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A Multi-Functional Metasurface for Polarization Transformation Applications

A multifunctional metasurface performing both linear-linear (cross) and linear-circular polarization conversion is proposed and analyzed. The unit cell of the metasurface comprises of double head umbrella shape. The cross polarization conversion is achieved in two frequency bands of 7.5-7.99 GHz and 14.1-24 GHz. The polarization conversion efficiency is more than 90% over both frequency bands. The metasurface achieves circular polarization conversion within the frequency ranges of 7.15-7.3 GHz, 8.5-12.06 GHz and 27.6-30.85 GHz. Moreover, the proposed metasurface is angularly stable against oblique incidences of upto 45°. The proposed multifunctional structure is suitable for many applications like satellite communications, tracking and navigation systems.