Characterizations of Millimeter-Wave Reconfigurable Intelligent Surfaces in the Near-Field Region

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Reconfigurable intelligent surfaces (RISs) have been envisaged as a key and promising technology for evolved millimeter-wave 5G and upcoming 6G applications to enhance wireless communication channel capacity and quality. RISs are, in general, implemented with an electrically large size that is much larger than the wavelength at the frequency of interest. In some specific indoor application scenarios, such as intelligent factories, intelligent offices, intelligent shopping malls, etc., the users or targets are usually located at the near-field regions of the RISs. In these application scenarios, using RISs to perform near-field communications rather than conventional far-field communications might bring significant benefits. This paper will demonstrate our findings on the characterizations of millimeter-wave reconfigurable intelligent surfaces in the near-field regions, where it is found and concluded that using a near-field focusing RIS can indeed gain some benefits for wireless communications. Some figures of the metric of benefit distance and near-field gain are defined to quantitatively evaluate the benefits gained by the near-field focusing RIS. The findings will provide system-level reference and thumb of the rule of RISs for some indoor application scenarios, where the users are in the near-field region of the RIS.
Titel2023 Photonics and Electromagnetics Research Symposium, PIERS 2023 - Proceedings
Antal sider7
Publikationsdatoaug. 2023
ISBN (Trykt)979-8-3503-1285-0
ISBN (Elektronisk)979-8-3503-1284-3
StatusUdgivet - aug. 2023
Begivenhed2023 Photonics & Electromagnetics Research Symposium - Prague, Tjekkiet
Varighed: 3 jul. 20236 jul. 2023


Konference2023 Photonics & Electromagnetics Research Symposium
NavnPhotonics & Electromagnetics Research Symposium (PIERS)


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