Unexplored Aspects in THz Ray-Tracing

Presented in this paper are unexplored aspects of terahertz (THz) ray-tracing from antennas to propagation domains. Firstly, we come forth with a realistic angle spacing (or interval) for exporting composite 3D beam antenna patterns into shooting bouncing ray-tracing (SBR) method also verified by measurement data at 300 GHz carrier frequency. Further, the simulation results obtained for random and non-random rough surfaces at the frequency of interest in a realistic simple office environment encompassing both line-of-sight (LOS) and non-line-of-sight (NLOS) scenarios are compared to highlight the unexpected disparity observed in multipath dynamics and received signal strength. The real 3D surface topography parameters are inculcated for the random whilst the non-random rough surface adopts Rayleigh-Rice (R-R) and Beckmann-Kirchhoff (B-K) modeling approaches. Next, the issue of XY-grid spacing at 300 GHz is addressed to acquire a thorough understanding of in-room wave propagation which poses unique challenges for channel modeling.