Results 51 to 60 of about 3,272 (195)

Passive Microstrip Transmitarray Lens for Ku Band [PDF]

, 2010
The aim of this paper is to introduce a novel 12 GHz radiating design based on the idea of transmitarray lens device. In this document, an overview of the functioning of this kind of devices is given and the proposed transmitarray lens is studied, with ...
Muñoz Acevedo, Alfonso, Padilla de La Torre, Pablo, Sierra Castañer, Manuel   +2 more
core   +1 more source

Design of low-profile transmitarray antennas with wide mechanical beam steering at millimeter waves [PDF]

, 2023
Mechanical beam steering using a single Transmitarray (TA) can be a cost-effective solution for a high-gain antenna with wide-angle scanning. Elevation scanning can be achieved by a linear displacement of the feed in the focal plane parallel to the ...
Arrebola, M., Costa, J. R., Felício, J. M., Fernandes, C. A., Fonseca, N. J. G., Matos, S. A., Teixeira, J., Vaquero, Á. F.   +7 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

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

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

Multibeam volume acoustic backscatter imagery and reverberation measurements in the Northeastern Gulf of Mexico [PDF]

, 2002
Multibeam volume acoustic backscatterimagery and reverberation measurements are derived from data collected in 200-m-deep waters in the northeastern Gulf of Mexico, with the Toroidal Volume Search Sonar (TVSS), a 68-kHz cylindrical sonar operated by the ...
de Moustier, Christian, Gallaudet, Timoth C   +1 more
core   +3 more sources

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  

Electronically reconfigurable reflective phase shifter for circularly polarized reflectarray systems [PDF]

, 2016
This letter presents the design of a two-port electronically reconfigurable phase shifter for circularly polarized reflectarray systems at microwave frequencies. The phase shifter is based on 3 dB/90?
Fernández González, José Manuel, Padilla de La Torre, José Luis, Padilla de La Torre, Pablo, Sierra Castañer, Manuel, Valenzuela Valdés, Juan F.   +4 more
core   +2 more sources

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