Results 1 to 10 of about 332 (159)
Isolation Improvement in Reflectarray Antenna-Based FMCW Radar Systems [PDF]
Sensors, 2022 This paper presents an optimization of reflectarray-based RF sensors for detecting UAV and human presence. Our previous human detection radar system adapted a center-fed reflectarray antenna to a commercially available radar system, successfully ...
Hesham Yamani, Jihwan Yoon
doaj +2 more sources
Investigation of losses on directivity improvement in the graphene reflectarray design [PDF]
Scientific ReportsThe surface-wave generation in microstrip antennas and reflectarray antennas composed of microstrip patches is an unavoidable phenomenon. The incidence of surface-waves on discontinuities and edges results in side-lobe generation and main beam ...
Parinaz Hosseini, Homayoon Oraizi
doaj +2 more sources
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.
Mirhamed Mirmozafari +6 more
doaj +3 more sources
Neural Network Characterization of Reflectarray Antennas
International Journal of Antennas and Propagation, 2012 An efficient artificial neural network (ANN) approach for the modeling of reflectarray elementary components is introduced to improve the numerical efficiency of the different phases of the antenna design and optimization procedure, without loss in ...
Angelo Freni +2 more
doaj +2 more sources
Experimental Investigation of Reflectarray Antennas for High-Power Microwave Applications [PDF]
MicromachinesThe power capacity of reflectarray antennas (RAs) is investigated through full-wave simulations and high-power microwave (HPM) experiments in this paper. In order to illustrate the results in detail, two RA elements are designed.
Jianing Zhao +10 more
doaj +2 more sources
Reflectarray Antennas: Analysis and Synthesis Techniques [PDF]
International Journal of Antennas and Propagation, 2012 Sandra Costanzo
doaj +2 more sources
Analysis of a Dual-Reflectarray Antenna
IET Microwaves, Antennas and Propagation, 2011 A modular technique for the analysis of a dual-reflectarray antenna (DRA) configuration is presented. The proposed analysis method has been used to design a DRA that emulates previous dual-reflector antennas in Ku- and W-bands including a reflectarray as a sub-reflector.
Giovanni Toso +2 more
exaly +2 more sources
Recent Advances in Transparent Reflectarray Antennas
IEEE AccessTransparent Reflectarray Antennas (TRAs) have emerged as a promising solution for next-generation communication systems requiring both electromagnetic performance and optical transparency. This review focuses on a detailed latest work on unit cell design
Altaf Ahmed Mugheri +7 more
doaj +3 more sources
IEEE Access, 2021 Membrane reflectarray antennas with flexible support structures realize low weight and low stowage volume. However, deformation of the reflectarray membrane generally degrades antenna gain. We propose electrical misalignment compensation for 5.8-GHz-band
Keisuke Omoto +2 more
doaj +1 more source
Increasing bandwidth of full-metal slot reflectarray antennas [PDF]
ITM Web of Conferences, 2019 Results of theoretical and experimental investigations of full-metal slot reflectarray antennas with increased bandwidth are presented. Bandwidth increasing is achieved by means of certain sizes choice for each reflective element so that the phase-error ...
Sugak Mikhail +4 more
doaj +1 more source