Single-layer broadband planar antenna using ultrathin high-efficiency focusing metasurfaces

Hou Hai-Sheng, Wang Guang-Ming^†, Li Hai-Peng, Guo Wen-Long, Li Tang-jing, Cai Tong^‡

(color online) Simulated and measured farfield radiation patterns at 18 GHz: (a) xoz-plane, (b) yoz-plane.