RT info:eu-repo/semantics/masterThesis T1 Designing of Reconfigurable Intelligent Surfaces for 6G and mm-Wave A1 Novoa González, Marcos A2 Universidad de Valladolid. Escuela Técnica Superior de Ingenieros de Telecomunicación K1 6G K1 RIS K1 Unit cell AB The demand for ultra-fast data rates, low latency, and seamless connectivity is driving the development of 6G networks, which aim toovercome the limitations of 5G by leveraging higher frequency bands,including millimeter wave (mm-Wave) and terahertz (THz) spectra.However, these high-frequency bands present significant challenges,such as severe path loss and blockage sensitivity, which hinder reliable communication. Reconfigurable Intelligent Surfaces (RIS) haveemerged as a promising solution to enhance signal propagation, spectral efficiency, and energy consumption by dynamically controllingelectromagnetic waves.This study explores the design and simulation of RIS for 6G andmm-Wave frequencies, focusing on a 2-bit tunable unit cell employingvaractor diodes to achieve flexible beam reflection. Using CST StudioSuite, a detailed electromagnetic analysis is conducted, leading to thedevelopment of a 32×32 RIS array. Various linear coding schemes areimplemented to evaluate their impact on beam steering and reflectionangles. Simulation results demonstrate that the proposed RIS designeffectively enhances signal strength and coverage, maintaining consistent performance across different incidence angles. The findingsvalidate RIS as a key enabling technology for next-generation wirelesscommunication systems, offering improved energy efficiency, spectralutilization, and connectivity. YR 2025 FD 2025 LK https://uvadoc.uva.es/handle/10324/79706 UL https://uvadoc.uva.es/handle/10324/79706 LA eng NO Departamento de Teoría de la Señal y Comunicaciones e Ingeniería Telemática DS UVaDOC RD 07-dic-2025