Year: 2025
Type: conference-paper
Abstract: Liquid crystal (LC) technology has emerged as a promising solution for large reconfigurable intelligent surfaces (RISs) at millimeter wave (mmWave) bands, offering advantages such as low power consumption, scalability, and continuously tunable phase shifts. For LC-RIS based on the delay-line architecture, i.e., with dedicated phase shifters, there exists a tradeoff between the maximum achievable phase-shift range and the corresponding insertion loss, which has not been studied for LC-RIS-assisted wireless systems yet. In this paper, we investigate this trade-off where a base station (BS) and an RIS are configured to minimize the transmitter (Tx) power while satisfying a given quality of service (QoS) for a number of users. Simulation results reveal a fundamental trade-off between the total Tx power and the achievable data rate as a function of the LC phase-shift range.
Authors: Bowu Wang, Mohamadreza Delbari, Robin Neuder, Alejandro Jiménez-Sáez, Vahid Jamali
Institution: Technische Universität Darmstadt
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Funder: Deutsche Forschungsgemeinschaft
OpenAlex ID: W4415524654