{"ID":2881972,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2508.11489","arxiv_id":"2508.11489","title":"Liquid Crystal-Based RIS Loss-Trade-Off Analysis","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 trade-off 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 transmit power while satisfying a given quality of service (QoS) for a number of users. Simulation results reveal a fundamental trade-off between the total transmit power and the achievable data rate as a function of the LC phase-shift range.","short_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 de...","url_abs":"https://arxiv.org/abs/2508.11489","url_pdf":"https://arxiv.org/pdf/2508.11489v1","authors":"[\"Bowu Wang\",\"Mohamadreza Delbari\",\"Robin Neuder\",\"Alejandro Jiménez-Sáez\",\"Vahid Jamali\"]","published":"2025-08-15T14:09:28Z","proceeding":"eess.SP","tasks":"[\"eess.SP\"]","methods":"[]","has_code":false}