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) (a) Simulated model for planar antenna; and 3D radiation patterns at (b) 15 GHz, (c) 18 GHz, (d) 22 GHz.