Paper Info
Title
Multiwideband Terahertz Communications Via Tunable Graphene-Based Metasurfaces in 6G Networks: Graphene Enables Ultimate Multiwideband THz Wavefront Control
Abstract
The next generation of wireless networks is expected to tap into the terahertz (THz) band (0.1–10 THz) to satisfy the extreme latency and bandwidth density requirements of future applications. However, the development of systems in this band is challenging as THz waves confront severe spreading and penetration losses, as well as molecular absorption, which leads to strong line-of-sight requirements through highly directive antennas. Recently, reconfigurable intelligent surfaces (RISs) have been proposed to address issues derived from non-line-of-sight (non-LoS) propagation, among other impairments, by redirecting the incident wave toward the receiver and implementing virtual-line-of-sight communications. However, the benefits provided by a RIS may be lost if the network operates at multiple bands. In this article, the suitability of the RIS paradigm in indoor THz scenarios for 6G is assessed grounded on the analysis of a tunable graphene-based RIS that can operate in multiple wideband transparency windows. A possible implementation of such a RIS is provided and numerically evaluated at 0.65/0.85/1.05 THz separately, demonstrating that beam steering and other relevant functionalities are realizable with excellent performance. Finally, the challenges associated with the design and fabrication of multiwideband graphene-based RISs are discussed, paving the way to the concurrent control of multiple THz bands in the context of 6G networks.
Year
DOI
Venue
2022
10.1109/MVT.2022.3155905
IEEE Vehicular Technology Magazine
Keywords
DocType
Volume
beam steering,concurrent control,indoor THz scenarios,molecular absorption,multiwideband terahertz communications,multiwideband graphene-based RIS,tunable graphene-based metasurfaces,virtual-line-of-sight communications,multiwideband THz wavefront control,nonLoS propagation,THz bands,multiple wideband transparency windows,tunable graphene-based RIS,incident wave,nonline-of-sight propagation,reconfigurable intelligent surfaces,directive antennas,line-of-sight requirements,penetration losses,THz waves,bandwidth density requirements,terahertz band,next generation wireless networks,6G networks,frequency 0.1 THz to 10.0 THz
Journal
17
Issue
ISSN
Citations 
2
1556-6072
0
PageRank 
References 
Authors
0.34
6
9
Name
Order
Citations
PageRank
Hamidreza Taghvaee111.35
Alexandros Pitilakis200.34
Odysseas Tsilipakos310.68
Anna C. Tasolamprou400.34
Nikolaos V. Kantartzis500.68
M. Kafesaki600.68
Albert Cabellos-Aparicio700.34
Eduard Alarcon882.25
Sergi Abadal918022.96