A highly efficient low‐cost reflective anisotropic metasurface for linear to linearly cross‐ and circular‐polarization conversion
Mudassir Murtaza, Aamir Rashid, Farooq A. Tahir
Abstract
Abstract In this research, a highly efficient single‐layer reflective polarization converter based on anisotropic metasurface is proposed for microwave communications. The periodic design works in a dual‐operation mode as a half‐wave plate (cross‐polarizer) and a quarter‐wave plate (circular‐polarizer) over multiple frequency bands. The unit‐cell is comprised of coupled D‐shaped resonators printed on a low‐cost FR‐4 substrate offering cross‐polarization conversion (above −3 dB) over three frequency bands (6.45–6.87, 9.94–11.34, and 15.99–18.60 GHz) with cross conversion efficiency higher than 90%. Moreover, the proposed metasurface can also work as a linear to circular polarizer over three bands (6.0–6.25, 7.35–9.05, and 12.28–15.18 GHz). The design is further shown to be angularly stable for incidence angles up to 30°. The proposed design has been validated experimentally after fabrication.