Results 51 to 60 of about 162,087 (215)
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
Advanced Design Methodologies and Novel Applications of Reflectarray Antennas [PDF]
, 2012 Reflectarray antennas combine the numerous advantages of printed antenna arrays and reflector antennas and create a hybrid high-gain antenna with a low-profile, low-mass, and diversified radiation performance.
Nayeri, Payam
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Reducing the Sidelobe Level of Reflectarray Antennas Using Phase Perturbation Method
Iranian Journal of Electrical and Electronic Engineering, 2020 Phase Perturbation Method (PPM) is introduced as a new phase-only synthesis method to design reflectarray antennas so as their sidelobe level is reduced.
M. Khalaj-Amirhosseini, M. Nadi-Abiz
doaj
Noninvasive Intelligent Brain‐Metasurface System for Real‐Time Electromagnetic Wave Manipulation
Nanophotonics, Volume 15, Issue 13, 13 July 2026.A noninvasive intelligent brain–computer interface (BCI) is integrated with a reconfigurable metasurface to establish a direct neural‐to electromagnetic transduction pathway for real time, multimodal wave control. By combining convolutional‐neural‐network‐based decoding of motor‐imagery electroencephalography (EEG) signals with threshold‐based ...
Xiao Hai +3 more
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Stretchable-Substrate-Impregnated Fabric: Deployable Reflectarray Antennas for CubeSats
IEEE AccessThis paper proposes a stretchable-substrate-impregnated fabric for deployable high-gain antenna for small satellites. Constellations of small satellites offer worldwide coverage of wireless communication and earth observation; high-gain antennas are ...
Masato Machida +3 more
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Low‐Profile, High‐Gain GRIN RF Lenses via Multi‐Material Vat Photopolymerization
Advanced Functional Materials, Volume 36, Issue 53, 2 July 2026.We investigate the opportunity of leveraging multi‐material vat photopolymerization printing to manufacture intricate lenses exhibiting permittivity gradients that can increase signal gain in transmitted radiofrequency signals in the X‐ and Ku‐bands. Lenses produced with more distinct low‐loss materials (up to 5) can deliver an 18 dB signal gain with a
Lawrence Romangsuriat +3 more
wiley +1 more source
A Review on the Development of Spaceborne Membrane Antennas
Space: Science & Technology, 2022 The membrane antenna technology is a very promising approach to obtain large aperture with light weight and low stowed volume. In the past decades, extensive studies have been carried out on active and passive membrane antennas.
Ming-Jian Li +4 more
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Dipole‐Quadrupole Model and Multipole Analysis of Resonant Membrane Metasurfaces
Laser &Photonics Reviews, Volume 20, Issue 12, 18 June 2026.Membrane metasurfaces, arrays of holes in a dielectric membrane, are appealing because they require no substrate and allow access to resonant near‐fields. However, developing a comprehensive theoretical description for them remains challenging. We introduce a semi‐analytical dipole‐quadrupole approach to analyze their resonant spectra at arbitrary ...
Izzatjon Allayarov +2 more
wiley +1 more source
Miniaturized Reflectarray Unit Cell Using Fractal-Shaped Patch-Slot Configuration
, 2012 This letter introduces a new class of miniaturized reflectarray unit cells with increased phase swing employing Minkowski fractal-shaped patch-slot elements.
Kordzadeh, Atefeh +6 more
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Advanced Materials Technologies, Volume 11, Issue 4, 19 February 2026.An LCD‐compatible complementary liquid‐crystal metasurface delivers dual‐band, dual‐polarized Ka‐band wavefront control with millisecond switching via a 10‐µm LC gap. Interlaced patch/slot pairs enable independent phase tuning at 28 and 38 GHz, while strategic 45° slot rotation suppresses parasitic resonances. Measurements on a 160 × 160‐cell prototype
Daehyeon Kim +4 more
wiley +1 more source