Results 51 to 60 of about 1,257 (220)

Scalable and Energy-Efficient Millimeter Massive MIMO Architectures: Reflect-Array and Transmit-Array Antennas

, 2018
Hybrid analog-digital architectures are considered as promising candidates for implementing millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) systems since they enable a considerable reduction of the required number of costly radio ...
Fischer, Georg, Jamali, Vahid, Müller, Ralf, Schober, Robert, Tulino, Antonia M.   +4 more
core   +1 more source

Amplifier-Integrated Active Array Antennas for millimeter-Wave Radar [PDF]

, 2023
Modern wireless systems, especially at millimeterwave, place increasingly stringent requirements on size, weight,power and cost (SWaP-C). In this talk we present an overview of our recent work on active beamsteering array antennas for mmwave sensing ...
de Hek, Peter, de Kok, M., Garufo, Alessandro, Johannsen, Ulf, Monni, Stefania, Smolders, A.B., van Heijningen, Marc   +6 more
core   +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, Sheyly Ortiz‐Reyes, Jorge Teniente, Sergei Kuznetsov, Bakhtiyar Orazbayev, Miguel Beruete   +5 more
wiley   +1 more source

Nano-Dielectric Resonator Antenna Reflectarray/Transmittarray for Terahertz Applications

Advanced Electromagnetics, 2015
Nanoantennas have introduced wide bandwidth for fast data communications. The material properties of good conducting metals introduce plasmonic behavior at Terahertz frequencies.
H. A. Malhat, N. A. Eltresy, S. H. Zainud-Deen, K. H. Awadalla   +3 more
doaj   +1 more source

60-GHz Double-Layer Transmitarray Antenna Using Complementary Structure

Frontiers in Physics, 2022
—A novel double-layer transmitarray element is presented at 60 GHz with linearly- and circularly-polarized characteristics. A planar frequency-selective structure using the complementary design is adopted to augment the element performance for millimeter-
Wenxing An, Xiaochi Zhang, Yu Luo, Jian Wang, Lin Xiong   +4 more
doaj   +1 more source

Wideband Single‐Layer Reflectarray Antenna for Millimeter‐Wave 5G Communications

Journal of Sensors, Volume 2026, Issue 1, 2026.
The rapid evolution of intelligent applications has driven the demand for high‐performance antenna systems. Reflectarrays (RAs), also referred to as planar reflectors, have emerged as a promising solution for modern wireless and satellite communication systems due to their beam‐steering capability and high‐gain characteristics.
S. D. Khan, M. I. Abbasi, I. M. Ibrahim, N. H. Sulaiman, M. H. Dahri, M. A. Humayun, Hela Elmannai, Deepali   +7 more
wiley   +1 more source

Reconfigurable Reflectarrays and Array Lenses for Dynamic Antenna Beam Control: A Review

, 2013
Advances in reflectarrays and array lenses with electronic beam-forming capabilities are enabling a host of new possibilities for these high-performance, low-cost antenna architectures.
Hum, Sean Victor, Perruisseau-Carrier, Julien   +1 more
core   +1 more source

Cloaking and Antennas: From Theoretical Paradigms to Next‐Generation Intelligent Systems

Advanced Optical Materials, Volume 13, Issue 33, November 25, 2025.
The inception of electromagnetic cloaking sparked an immediate question: Can antennas be made invisible? Two decades later, this review charts the intertwined progress of major cloaking strategies (from transformation optics to scattering cancellation), metasurface technology, and their application to antennas, revealing how AI‐enabled devices are ...
Helen Guo, Xun Li
wiley   +1 more source

Phase-only Synthesis Algorithm for Transmitarrays and Dielectric Lenses [PDF]

, 2018
In this work a phase-only synthesis algorithm is applied for the design of lens-array antennas yielding a desired radiation pattern. The potential relevance of spillover effect on the lens radiation pattern is illustrated, making it necessary to include ...
Fernández Robledo, Omar, González Plaza, Enrique, León Fernández, Germán, Loredo Rodríguez, Susana   +3 more
core  

A Near‐Zero Index Metamaterial Lens for Reduced Complexity and High‐Performance Active Electronically Scanned Arrays

Advanced Electronic Materials, Volume 11, Issue 3, March 2025.
Subarray technology enables high‐performance limited field of view (LFOV) phased arrays, but these are necessarily complex with numerous phase shifters and other electronic components. A metalens is now introduced, which achieves excellent LFOV performance without the complexity of traditional designs.
J. Daniel Binion, Colin A. Mussman, Erik Lier, Thomas H. Hand, Douglas H. Werner   +4 more
wiley   +1 more source