Angular and polarization stability of broadband reconfigurable intelligent surfaces of binary type
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2022
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Language
en
Pages
16
126253 - 126268
126253 - 126268
Series
IEEE Access, Volume 10
Abstract
Recently, reconfigurable intelligent surfaces (RISs) gained notable consideration due to their ability to provide efficient and cost-effective wireless communication networks. However, this powerful concept often suffers from simplistic modeling which underestimates such features of RIS as the resonant frequency dispersion and strong angular dependency of the reflection phases for both TE and TM polarizations of the incident wave. The angular and polarization instability of the reflection phase is a fundamental restriction of RISs, especially restrictive if the operation frequency band is broad. In this paper, we address this challenge for a binary RIS performed as a metasurface. We have studied the reflection phase frequency dispersion (RPFD) analytically that allowed us to engineer the needed angular and polarization properties of the RIS. Our RIS is a self-resonant grid of Jerusalem crosses located on a thin metal-backed dielectric substrate. Adjacent crosses are connected by switchable capacitive loads. We have shown the advantage of our metasurface compared to switchable mushroom-field structures and meta-gratings of resonant patches. An RIS is also fabricated and measured, and the experimental results corroborate well our numerical full wave simulations and analytical predictions.Description
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Keywords
Angular stability, Reconfigurable Intelligent Surface (RIS), Wireless communication
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Citation
Shabanpour, J & Simovski, C R 2022, ' Angular and polarization stability of broadband reconfigurable intelligent surfaces of binary type ', IEEE Access, vol. 10, pp. 126253 - 126268 . https://doi.org/10.1109/ACCESS.2022.3226264