Wideband and high efficiency reflective polarization rotator based on metasurface

Qi Zheng, Chenjiang Guo, Haixiong Li and Jun Ding

Journal of Electromagnetic Waves and Applications, 2018, vol. 32, issue 3, 265-273

Abstract: A wideband and high efficiency reflective polarization rotator (PR) based on metasurface is presented. The unit cell of the PR consisting of two oblique symmetry triangle split rings and simulated results show the PR has more than 90% polarization conversion efficiency from 9.24 to 17.64 GHz (a relative bandwidth of 62.50%) under normal incidence. The broad polarization conversion bandwidth and high efficiency results from multiple plasmon resonances and nearly 100% polarization conversion is obtained at three plasmon resonances. The mechanism of the proposed PR is analyzed by surface current distributions. Electric and magnetic resonances generate broad polarization conversion bandwidth and high polarization conversion ratio within the operating band. In addition, we analyze the polarization states of the PR unit numerically based on the reflected fields, which serves as theoretical predictions of polarization conversion. To verify the simulation results and analysis, a sample was fabricated and measured. The measured results are in good agreement with simulated results and numerical analysis.

Date: 2018
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DOI: 10.1080/09205071.2017.1377640

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