Reconfigurable Intelligent Surfaces for THz: Hardware Design and Signal Processing Challenges

George C. Alexandropoulos, Antonio Clemente, Sérgio Matos, Ryan Husbands, Sean Ahearne, Qi Luo, Verónica Lain-Rubio, Thomas Kürner, Luís M. Pessoa

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


Wireless communications in the THz frequency band is an envisioned revolutionary technology for sixth Generation (6G) networks. However, such frequencies impose certain coverage and device design challenges that need to be efficiently overcome. To this end, the development of cost- and energy-efficient approaches for scaling these networks to realistic scenarios constitute a necessity. Among the recent research trends contributing to these objectives belongs the technology of Reconfigurable Intelligent Surfaces (RISs). In fact, several high-level descriptions of THz systems based on RISs have been populating the literature. Nevertheless, hardware implementations of those systems are still very scarce, and not at the scale intended for most envisioned THz scenarios. In this paper, we overview some of the most significant hardware design and signal processing challenges with THz RISs, and present a preliminary analysis of their impact on the overall link budget and system performance, conducted in the framework of the ongoing TERRAMETA project.
Original languageEnglish
Title of host publication2024 18th European Conference on Antennas and Propagation (EuCAP)
Place of PublicationGlasgow, United Kingdom
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages5
ISBN (Electronic)978-88-31299-09-1
Publication statusPublished - 26 Apr 2024
Event18th European Conference on Antennas and Propagation (EuCAP 2024) - Glasgow, United Kingdom
Duration: 17 Mar 202422 Mar 2024
Conference number: 18


Conference18th European Conference on Antennas and Propagation (EuCAP 2024)
Abbreviated titleEuCAP 2024
Country/TerritoryUnited Kingdom
Internet address


  • Wireless communication
  • Quantization (signal)
  • System performance
  • Scalability
  • Reconfigurable intelligent surfaces
  • Hardware
  • Surface roughness
  • Reconfigurable intelligent surface
  • 6G
  • THz
  • beamforming
  • beam squint
  • link budget
  • use cases


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