Electromagnetic modeling of holographic intelligent reflecting surfaces at terahertz bands

Konstantinos Dovelos, Stylianos D. Assimonis, Hien Quoc Ngo, Boris Bellalta, Michail Matthaiou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)
28 Downloads (Pure)


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.

Original languageEnglish
Title of host publicationProceedings of the 55th Asilomar Conference on Signals, Systems and Computers, ACSSC 2021
EditorsMichael B. Matthews
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781665458283
Publication statusPublished - 04 Mar 2022
Event55th Asilomar Conference on Signals, Systems and Computers - Virtual, Pacific Grove, United States
Duration: 31 Oct 202103 Nov 2021

Publication series

NameAsilomar Conference on Signals, Systems and Computers: Proceedings
ISSN (Print)1058-6393


Conference55th Asilomar Conference on Signals, Systems and Computers
Abbreviated titleACSSC 2021
Country/TerritoryUnited States
CityVirtual, Pacific Grove


  • Beamfocusing
  • electromagnetics
  • intelligent reflecting surfaces
  • near-field
  • THz communications

ASJC Scopus subject areas

  • Signal Processing
  • Computer Networks and Communications


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