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) Structure of the element and the simulated setup: (a) top view, (b) perspective view. The parameters are d = 0.3 mm, p = 6 mm, h = 2 mm, and a = 1.8−5 mm.