This paper presents a reconfigurable reflectarray antenna (RRA) that uses a metasurface to achieve circular polarization-switching capability. A method for switching to right-handed circular polarization (RHCP) or left-handed circular polarization (LHCP) by setting the reference phases of the x- and y-polarized unit cells as in-phase or out-of-phase is proposed. In addition, an optimization method for improving the axial ratio by shifting the reference phases of the two orthogonal polarizations is presented. Simulation and measurements are detailed, verifying the beam steering of the proposed RRA to be as high as 45° in the xz and yz planes.
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Kim et al. (2024) studied this question.
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