Abstract
In this work, a dual-polarized lens antenna system based on isotropic metasurfaces is proposed for 12 GHz applications. The metasurface lens is composed of 0.24 wavelength unit cells with metallic strips etched on top and bottom sides of the unit cell, and a cross-slots metallic layer in the middle as the ground. The multimode resonances in the unit cell can realize a large phase shift (covering $0^{\circ} \sim 360^{\circ})$ and the maximum transmission efficiency above 80%. The feed antenna at the focal point of the lens is a broadband dual-polarized microstrip antenna. The simulated results demonstrate that the dual-polarized lens antenna system can realize the input ports isolation of more than 25 dB, and the gain of more than 16 dB.
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