Results 21 to 30 of about 1,366 (208)
Recent Developments of Reflectarray Antennas for Reconfigurable Beams Using Surface-Mounted RF-MEMS
International Journal of Antennas and Propagation, 2012 Some of the most recent developments in reconfigurable reflectarrays using surface-mounted RF-MEMS, which have been developed at the Universidad Politécnica de Madrid, are summarized in this paper.
Eduardo Carrasco +3 more
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BANDWIDTH CONSIDERATIONS FOR A MICROSTRIP REFLECTARRAY [PDF]
Progress In Electromagnetics Research B, 2008 The paper describes a theoretical investigation into a limited bandwidth operation of a microstrip reflectarray. Two main factors limiting the bandwidth are considered. One is related to the requirement of phase compensation to convert a spherical wavefront launched by a feed into a planar wavefront. The other one is linked to the limited phasing range
Bialkowski, M.E., Sayidmarie, K.H.
openaire +4 more sources
On the Reconfigurability of a Singly-Layered Dual-Band Reflectarray for Space Applications [PDF]
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2023 This paper presents a feasibility study of a singlylayered dual-band reflectarray for space applications. The data links should operate simultaneously at K-band downlink frequency band 17.7-20.2 GHz with left-hand circular polarization (LHCP) and at Ka ...
Roger L. Farias +2 more
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Reflectarray antennas for space applications [PDF]
2012 IEEE International Conference on Ultra-Wideband, 2012 In this paper, the advantages and recent developments of reflectarray antennas for space applications are reviewed. Basic requirements for space antennas, and the limitations and challenges of conventional designs are discussed. Various advantages of reflectarray antennas over reflectors and phased array antennas are reviewed and it is shown that ...
Atef Z. Elsherbeni +2 more
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Recent Developments of Reflectarray Antennas in Dual-Reflector Configurations
International Journal of Antennas and Propagation, 2012 Recent work on dual-reflector antennas involving reflectarrays is reviewed in this paper. Both dual-reflector antenna with a reflectarray subreflector and dual-reflectarrays antennas with flat or parabolic main reflectarray are considered.
Carolina Tienda +2 more
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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
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Tunable Reflectarrays and Metasurfaces [PDF]
, 2022 Fifth-generation (5G) wireless communication networks have been rapidly expanding in recent years. However, due to the higher frequency bands used in 5G applications compared with previous generations, it is more difficult for electromagnetic waves to ...
Zhang, Peng
core
Bandwidth Performances of Reconfigurable Reflectarrays: State of Art and Future Challenges [PDF]
Radioengineering, 2018 Reconfigurable antennas allow to meet the increasing demands of modern RF communication systems for reconfiguration capabilities, such as beam-steering, multi-band operation, polarization flexibility or frequency agility.
S. Costanzo +4 more
doaj
Characterization of a Split Circle Element for Microstrip Reflectarrays
Journal of Telecommunications and Information Technology, 2023 A split circular element is proposed as a unit cell for reflectarray antennas. The unit cell is derived from a circle divided into four equal sectors. The radius of two oppositely located sectors is then scaled by a certain factor to form the proposed ...
Khalil H. Sayidmarie, Likaa S. Yahya
doaj +1 more source
Near-field measurements of submillimeter-wave reflectarrays
, 2013 We present results of experimental characterization of static 650-GHz reflectarrays. The reflectarrays are based on 123-µm circular microstrip patch antennas with tuning stubs as phase shifters. The static reflectarrays are considered as predecessors for
Aleksi Tamminen +23 more
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