1-bit RIS Unit Cell with Mechanical Reconfiguration at 28 GHz

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URI: https://hdl.handle.net/10481/111110
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Author
Baena-Molina, Marcos; Palomares Caballero, Ángel; Martinéz-García, Ginés; Padial-Allué, Rubén; Padilla De La Torre, Pablo; Valenzuela Valdés, Juan Francisco
Editorial
European Conference Antennas and Propagation (EurAAP)
Materia
3-D printing
 
mechanical reconfiguration
 
millimeter-wave frequencies
 
reconfigurable intelligent surface (RIS)
 
Date
2024-04-26
Referencia bibliográfica
Published version: M. Baena-Molina, Á. Palomares-Caballero, G. Martinéz-García, R. Padial-Allué, P. Padilla and J. F. Valenzuela-Valdés, "1-bit RIS Unit Cell with Mechanical Reconfiguration at 28 GHz," 2024 18th European Conference on Antennas and Propagation (EuCAP), Glasgow, United Kingdom, 2024, pp. 1-5, doi: 10.23919/EuCAP60739.2024.10500936
Sponsorship
MCIN/AEI/10.13039/501100011033 PID2020-112545RB-C54, PDC2022-133900-I00, TED2021-129938B-I00, TED2021-131699B-I00; Brittany Region Contract SAD 22006912 (SuMeRIO); European Union NextGenerationEU/PRTR; University of Granada
Abstract
In this paper, a mechanically tunable unit cell for reconfigurable intelligent surfaces (RIS) is presented. The RIS unit cell design is based on a metallic cylinder with a metallic cone-shaped element placed at one end. Thanks to the two positions provided by the mechanically reconfigurable cylinder, the cone-shaped element produces a phase shift in reflection of 180º at 28 GHz and therefore, giving the 1-bit reconfiguration. A comparison of the cone-shaped element with other types of geometries such as a cube and a cylinder has been performed. Besides, in view of the unit cell design, a cost-effective fabrication using 3-D printing and spray metallization is considered. A study of dimensional tolerances and conductivity values for the proposed RIS unit cell is done. The simulated results show the robustness of the RIS unit cell for both main dimensions and conductivity values for a frequency range between 25 GHz and 30 GHz.
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