Results 81 to 90 of about 7,039 (276)

Engineering of Intelligent Reflecting Surfaces: Reflection Locality and Angular Stability

IEEE Transactions on Antennas and Propagation
Reconfigurable intelligent surfaces (RISs) are electromagnetically passive controllable structures, deflecting the incident wave beam in directions predefined by the control signal. A usual way to design RIS based on metasurfaces (MSs) is based on the application of the approximation in which the reflective properties of a uniform MS are attributed to ...
Javad Shabanpour, Vladimir Lenets, Geoffroy Lerosey, Sergei Tretyakov, Constantin Simovski   +4 more
openaire   +3 more sources

Optimal Beamforming for MISO Communications via Intelligent Reflecting Surfaces

, 2020
Wireless communications via intelligent reflecting surfaces (IRSs) has received considerable attention from both academia and industry. In particular, IRSs are able to create favorable wireless propagation environments with typically low-cost passive ...
Xianghao Yu, Dongfang Xu, Yu, Xianghao, Schober, Robert, Robert Schober, Xu, Dongfang   +5 more
core   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Reinforcement Learning for Resilient Aerial-IRS Assisted Wireless Communications Networks in the Presence of Multiple Jammers

IEEE Open Journal of the Communications Society
The evolving landscape of beyond 5G and 6G wireless communication systems in smart urban environments faces numerous interference-related challenges posed by legitimate and illicit devices.
Zain Ul Abideen Tariq, Emna Baccour, Aiman Erbad, Mounir Hamdi   +3 more
doaj   +1 more source

Intelligent Reflecting Surface-Aided Radar Spoofing

IEEE Wireless Communications Letters
Electronic countermeasure (ECM) technology plays a critical role in modern electronic warfare, which can interfere with enemy radar detection systems by noise or deceptive signals. However, the conventional active jamming strategy incurs additional hardware and power costs and has the potential threat of exposing the target itself.
Haozhe Wang 0007, Beixiong Zheng, Xiaodan Shao, Rui Zhang 0006   +3 more
openaire   +2 more sources

Intelligent Reflecting Surfaces (IRS) Metasurface-based with Tunable Varactor Diodes for Advanced 6G Wireless Applications [PDF]

, 2023
Intelligent Reflecting Surfaces (IRSs) stand as pivotal technology for augmenting the efficiency and performance of 5G wireless networks. However, the deployment of these surfaces, especially in the Ka-band (26 GHz and beyond) for the prospective 6G ...
Malau, H, Tong, KF, Wong, KK
core  

Influence of Geometric Design on Mechanical Performance of Auxetic Metastructure

Advanced Engineering Materials, EarlyView.
Strategic geometric reinforcement transforms auxetic performance. This study evaluates 3D‐printed arrowhead metastructures, revealing that a modified design with local ring reinforcement suppresses premature failure to achieve superior energy absorption and structural efficiency.
Muhammad Gulzari, Supharoek Sornsomrit, Muhammad Ayaz Akbar, Stephan Rudykh   +3 more
wiley   +1 more source

Double-Faced Active Intelligent Reflecting Surfaces-Assisted Symbiotic Radio Communications

IEEE Open Journal of Vehicular Technology
With the extensive deployment of Internet-of-Things (IoT) in next generation wireless systems, the problems of energy efficiency and battery life become exacerbated, highlighting the pressing need for innovative solutions.
Ahmed M. Benaya, Mohamed S. Hassan, Mahmoud H. Ismail, Taha Landolsi   +3 more
doaj   +1 more source

A Dislocation Perspective on Strength and Toughness in Ceramics

Advanced Engineering Materials, EarlyView.
Dislocations in ceramics enjoy a long but yet under‐appreciated history. The three research waves for dislocations in ceramics highlight the topic evolution over the last 90 years. This review focuses on the impact of dislocation on strength and toughness in ceramics.
Xufei Fang
wiley   +1 more source

IoT network performance enhancement with intelligent reflecting surfaces and relay

Journal of Information and Telecommunication
This article explores the integration of a relay station with two intelligent reflecting surfaces (IRSs) to enhance energy efficiency (EE) and system throughput (ST) in low-power wide-area networks (LPWAN) modelled for Internet of Things (IoT ...
Sang Q. Nguyen, Tran Cong Hung, Bui Trong Hoang, Bui Vu Minh, Yeon Ho Chung, Tan N. Nguyen   +5 more
doaj   +1 more source