Correlation-based Dual-band THz Channel Measurements and Characterization in a Laboratory

The Terahertz band, spanning from 0.1 THz to 10 THz, is envisioned as a key technology to realize ultrahigh data rates in the 6 G and beyond mobile communication systems, due to its abundant bandwidth resource. However, to realize $\mathbf{T H z}$ communications, one substantial step is to fully understand the THz channels, which relies on extensive channel measurements. In this paper, using a correlation-based time domain channel sounder, measurement campaigns are conducted in a laboratory at 140 GHz and 220 GHz. In the data postprocessing procedures, the time drift of clock signals is corrected using a linear interpolation/extrapolation method. Based on the measured results, the main objects that provide significant oncescattering clusters are found, based on which the scattering losses are calculated and analyzed. Furthermore, the channel characteristics, including path loss, shadow fading, K-factor, etc. are calculated and compared to 3GPP standard values. The propagation analysis and channel characteristics are helpful to study channel modeling and guide system design for $\mathbf{T H z}$ communications.