Ultra-wideband Multipath Channel Characterization at 300 GHz

Abstract:
The possibility of expending high frequency bands, in specific millimeter and Terahertz (THz) bands, for high-speed information transmission beyond 100 Gbps has drawn a big attention in the last years. The extra-wide bandwidth available at THz band has the potential to realize the extremely high data rate needs. Nevertheless, the unique propagation characteristics at THz frequencies have to be first fully investigated. This work presents indoor ultra-wideband (UWB) channel sounding measurements across 60 GHz of bandwidth between 240-300 GHz using a channel sounder system based on Vector Network Analyzer (VNA) with frequency converters. The measurements are performed in Line-of-Sight (LoS) and reflected-non-LoS (RNLoS) transmission conditions with multiple scenarios. By matching the power delay profile (PDP) to the actual geometry, we distinguish between the reflections caused by the environment, and the undesired reflections produced due to the setup geometry. A further analysis of the channel mean excess delay, the root mean square (rms) delay spread and the coherence bandwidth is also provided.