Ultra-wideband circular polarization-maintaining reflection realized by an anisotropic metasurface

Abstract

In this paper, an ultra-wideband circular polarization (CP) maintaining reflector is proposed based on an anisotropic metasurface, which is an orthogonal anisotropic structure with a pair of symmetrical axes u and v perpendicular to each other. The simulated results show that the reflector can realized CP-maintaining reflection under both right-handed and left-handed CP (RHCP and LHCP) incidences in the frequency band between 8.79 and 27.09 GHz, the fractional bandwidth is up to 102%. In addition, the physical mechanism of the CP-maintaining reflection has been analyzed in detail, and one useful formula has been derived, which can be used to calculate the cross- and co-polarization reflection coefficients under CP incidence according to the phase differences between the two reflection coefficients under u and v-polarized incidences. Finally, one effective experimental validation was carried out.

KEYWORDS:

• Metasurface
• polarization converter
• circular polarization (CP)
• Pancharatnam-Berry phase

Acknowledgments

This work was supported by Natural Science Foundation of Shanxi Province, China (2019JM-077, 2018JM-6098, 2018JM-6075), Shanxi Key R&D Project (2019GY-055), Scientific Research Program Funded by Shanxi Provincial Education Department (18JK1195), Key R&D Plan Project of Shanxi Provincial Science & Technology Department (2018ZDXM-NY-014).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by Natural Science Foundation of Shaanxi Province, China [grant numbers 2019JM-077, 2018JM-6098, 2018JM-6075], Shaanxi Key R&D Project [grant number 2019GY-055], Scientific Research Program Funded by Shaanxi Provincial Education Department [grant number 18JK1195], Key R&D Plan Project of Shaanxi Provincial Science & Technology Department [grant number 2018ZDXM-NY-014].