Results 61 to 70 of about 10,722 (267)
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
New Journal of Physics, 2022 In this paper, a three-dimensional accurate modeling of nematic liquid crystal (LC) has been presented for the analysis of reconfigurable reflectarray cells based on LC.
Jin-Ling Geng, Lizhong Song
doaj +1 more source
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
Demonstration of a Shaped Beam Reflectarray Using Aperture-Coupled Delay Lines for LMDS Central Station Antenna [PDF]
, 2008 A shaped-beam reflectarray based on patches, aperture-coupled to delay lines is demonstrated for local multipoint distribution system (LMDS) central station antennas, in the 10.10-10.70 GHz band.
Arrebola, Manuel +3 more
core +3 more sources
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
IEEE Open Journal of Antennas and PropagationThis work proposes a phase-only synthesis technique for shaping the beam of a circularly polarized dual-reflector antenna with a subreflector consisting of a reflectarray and a main parabolic reflector.
Marzieh Mehri Dehnavi +1 more
doaj +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
IEEE Transactions on Antennas and Propagation, 2021 This work presents the design and experimental validation of a dual-band fully reconfigurable circularly polarized (CP) reflectarray (RA) antenna for satellite communication applications in the Ku-band.
E. Baladi +4 more
semanticscholar +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
Bandwidth Behavior of Closely Spaced Aperture-Coupled Reflectarrays
International Journal of Antennas and Propagation, 2012 The bandwidth features of reflectarray antennas are analyzed by examining in detail the phase errors due to the compensation mechanism for spatial phase delays.
F. Venneri, S. Costanzo, G. Di Massa
doaj +1 more source