Results 91 to 100 of about 130,971 (229)

Adaptive Active Illumination Via Translationally and Axially Tunable Cascaded Metasurfaces

Advanced Science, EarlyView.
Active three‐dimensional sensing faces a fundamental trade‐off between seeing farther and covering more of the scene. Translationally and axially tunable cascaded metasurfaces overcome this limitation by continuously adapting beam direction and illumination coverage.
Chi Zhang, Jianing Yang, Lingyun Zhang, Jingyu Bao, Bingbai Li, Qingsong Feng, Rui You, Xiaoli Jing, Fei Xing, Xiaoguang Zhao, Zheng You   +10 more
wiley   +1 more source

Cross-scale Material-Structure Synergy for 2D Metamaterials: Toward Customizable Intelligent Electromagnetic Manipulation in Multiphysics Fields. [PDF]

Adv Sci (Weinh)
Recent advances in metasurface‐enabled low‐observable technologies are reviewed from the perspective of cross‐scale material–structure synergy. Electromagnetic, thermal, optical, and acoustic stealth are highlighted together with dynamic tuning, programmable coding, data‐driven inverse design, artificial intelligence, multispectral compatibility, and ...
Wang S, Yang X, Liu L, Peng Y, Wang Y, Lv H.   +5 more
europepmc   +2 more sources

Non‐Uniform Space‐Time‐Coding Modulation for Low‐Complexity Diagnostics of Reconfigurable Intelligent Surfaces

Advanced Electronic Materials, EarlyView.
A diagnostic method for reconfigurable intelligent surfaces (RIS) based on non‐uniform space‐time‐coding modulation is presented. Fault localization is achieved via amplitude‐only spectral measurements, eliminating the need for complex signal processing. A one‐to‐one mapping between harmonic components and RIS elements enables accurate detection.
Xiao Qing Chen, Lei Zhang, Yi Ning Zheng, Bing Bing Zhu, Marco Rossi, Giuseppe Castaldi, Shuo Liu, Vincenzo Galdi, Tie Jun Cui   +8 more
wiley   +1 more source

Adaptive Electromagnetic Manipulation via Smart Metasurface with Ultrasonic Spatial Sensing

Small Structures
Programmable metasurfaces with smart control systems have attracted significant attention in recent years owing to their brilliant ability to manipulate electromagnetic (EM) waves without human operation.
Lin Bai, Yuan Ke Liu, Xin Ge Zhang, Wei Xiang Jiang   +3 more
doaj   +1 more source

Simplistic framework of single-pixel-programmable metasurfaces integrated with capsuled LED array

Coding metasurfaces can manipulate electromagnetic wave in real time with high degree of freedom, the fascinating properties of which enrich the metasurface design with a wide range of application prospects.
Xinmin Fu (10641619), Jiafu Wang (2141164), Yajuan Han (527216), Cunqian Feng (17844347), Sai Sui (13968222), Ruichao Zhu (11386896), Shaobo Qu (11672812), Shaojie Wang (552082), Yuxi Li (3939713), Hongya Chen (12159287)   +9 more
core   +1 more source

A General and Efficient Framework for the Rapid Design of Miniaturized, Wideband, and High‐Bit RIS

Advanced Electronic Materials, EarlyView.
A general and efficient framework is proposed for the rapid design of high‐performance reconfigurable intelligent surfaces (RISs). This framework integrates advanced antenna design techniques and incorporates various load types, quantities, and values to achieve the design of high‐performance RISs.
Jun Wei Zhang, Zheng Xing Wang, Wanwan Cao, Zhen Jie Qi, Li Jie Wu, Han Qing Yang, Qun Yan Zhou, Si Ran Wang, Hui Dong Li, Jun Yan Dai, Jiang Luo, Jun Wei Wu, Jia Nan Zhang, Zhen Zhang, Qiang Cheng   +14 more
wiley   +1 more source

Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective

Advanced Electronic Materials, EarlyView.
Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Vincenzo Galdi   +4 more
wiley   +1 more source

Programmable chiral metasurfaces for 6G THz systems

Frontiers in Antennas and Propagation
Terahertz wireless systems require adaptive control of polarization as well as beam direction. Chiral metasurfaces offer one route to this control, but structural chirality, spin-dependent wavefront shaping and independent polarization-channel ...
Jamal Kazmi, Muhammad Qaisar Zakria, Aziz Khan   +2 more
doaj   +1 more source

Updatable Closed‐Form Evaluation of Arbitrarily Complex Multiport Network Connections

Advanced Electronic Materials, EarlyView.
The inverse design of electrically large wave devices often uses reduced‐order multiport models with discrete optimization, requiring many evaluations of complex interconnections between subsystems that differ only in a few blocks. This paper introduces a closed‐form framework enabling efficient Woodbury low‐rank updates of related, previous ...
Hugo Prod'homme, Philipp del Hougne
wiley   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source