Results 41 to 50 of about 140,738 (213)
Advanced Materials Technologies, Volume 11, Issue 18, 18 September 2026.Direct nanoscratching with a 500 nm diamond lapping film creates groove‐guided liquid‐crystal alignment interfaces on PCB‐compatible Cu‐patterned RF substrates within minutes, eliminating polymer coating and high‐temperature baking. The coating‐free process enables optical/molecular alignment validation and voltage‐programmable 28 GHz reflection‐phase ...
Junseok Ma +5 more
wiley +1 more source
Closed-Form Analysis of Reflection Losses in Microstrip Reflectarray Antennas [PDF]
, 2012 Microstrip reflectarray antennas consist of a grounded quasi-periodic array of printed elements able to compensate the phase displacement of a non-coherent electromagnetic excitation generated by a feeder.
MONORCHIO, AGOSTINO, COSTA, FILIPPO
core +1 more source
Tunable Reflectarray Cell for Wide Angle Beam-Steering Radar Applications
Journal of Electrical and Computer Engineering, 2013 An electronically tunable reflectarray element is proposed in this work to design beam-steering antennas useful for radar applications. A reduced size reflectarray unit cell is properly synthesized in order to extend the antenna beam scanning ...
F. Venneri, S. Costanzo, G. Di Massa
doaj +1 more source
Optimization Environment Definition for Beam Steering Reflectarray Antenna Design
Mathematics, 2021 Reflectarray antennas are low-profile high-gain systems widely applied in the aerospace industry. The increase in their application is leading to the problem of getting more advanced performance while keeping the system as simple as possible.
Alessandro Niccolai +4 more
doaj +1 more source
Nanophotonics, Volume 15, Issue 15, 13 August 2026.Conceptual illustration of the retro‐reflective and transmissive metasurface (RRTM). The blue radar establishes communication with the UAV via the transmissive mode, whereas the purple surveillance radar acquires the status of friendly units through the retro‐reflective mode and the two modes operate simultaneously within the same decoupled aperture ...
Shulei Zhang +8 more
wiley +1 more source
A Ku-Band Foldable Reflectarray Based on a Maltese-Cross Microstrip Element
Известия высших учебных заведений России: Радиоэлектроника, 2021 Introduction. Reflectarrays have a number of design and functional advantages over their closest analogue - reflector antennas (RA). Although microstrip elements are the most preferred reflectarray elements, single-layer microstrip elements do not allow ...
S. V. Polenga +5 more
doaj +1 more source
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
wiley +1 more source
Efficient Design of the Microstrip Reflectarray Antenna by Optimizing the Reflection Phase Curve
International Journal of Antennas and Propagation, 2016 The microstrip reflectarray antenna is an attractive directional antenna combining advantages of both the reflector and the microstrip array antenna. For the design of this kind of antenna, the conventional method, which is based on the reflection phase ...
Xing Chen +3 more
doaj +1 more source
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
IEEE Access, 2019 A broadband single-layer reflectarray antenna comprising circular ring elements dented with sectorial slits is presented. The sizes of circular rings are fixed and equal for all elements, while the variation of the reflected phase is obtained by varying ...
Huiting Yu, Lu Guo
doaj +1 more source