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The Terahertz (THz) band (0.1-10 THz) has been envisioned as one of thepromising spectrum bands for sixth-generation (6G) and beyond communications.In this paper, a dual-band angular-resolvable wideband channel measurement inan indoor L-shaped hallway is presented and THz channel characteristics at306-321 GHz and 356-371 GHz are analyzed. It is found that conventionalclose-in and alpha-beta path loss models cannot take good care of large-scalefading in the non-line-of-sight (NLoS) case, for which a modified alpha-betapath loss model for the NLoS case is proposed and verified in the NLoS case forboth indoor and outdoor L-shaped scenarios. To describe both large-scale andsmall-scale fading, a ray-tracing (RT)-statistical hybrid channel model isproposed in the THz hallway scenario. Specifically in the hybrid model, thedeterministic part in hybrid channel modeling uses RT modeling of dominantmulti-path components (MPCs), i.e., LoS and multi-bounce reflected paths in thenear-NLoS region, while dominant MPCs at far-NLoS positions can be deducedbased on the developed statistical evolving model. The evolving model describesthe continuous change of arrival angle, power and delay of dominant MPCs in theNLoS region. On the other hand, non-dominant MPCs are generated statistically.The proposed hybrid approach reduces the computational cost and solves theinaccuracy or even missing of dominant MPCs through RT at far-NLoS positions.

300 GHz Dual-Band Channel Measurement, Analysis and Modeling in an L-shaped Hallway