Sub-THz Spatially Modulated Beam Splitting Reflectors for Potential RIS Implementations
Phan, Duy Tung; Palosaari, Jaakko; Kong, Di; Siponkoski, Tuomo; Myllymäki, Sami; Leinonen, Marko E.; Pärssinen, Aarno; Juuti, Jari; Soh, Ping Jack (2024-04-26)
IEEE
26.04.2024
D. T. Phan et al., "Sub-THz Spatially Modulated Beam Splitting Reflectors for Potential RIS Implementations," 2024 18th European Conference on Antennas and Propagation (EuCAP), Glasgow, United Kingdom, 2024, pp. 1-4, doi: 10.23919/EuCAP60739.2024.10501537
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© 2024 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists,or reuse of any copyrighted component of this work in other works.
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202409175897
https://urn.fi/URN:NBN:fi:oulu-202409175897
Tiivistelmä
Abstract
Reconfigurable intelligent surfaces (RISs) promise to revolutionize wireless communications by creating a smart electromagnetic environment. They facilitate beamsplitting and beamsteering of EM waves in sub-THz communications. It's worth noting that implementing Reflective Intelligent Surfaces (RIS) in this high band using conventional concepts, such as metasurfaces or reflectarrays, requires individual control of elements or groups of elements, increasing fabrication complexity. In this study, we present a spatially modulated RIS concept, demonstrating its potential as a reconfigurable beam splitter. The proposed structures are first theoretically designed using theoretical calculations, followed by simulations and experimental validations. Unlike the traditional reflectors, this structure can manipulate sub-THz beams with a very simple reconfiguration, making it highly promising for dynamic sub-THz RIS implementation. By adjusting only the element spacing, it can split a 150 GHz normal incident wave into multiple beams at varying reflection angles. Such multi-beam control capability in reflectors promises a potential pathway towards enabling RISs in future joint communications and sensing systems.
Reconfigurable intelligent surfaces (RISs) promise to revolutionize wireless communications by creating a smart electromagnetic environment. They facilitate beamsplitting and beamsteering of EM waves in sub-THz communications. It's worth noting that implementing Reflective Intelligent Surfaces (RIS) in this high band using conventional concepts, such as metasurfaces or reflectarrays, requires individual control of elements or groups of elements, increasing fabrication complexity. In this study, we present a spatially modulated RIS concept, demonstrating its potential as a reconfigurable beam splitter. The proposed structures are first theoretically designed using theoretical calculations, followed by simulations and experimental validations. Unlike the traditional reflectors, this structure can manipulate sub-THz beams with a very simple reconfiguration, making it highly promising for dynamic sub-THz RIS implementation. By adjusting only the element spacing, it can split a 150 GHz normal incident wave into multiple beams at varying reflection angles. Such multi-beam control capability in reflectors promises a potential pathway towards enabling RISs in future joint communications and sensing systems.
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