Double Directional Channel Measurements at 300 GHz in Indoor Environments Enhanced by Reconfigurable Intelligent Surfaces

Terahertz (THz) communications is seen as one of the enabling key technologies for future wireless communications with the potential to provide extremely high data rates. One of the remaining challenges for THz communications is the bare necessity of a line-of-sight (Los) condition to ensure the reliable and seamless operation of wireless communications. The introduction of reconfigurable intelligent surface (RIS) in THz communications is expected to overcome this intrinsic requirement and thus facilitate the provision of enhanced reliability and performance. To comprehensively understand its influence on the propagation channel, channel measurements were conducted in an indoor environment comprising a RIS using a channel sounder operating at a frequency range of 300 Gigahertz (GHz). The paper presents the results and findings of the double directional channel measurement of the THz propagation channel supported by a non-configurable passive RIS. The measurement results exhibit improved spatial diversity through the use of RIS.