Results 51 to 60 of about 533,787 (299)
The socio-economic dimensions of the fisherman’s well-being at Batam Island: a descriptive survey [PDF]
, 2020 The well-being of the people is a fundamental part of a government's drive towards a developed nation. Indonesia's maritime community is one of the few minority communities that need attention in order to achieve Indonesia's balance of growth. Therefore,
Isa, Khairunesa +1 more
core +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
MEMS-reconfigurable metamaterials and antenna applications [PDF]
, 2014 This paper reviews some of our contributions to reconfigurable metamaterials, where dynamic control is enabled by micro-electro-mechanical systems (MEMS) technology.
Debogovic, Tomislav +1 more
core +3 more sources
IEEE Transactions on Antennas and Propagation, 2021 This contribution describes the design of a multibeam parabolic reflectarray to produce two adjacent beams per feed in orthogonal circular polarization (CP) simultaneously at the transmission (Tx) and reception (Rx) frequencies in the Ka-band.
Daniel Martinez-de-Rioja +6 more
semanticscholar +1 more source
Bandwidth Improvement in Large Reflectarrays by Using True-Time Delay [PDF]
, 2008 A significant improvement in the bandwidth of large reflectarrays is demonstrated using elements which allow true-time delay. Two identical, large reflectarrays have been designed using different phase distributions to generate a collimated beam.
Barba Gea, Mariano +2 more
core +2 more sources
Beam-Scanning Reflectarray Based on a Single Varactor-Tuned Element
International Journal of Antennas and Propagation, 2012 A single varactor-tuned element is investigated as effective solution for the realization of reconfigurable reflectarray antennas. The proposed configuration is successfully implemented for the design of an X-band reflectarray prototype of 3×15 radiators.
F. Venneri +6 more
doaj +1 more source
High-Efficiency Dielectric Reflectarray Antennas With Ultra-Wideband Characteristics
IEEE Access, 2021 In this study, a K-band offset dielectric reflectarray antenna, having high aperture efficiency and ultra-wideband characteristics, was designed. A column-type dielectric unit cell was employed for the dielectric reflectarray elements.
Eun-Cheol Choi, Sangwook Nam
doaj +1 more source
IEEE Transactions on Antennas and PropagationThis study presents a method to realize an optically transparent beam-steering antenna. The RF and optical features of liquid crystal (LC) technology are used in combination with transparent metal mesh to realize the first optically transparent ...
Peyman Aghabeyki +5 more
semanticscholar +1 more source
IEEE Access, 2020 A gain-enhancement scheme that combines an active integrated antenna (AIA) and an optically transparent reflectarray on solar cells is proposed for CubeSat applications.
Yen-Sheng Chen +2 more
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