Asymmetric Angular Resilience in Near-Field Sub-THz Links: An Experimental Study at 300 GHz
Conference
Sen, P, Honan, B, Osmond, J et al. (2026). Asymmetric Angular Resilience in Near-Field Sub-THz Links: An Experimental Study at 300 GHz
. 10.1109/ICCSPA69228.2026.11600896
Sen, P, Honan, B, Osmond, J et al. (2026). Asymmetric Angular Resilience in Near-Field Sub-THz Links: An Experimental Study at 300 GHz
. 10.1109/ICCSPA69228.2026.11600896
This paper presents an experimentally validated characterization of mobile terahertz (THz) communication systems in the massive near-field. A Gaussian beam based model that utilized electromagnetic wave theory is described to evaluate beamforming in the near field, where the Friis path loss model no longer holds. Experimental results and theory both support that the near-field channel, although time invariant and linear, is not symmetric if the transmitter and receiver have different antenna gains, and the resultant channel capacity is different in uplink vs downlink. Further, it is shown that the receiver size has a significant impact on the angular resilience of THz wireless links, while the transmitter size can drastically effect the multipath components of the link. The findings indicate that larger transmitter and smaller receiver system may provide a significant advantage in mobile near-field THz.
