Results 51 to 60 of about 4,866 (225)
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
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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
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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
Electronics Letters, 2003 It is shown that the dominant factor controlling reflectarray bandwidth is the bandwidth of the radiating element, and that the effect of non-constant path delays over the surface of the flat reflector has little significance unless the aperture is electrically very large and the f/D ratio is small. An example of a polarisation-twist reflectarray using
openaire +1 more source
IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.This paper presents a frequency‐reconfigurable dual‐band nematic liquid‐crystal (LC) reflectarray antenna with angular beam separation for satellite communication. Dual‐band operation at 12 and 28 GHz is achieved through voltage‐controlled reconfiguration of the LC layer.
Hsi‐Hsir Chou +3 more
wiley +1 more source
Известия высших учебных заведений России: Радиоэлектроника, 2022 Introduction. Duplex satellite communication is commonly arranged using two spaced frequency bands, with one band receiving and the other band transmitting signals to a satellite.
S. V. Polenga +9 more
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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
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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 +7 more
wiley +1 more source
Fractal and FractionalIn this article, a high-gain axisymmetric Minkowski fractal reflectarray is designed and fabricated for Ku-Band satellite internet communications. High gain is achieved here by carefully optimising the number of unit cells, their shape modifier, focal ...
Prabhat Kumar Patnaik +5 more
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