@inproceedings{ba50c1ea8cff448595c2263e16803c1d,
title = "Electromagnetic modeling of holographic intelligent reflecting surfaces at terahertz bands",
abstract = "Intelligent reflecting surface (IRS)-assisted wireless communication is widely deemed a key enabler for 6G systems. The main challenge in deploying an IRS-aided terahertz (THz) link, though, is the severe propagation losses at high frequency bands. Hence, a THz IRS is expected to consist of a massive number of reflecting elements to compensate for those losses. However, as the IRS size grows, the conventional far-field assumption starts becoming invalid and the spherical wavefront of the radiated waves must be taken into account. In this work, we focus on the near-field and analytically determine the IRS response in the Fresnel zone by leveraging electromagnetic theory. Specifically, we derive a novel expression for the path loss and beampattern of a holographic IRS, which is then used to model its discrete counterpart. Our analysis sheds light on the modeling aspects and beamfocusing capabilities of THz IRSs.",
keywords = "Beamfocusing, electromagnetics, intelligent reflecting surfaces, near-field, THz communications",
author = "Konstantinos Dovelos and Assimonis, {Stylianos D.} and {Quoc Ngo}, Hien and Boris Bellalta and Michail Matthaiou",
year = "2022",
month = mar,
day = "4",
doi = "10.1109/IEEECONF53345.2021.9723188",
language = "English",
series = "Asilomar Conference on Signals, Systems and Computers: Proceedings",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "415--420",
editor = "Matthews, {Michael B.}",
booktitle = "Proceedings of the 55th Asilomar Conference on Signals, Systems and Computers, ACSSC 2021",
address = "United States",
note = "55th Asilomar Conference on Signals, Systems and Computers, ACSSC 2021 ; Conference date: 31-10-2021 Through 03-11-2021",
}