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 electric field distribution at 15 GHz in (a), (b) yoz-plane and (c), (d) xoz-plane for the Vivaldi antenna (a), (c) without and with (b), (d) the PGMS.