Aug 2026· Metamaterials· pp. 004-006· 1 citation· 11 references
Abstract
Electronically reconfigurable intelligent surfaces (RIS) offer a power-efficient solution for enhancing coverage, reducing latency, and enabling programmable propagation in emerging 6G wireless systems. This work presents a compact RIS unit-cell operating under circular polarization, formed by integrating four PIN diodes within a circular slot to realize a complementary split-ring resonator. The design achieves high reflection efficiency over 4.42-5.06 GHz (13.5% bandwidth) while providing 2-bit discrete phase control through diode state switching. The proposed approach enables low-loss, wideband, and fast reconfigurable beamforming suitable for scalable RIS deployments.
Reconfigurable Intelligent Surfaces (RIS), also known as programmable metasurfaces, have emerged as a promising technology for next-generation wireless communication systems by enabling programmable control over the propagation environment. Through dynamic manipulation of the phase, amplitude, and polarization of elect...
M. Fallahzadeh, Mohammad Hossein Koohi Ghamsari, A. Mallahzadeh et al.· 0 citations
These results establish LC‐based, AM‐driven glass panels as an energy‐efficient and manufacturing‐scalable materials platform for future transparent and reconfigurable wireless infrastructures.
Reconfigurable intelligent surfaces (RISs) are emerging as a key enabling technology to engineer the wireless propagation environment in 5G/6G systems. This paper presents the design, characterization, and control of a high-resolution RIS targeting slowly time-varying scenarios, in which fine-grained and stable phase c...
Giulia Malaponte, V. Castrillo, M. Inverno et al.· Electronics· 0 citations
Stacked reconfigurable intelligent surfaces (RISs) extend conventional planar reconfigurable intelligent surfaces by exploiting multi-layer metasurface structures to provide additional electromagnetic degrees of freedom. This study investigates the theoretical performance of stacked RIS-aided wireless communication sys...
Thai-Hoc Vu, Jian-Cheng An, Anh-Tu Le et al.· International Conference Rad...· 0 citations
In recent years, metasurfaces have been explored for various applications, including reconfigurable intelligent surfaces (RISs). RISs are expected to extend the coverage of nextgeneration communication systems by altering the reflection angle of incident waves in an artificial manner. However, conventional RISs require...
E. Omori, A. Nagata, S. Sugiura et al.· Metamaterials· 0 citations
The design and optimization of large antenna arrays and Reconfigurable Intelligent Surfaces (RIS) have become critical for emerging wireless communication systems, including 5G and 6G networks. Although technologies such as Massive Multiple Input Multiple Output (MIMO) and RIS offer unprecedented opportunities for enha...
Sekhar Sekharan, Reza Fazel-Rezai, S. Noghanian· Frontiers in Antennas and Pr...· 0 citations
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