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Title: A Reflectarray Antenna Using Hexagonal Lattice With Enhanced Beam Steering Capability
Authors: Kiriş, Orçun
Topallı, Kağan
Ünlü, Mehmet
Keywords: Reflectarray
antenna array
hexagonal lattice
satellite communication
beam steering
Issue Date: 2019
Publisher:  Institute of Electrical and Electronics Engineers Inc.
Source: Kiris, O., Topalli, K., and Unlu, M. (2019). A Reflectarray Antenna Using Hexagonal Lattice With Enhanced Beam Steering Capability. IEEE Access, 7, 45526-45532.
Abstract: This paper presents a novel reflectarray antenna with enhanced beam steering capability. The reflectarray antenna is based on the hexagonal distribution of the unit cells on the antenna surface. The hexagonal topology changes the angle between the principal axes of the unit cell distribution, preventing the formation of the grating lobe, and improving the beam steering capability of the reflectarray antenna. To verify the proposed idea, two different sets of reflectarray antennas, which includes square and hexagonal lattice topologies with inter-element spacings of 0.52 lambda and 0.6 lambda, have been designed, fabricated, and measured at 8.23 GHz. The measurements of the all fabricated reflectarray antennas are in very good agreement with the simulations, and the comparison of the square and hexagonal topologies show that the beam steering capability can be improved by 50% for 0.6 lambda inter-element spacing by using a hexagonal topology. This improvement shows that a simple modification in the array configuration can be a viable solution for satellite and 5G communication applications that require increased beam steering capability.
ISSN: 2169-3536
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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