Results 41 to 50 of about 533,787 (299)
International journal of RF and microwave computer-aided engineering, 2020 Contemplating the advancements in communication technology, the analysis of the features of reflectarray, transmitarray, and transmit‐reflectarray becomes essential for future adaptability.
Kavitha Narayanasamy +4 more
semanticscholar +1 more source
Mechanically Reconfigurable, Beam-Scanning Reflectarray and Transmitarray Antennas: A Review
Applied Sciences, 2021 We review mechanically reconfigurable reflectarray (RA) and transmitarray (TA) antennas. We categorize the proposed approaches into three major groups followed by a hybrid category that is made up of a combination of the three major approaches.
M. Mirmozafari +6 more
semanticscholar +1 more source
Real-time power system dynamic security assessment based on advanced feature selection for decision tree classifiers [PDF]
, 2017 This paper proposed a novel algorithm based on advanced feature selection technique for decision tree (DT) classifier to assess the dynamic security in power system.
Al-Gubri, Qusay, Mohd Ariff, Mohd Aifaa
core +1 more source
IET Microwaves, Antennas & Propagation, 2020 : This study presents the design process and preliminary results of a 1.8-m reflectarray antenna able to generate a complete multi-spot coverage for transmission from a geostationary satellite operating in Ka-band (18.2–20.2 GHz).
Daniel Martinez-de-Rioja +4 more
semanticscholar +1 more source
Dual-Polarization Ku-Band Compact Spaceborne Antenna Based on Dual-Reflectarray Optics
Sensors, 2018 This article demonstrated an accurate analysis technique for dual-reflectarray antennas that take into account the angle of incidence of the impinging electric field on the main reflectarray cells. The reflected field on the sub and the main reflectarray
Carolina Tienda +3 more
doaj +1 more source
IEEE Access, 2020 In this study, a W-band reflectarray antenna is designed with the characteristics of low phase sensitivity and wideband. Low phase sensitivity is achieved by subdividing the unit cell variation method into five steps. While designing a unit cell with low
Eun-Cheol Choi, S. Nam
semanticscholar +1 more source
A Review on the Development of Spaceborne Membrane Antennas
Space: Science & Technology, 2022 The membrane antenna technology is a very promising approach to obtain large aperture with light weight and low stowed volume. In the past decades, extensive studies have been carried out on active and passive membrane antennas.
Ming-Jian Li +4 more
doaj +1 more source
Implementation of an Innovative Method to Design Reflectarray Antennas
International Journal of Antennas and Propagation, 2012 A novel computed aided technique for designing reflectarray antennas is presented. The developed approach automatically generates the geometrical model of reflectarray antennas taking into account some input parameters, such as, the unit cell type and ...
Abdelhamid Tayebi +3 more
doaj +1 more source
Hardware-Efficient Hybrid Precoding for Millimeter Wave Systems With Multi-Feed Reflectarrays
IEEE Access, 2018 Current hybrid precoding schemes for large-scale antenna array-aided millimeter wave (mmWave) wireless systems adopt either full-connected or sub-connected architectures based on phased array antennas (PAAs).
Zhengyi Zhou +3 more
doaj +1 more source
High efficiency near diffraction-limited mid-infrared flat lenses based on metasurface reflectarrays [PDF]
, 2016 A limiting factor in the development of mid-infrared optics is the lack of abundant materials that are transparent, low cost, lightweight, and easy to machine. In this paper, we demonstrate a metasurface device that circumvents these limitations.
Aieta, Francesco +11 more
core +3 more sources