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Design of a wide band metasurface as a linear to circular polarization converter
Date
2017-10-30
Author
ALTINTAŞ, OLCAY
ÜNAL, EMİN
AKGÖL, OĞUZHAN
KARAASLAN, MUHARREM
KARADAĞ, FARUK
Sabah, Cumali
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In this paper, we present a wide band metasurface (MS) polarization converter which converts a linearly polarized signal to a right-handed or left-handed circularly polarized signal both numerically and experimentally. The unit cell of MS has three nested rectangular resonators which have two metallic patches at its crossed corners. The simulated and measured results are achieved by a commercial full wave EM simulator and a vector network analyzer with two horn antennas in microwave frequency regime. The S-parameters are obtained for co-polarized and cross-polarized responses and axial ratio is evaluated by the division of these two responses. The axial ratio is kept below 3 dB for efficient polarization converting activity. Correspondingly, axial ratio bandwidth of 800 MHz is obtained. The proposed MS can easily be fabricated and integrated into many desired applications by proper configurations depending on the application area and frequencies. The proposed MS has potential such as polarization converter with 0.75 efficiency in WiMAX frequency band, PMC-like treatment with a phase reflection around 0 degrees and reflection coefficient nearly unity at some frequency points. Beside this, the three nested rectangle MSs also provide opportunities to design low profile antennas with conversion characteristics.
Subject Keywords
Metasurface
,
Polarization conversion
,
Axial ratio
,
Axial ratio bandwidth
URI
https://hdl.handle.net/11511/68288
Journal
MODERN PHYSICS LETTERS B
DOI
https://doi.org/10.1142/s0217984917502748
Collections
Engineering, Article
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Design of metasurface polarization converter from linearly polarized signal to circularly polarized signal
AKGÖL, OĞUZHAN; ÜNAL, EMİN; ALTINTAŞ, OLCAY; KARAASLAN, MUHARREM; KARADAĞ, FARUK; Sabah, Cumali (Elsevier BV, 2018-01-01)
In this study, we both numerically and experimentally present a metasurface (MS) polarization converter to transform linearly polarized signal into circularly polarized one. The unit cell consists of two rectangular metallic patches placed at the crossed corners of rectangularly arranged inclusions. The results of a full-wave Electromagnetic (EM) simulator are compared to those of free space measurement using two horn antenna at microwave frequency regime. For a linearly polarized antenna, the s-parameters ...
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O. ALTINTAŞ, E. ÜNAL, O. AKGÖL, M. KARAASLAN, F. KARADAĞ, and C. Sabah, “Design of a wide band metasurface as a linear to circular polarization converter,”
MODERN PHYSICS LETTERS B
, pp. 0–0, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/68288.