Multiband and multifunctional polarization converter using an asymmetric metasurface

A compact and asymmetric multi-band reflective polarization converter metasurface has been offered in this paper. The proposed simple converter can effectively convert an incident linearly polarized EM wave to its orthogonal counterpart and circular polarized waves (RHCP and LHCP) at two frequency b...

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Bibliographic Details
Published in:Scientific reports 2021-04, Vol.11 (1), p.9306-9306, Article 9306
Main Authors: Pouyanfar, Negin, Nourinia, Javad, Ghobadi, Changiz
Format: Article
Language:English
Subjects:
639/166
639/166/987
Bandwidths
Conversion
Humanities and Social Sciences
multidisciplinary
Polarization
Radio communications
Science
Science (multidisciplinary)
Software
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Summary:A compact and asymmetric multi-band reflective polarization converter metasurface has been offered in this paper. The proposed simple converter can effectively convert an incident linearly polarized EM wave to its orthogonal counterpart and circular polarized waves (RHCP and LHCP) at two frequency bands. The design consists of a square with two curves on the top right and lower left corners and a square Split Ring Resonator (SRR) responsible for linear-to-linear and linear-to-circular polarization conversions, respectively. The simulated results show that the converter successfully transforms a y -polarized incident wave to its orthogonal counterpart in a frequency range of 15.5–16.5 GHz with unity conversion at 16 GHz and circularly-polarized (RHCP) wave at 13 GHz and (LHCP) at 18 GHz, verified through the fabricated and measured sample. Wide angular stability up to 60° oblique incidence along with high efficiency reveals the good applicability of the structure. Moreover, the root cause of the cross-polarization conversion has been analyzed and confirmed through Bi-Mode Foster equivalent circuit and surface current distribution as well. Finally, a fabricated prototype is tested to validate the simulated results through measurement.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-88771-x