Metamaterial Based Anisotropic Metasurface for Broadband Cross Polarization Conversion

This paper presents ultra-wideband polarization conversion metasurface(MS) in microwave regime. Metasurfaces with two different types of unit cells have been designed and simulated. Metasurface MS
1
consisting of two-dimensional Rectangular split-ring-resonators(SRRs) and MS
2
consisting of two-dimensional circular SRRs. Both the metasurfaces are etched on top of a FR4 dielectric substrate having ground with a metallic covering. The proposed metasurfaces have wide polarization conversion bandwidth due to multiple plasmon resonances. MS
1
converts an linearly polarized wave into its corresponding orthogonal polarization while MS
2
converts both linear and circular polarization waves into their corresponding orthogonal polarizations. It is also observed that MS
2
is more compact and achieves wide bandwidth than MS
1
. The proposed metasurface would be promising in applications for polarization control devices.