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 realized gain with/without PGMS from 15 GHz to 22 GHz.