes. It should however be noted that the radio regulations already allocated several frequency bands above 90 GHz to the ﬁxed and mobile services.
The radio regulation bodies, which are defining rules for spectrum allocation and usage, as well as their motivations are described in BRAVE deliverable D1.1.
The international Radio Regulation (RR) has decided in 2000 which frequencies between 90 and 275 GHz can be used for fixed or mobile radio-communication services: 105.2 GHz in total. Eighteen years later, the European regulation has published recommendations for fixed sub-THz links, considering the compatibility with the passive services.