4 papers
Wideband Illumination with Liquid Crystal Reconfigurable Intelligent Surfaces: Modeling, Design, and Experimental Tests
Mohamadreza Delbari, Robin Neuder, Alejandro Jiménez-Sáez +2
Liquid crystal (LC) is a promising hardware solution for implementing large RISs, as it is cost-effective, energy efficient, scalable, and capable of providing continuous phase shi…
Flexible RISs: Learning-based Array Manifold Estimation and Phase-shift Optimization
Mohamadreza Delbari, Ehsan Mohammadi, Mostafa Darabi +3
Reconfigurable intelligent surfaces (RISs) are envisioned as a key enabler for next-generation wireless networks, offering programmable control over propagation environments. While…
Scalable mm-Wave Liquid Crystal Reconfigurable Intelligent Surfaces based on the Delay Line Architecture
Julia Schwarzbeck, Robin Neuder, Marc Späth +1
This paper presents the design, fabrication, and characterization of broadband liquid crystal (LC) reconfigurable intelligent surfaces (RIS) operating around 60 GHz and scaling up…
Learning-Based Phase Shift Optimization of Liquid Crystal RIS in Dynamic mmWave Networks
Le Hao, Robin Neuder, Mohamadreza Delbari +4
To enhance coverage and signal quality in millimeter-wave (mmWave) frequencies, reconfigurable intelligent surfaces (RISs) have emerged as a game-changing solution to manipulate th…