Results 41 to 50 of about 5,669 (203)
Robot creativity: humanlike behaviour in the robot-robot interaction [PDF]
, 2020 Artificial Intelligence development is mainly directed toward imitating human reasoning and performing different tasks. For that purpose, related software and program solution where artificial intelligence is used have mostly thinking abilities. However,
Md Tomari, Mohd Razali +1 more
core
Sub‐THz Multifunctional Metasurfaces for Independent Transmission or Reflection Phase Manipulation
Advanced Optical Materials, Volume 14, Issue 4, 27 January 2026.This article presents a rigorous analysis, design, and characterization of a novel sub‐THz metalens and reflective metasurface. Unlike bulky optical systems, the proposed thin, planar metasurface enables dual‐band full‐space wavefront control, via low‐loss transmission and reflection phase tuning, offering compact integration and improved ...
Bilal Ouardi +5 more
wiley +1 more source
Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field
Scientific Reports, 2017 Orbital angular momentum (OAM) mode combining and canceling in the near-field was investigated using a Cassegrain dual-reflectarray antenna composed of multiple microstrip patches on the main and sub-reflectarrays.
Woo Jin Byun +2 more
doaj +1 more source
A Scalable and Integrated Reconfigurable Intelligent Surface
Advanced Electronic Materials, Volume 12, Issue 1, 7 January 2026.A scalable X‐band reconfigurable intelligent surface is presented using one‐bit phase‐tunable unit cells with integrated FPGA control. The RIS supports fast, high‐speed reconfiguration through WiFi, LAN, and USB interfaces and can be scaled to multiple tiles. The design achieves over 20 dBi broadside gain and reliable 2D beam steering in both elevation
Zaid Akram +6 more
wiley +1 more source
Resonant Elements for Tunable Reflectarray Antenna Design
International Journal of Antennas and Propagation, 2012 This paper presents an accurate analysis of different configurations of reflectarray resonant elements that can be used for the design of passive and tunable reflectarrays.
M. Y. Ismail, M. Inam
doaj +1 more source
Geometric Phase Metasurface for Lens Antenna System With High Polarisation Purity and Efficiency
IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.This work presents a millimetre‐wave antenna–metalens system based on the Pancharatnam–Berry phase principle, operating efficiently from 82 to 95 GHz. The system achieves high directivity (up to 34.7 dB), excellent polarisation purity (AR < 2 dB) and aperture efficiency exceeding 30%. The same metalens is also characterised at 75 and 105 GHz, where the
Alexia Moreno‐Peñarrubia +5 more
wiley +1 more source
Graphene for Antenna Applications: Opportunities and Challenges from Microwaves to THz
, 2012 The use of graphene for antennas and other electromagnetic passives could bring significant benefit such as extreme miniaturization, monolithic integration with graphene RF nanoelectronics, efficient dynamic tuning, and even transparency and mechanical ...
Perruisseau-Carrier, Julien
core +1 more source
Electronics Letters, 1998 A novel folded reflectarray antenna is presented. This antenna combines a twist and focusing reflector concept in a single printed structure. Together with a printed grid, a low profile and high gain antenna results. A test antenna in the 20 GHz range was designed, fabricated and tested.
D. Pilz, W. Menzel
openaire +1 more source
International Journal of Antennas and Propagation, Volume 2026, Issue 1, 2026.Enhancing antenna gain remains a key requirement in modern wireless systems, particularly with the rapid evolution of 5G, emerging 6G networks, satellite links, and high‐resolution radar. Recent research trends increasingly rely on frequency‐selective surfaces (FSSs) and metasurface‐based reflectors, which offer precise electromagnetic wave control ...
A. J. A. Al-Gburi, Mohammad Rezwan Habib
wiley +1 more source
IEEE Access, 2018 A dual-layer active reflectarray configuration is proposed for broad-band beam-steering and/or frequency-tunable applications. A unit cell composed by two stacked fixed-size rectangular patches, properly loaded with a single varactor diode, is designed ...
Sandra Costanzo +3 more
doaj +1 more source