Optimal design of transmitarray antennas via low-cost surrogate modelling [PDF]
Scientific Reports, 2023 Over the recent years, reflectarrays and transmitarrays have been drawing a considerable attention due to their attractive features, including a possibility of realizing high gain and pencil-like radiation patterns without the employment of complex ...
Mehmet A. Belen +4 more
doaj +2 more sources
Polarization Diversity and Adaptive Beamsteering for 5G Reflectarrays: A Review [PDF]
IEEE Access, 2018 The growing demands of advanced future communication technologies require investigating the possible enhancement in the current features of a reflectarray antenna.
Muhammad Hashim Dahri +5 more
doaj +4 more sources
Novel phase distributions for large electronically beam-scanning reflectarrays [PDF]
Scientific Reports, 2021 In this paper, the hybrid combination of genetic algorithm and particle swarm optimization (GAPSO) is used to optimize the phase distribution (PD) of beam-scanning reflectarray. The GAPSO takes advantage of both conventional algorithms and it could cover
Ahad Sheikholeslami, Zahra Atlasbaf
doaj +2 more sources
Analysis and design of terahertz reflectarrays based on graphene cell clusters [PDF]
Scientific Reports, 2022 In this paper, the graphene cell-cluster is introduced, which is composed of an array of identical unit-cells placed in a geometrical configuration. Such graphene cell-clusters are then used for the realization of a reflectarray.
Parinaz Hosseini, Homayoon Oraizi
doaj +2 more sources
Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field [PDF]
Scientific Reports, 2017 Orbital angular momentum (OAM) mode combining and canceling in the near-field was investigated using a Cassegrain dual-reflectarray antenna composed of multiple microstrip patches on the main and sub-reflectarrays.
Woo Jin Byun +2 more
doaj +2 more sources
A simple and fast technique to analyze accurately reconfigurable reflectarrays [PDF]
, 2012 International audienceA simple and fast technique is proposed and validated to analyze reconfigurable reflectarrays. This technique takes into account mutual coupling effects between active cells within the array.
Martinaud, Jean-Paul +4 more
core +9 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
Reflectarrays and metasurface reflectors as diffraction gratings [PDF]
, 2022 Reconfigurable reflectors have a significant potential in future telecommunication systems, and approaches to the design and realization of full and tunable reflection control are now actively studied.
Liu, Fu +2 more
core +2 more sources
A Dual Circularly-Polarized Multilayer Reflective Surface Based on Loaded Ring Slots
IEEE Access, 2021 In this paper, a dual circularly-polarized multilayer reflective surface (MRS) based on loaded ring-slots for reflectarray applications is presented. The MRS comprises a wideband multilayer circular polarizer cascaded with a multilayer reflective screen ...
Lourdes Martinez-Lopez +4 more
doaj +1 more source
Some preliminary results on conformal Reflectarrays [PDF]
, 2015 In this paper, the characteristics of Reflectarray Antennas printed on convex curved surfaces are analyzed. In particular, results on the radiation performances of different Reflectarrays designed to be mounted on cylinders with different radii of ...
Yang Fan +4 more
core +2 more sources