Results 51 to 60 of about 5,646 (202)
IEEE Access, 2018 A dual-layer active reflectarray configuration is proposed for broad-band beam-steering and/or frequency-tunable applications. A unit cell composed by two stacked fixed-size rectangular patches, properly loaded with a single varactor diode, is designed ...
Sandra Costanzo +3 more
doaj +1 more source
A Novel Design Approach to X-Band Minkowski Reflectarray Antennas using the Full-Wave EM Simulation-based Complete Neural Model with a Hybrid GA-NM Algorithm [PDF]
, 2014 In this work, a novel multi-objective design optimization procedure is presented for the Minkowski Reflectarray RAs using a complete 3-D CST Microwave Studio MWS-based Multilayer Perceptron Neural Network MLP NN model including the substrate constant εr ...
Demirel, S., Guneş, F., NESİL, S.
core +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 +1 more
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Advanced Electronic Materials, Volume 11, Issue 9, June 2025.A novel optically transparent reflectarray design approach based on multi‐resonant phase‐shifting elements with minimal fine metal line (FML) structures and low‐loss single‐layer cyclic olefin copolymer (COC) substrate is proposed. The design achieves exceptional antenna performance while ensuring high optical transparency, validated through wireless ...
Longzhu Cai +5 more
wiley +1 more source
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
doaj +1 more source
New Journal of Physics, 2022 In this paper, a three-dimensional accurate modeling of nematic liquid crystal (LC) has been presented for the analysis of reconfigurable reflectarray cells based on LC.
Jin-Ling Geng, Lizhong Song
doaj +1 more source
Penghasilan panduan keselamatan industri bagi kegunaan bakal graduan Kejuruteraan Elektrik Politeknik [PDF]
, 2003 Panduan keselamatan industri merupakan satu bentuk bimbingan yang penting kepada pelajar supaya mereka dapat mengetahui dengan jelas tentang amalan dan pengurusan keselamatan keija.
Wan Mahmud, Wan Mahzhir
core
A planar integrated folded reflectarray antenna with circular polarization [PDF]
, 2016 This communication presents the complete design of a circularly polarized (CP) folded reflectarray (FRA) antenna with an integrated planar structure for the first time in the open literature.
Gao, Steven +4 more
core +1 more source
Single‐Layer Reflectarray Providing Broadband Linear‐to‐Circular Polarization Conversion
Microwave and Optical Technology Letters, Volume 67, Issue 2, February 2025.ABSTRACT This paper introduces a single‐layer reflectarray (RA) design capable of converting incoming linearly polarized waves into outgoing circularly polarized ones while focusing the beam. The design employs nonresonant unit cells, extending the classical concept of meander‐line polarizers.
Samara Gharbieh +4 more
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
doaj +1 more source