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Broadband dual‐polarized lens antenna based on multimode Huygens’ surfaces

In this article, a dual‐polarized lens antenna system based on isotropic Huygens’ surfaces is proposed for 12 GHz applications. The surface lens is composed of subwavelength metallic patches etched on a 2‐layer dielectric substrate, which can realize high transmission efficiency and large phase shift (covering 0°–360°) over a wide bandwidth (11.0–13.0 GHz). The multimode resonances in the unit cell are detailed analyzed. The feed antenna at the focal point of the lens is a broadband dual‐polarized microstrip antenna. Both the simulated and measured 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 17.0 dB.