Results 71 to 80 of about 1,366 (208)
Review of Wideband Passive Reflectarray Antennas
IEEE AccessReflectarray antennas (RAs) combine the high gain and low-loss space feed of reflectors with the per-element phase control of phased arrays, but their resonant, path-length-dependent operation makes bandwidth their principal limitation.
Reza Shamsaee Malfajani, Ahmed A. Kishk
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New Phase Realization Approach for Implementation of Braodband Reflectarrays
International Journal of Information and Communication Technology Research, 2021 We present a new phase realization approach applied to design the broadband single-layer reflectarray antennas. Such an optimization technique minimizes the adverse effects of frequency dispersion which limit the bandwidth of reflectarray antenna ...
Mahmood Rafaei-Booket +1 more
doaj
, 2019 This paper presents some recent developments in multiple beam antennas (MBAs) based on reflectarrays for communication satellites in K-and Ka-bands. The existing high through put satellites commonly employ four reflector antennas to provide cellular ...
Martínez de Rioja del Nido, Eduardo María +7 more
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Reconfigurable Reflectarrays: Design, Analysis and Fabrication
, 2015 Reflectarray antennas combine the advantages of both reflector and phased array antennas. Therefore, they offer low-loss, low-cost solutions for the high gain, beam steering and beam shaping applications.
AYDIN ÇİVİ, HATİCE ÖZLEM
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Resonant Elements for Tunable Reflectarray Antenna Design
International Journal of Antennas and Propagation, 2012 This paper presents an accurate analysis of different configurations of reflectarray resonant elements that can be used for the design of passive and tunable reflectarrays.
M. Y. Ismail, M. Inam
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Applied Sciences, 2018 An electrically tuned phase shifter based on the single slot unit cell and liquid crystal for a reconfigurable reflectarray antenna was presented. The simulation and measured results obtained at the F-band were used to demonstrate that the dielectric ...
Sheng Gao +7 more
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IEEE Access, 2019 We describe the results of a wideband, reconfigurable reflectarray concept based on polarization-rotating unit cells (PRUCs) with a minimum-switch topology design. To enhance the simplicity and decrease the cost, the approach focuses exclusively on a one-
Hung Luyen +3 more
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An Accurate and Efficient Design Tool for Large Contoured Beam Reflectarrays [PDF]
, 2012 An accurate and efficient tool for the design of contoured beam reflectarrays is presented. It is based on the Spectral Domain Method of Moments, the Local Periodicity approach, and a minimax optimization algorithm.
Breinbjerg, Olav +6 more
core
Fast phase-only synthesis of conformal reflectarrays
, 2010 Phase-only synthesis (POS) techniques represent an important tool for reflectarray design. Indeed, although based on approximate scattering models, for planar antennas, they are numerically effective thanks to the use of fast Fourier transform (FFT ...
LISENO, ANGELO +7 more
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Design of complementary reflectarray
Electronics Letters, 2014 A novel solution for the manufacture of a reflectarray antenna is presented. The unit cell simply consists of dielectric foam inserted between two thick metallic plates. The plate illuminated by the feeder is a 0.5 mm‐thick stainless steel sheet into which the C and the reverse C slots are laser cut.
CARLUCCIO, GIORGIO +2 more
openaire +3 more sources