Metasurface-based broadband linear polarization converter with broad angular stability for X-band applications

An efficient broadband metasurface-based polarization converter is investigated in this communication. The proposed embodiment works in the reflection mode. It can efficiently convert the x-polarized fields to their y-polarized counterpart and vice versa, with a good oblique incidence of up to 50 degrees over the entire X-band. The design portrays a good polarization conversion ratio of up to 98% for normal incidence and is more than 70% considering the cases of oblique incidences. A prototype is fabricated to confirm the operation of the proposed design. Good agreement between the simulation and experimental results is observed. Ryy (co-component: y-polarized transmission and y-polarized reception) is below -10 dB, and the Rxy (cross-component: y-polarized transmission and x-polarized reception) is above - 3 dB over the entire X-band.