Work

Characterization of Effective RCS for Fixed NLoS Sub-THz Links With Single Scattered Reflections

Year: 2024

Type: article

Abstract: This paper presents wideband channel measurements for indoor Non-Line-of-Sight (NLoS) fixed links operating at sub-Terahertz (sub-THz) frequencies (92.110 GHz) with single scattered reflections. Seemingly “smooth” surfaces generate substantial internal multipath causing frequency selective scattered reflections owing to the short wavelength. Unlike specular reflections, no single well-defined reflection point aligns the incidence angle ($\theta_{{\mathrm {i}}}$) and reflection angle ($\theta_{{\mathrm {r}}}$) to form the lowest path loss. This means that the scattering effect of the reflective surface gives reason to search for the best angular alignment of the Receiver (Rx) antenna given a specific angle from the Transmitter (Tx) antenna. The wideband effective Radar Cross Section (RCS) is derived and computed based on the bi-static radar equation, which specifically accounts for the effect of alignment angle on the defined frequency selective RCS. The measurements reveal alignment-variant angular scattering from large-scale discontinuities such as wall partitions, television screens and metallic reinforcement studs, offering valuable insights for the design and deployment of future wireless communications systems operating in the sub-THz band.

Source: IEEE Open Journal of Antennas and Propagation

DOI: 10.1109/ojap.2024.3448253

Authors: Demos Serghiou, Mohsen Khalily, Tim W. C. Brown, Rahim Tafazolli

Institution: University of Surrey

Language: English

Topic: Millimeter-Wave Propagation and Modeling

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,995

Funder: Engineering and Physical Sciences Research Council