High-efficiency wideband flat focusing reflector mediated by metasurfaces

Yu Ji-Bao^a), Ma Hua†^a), Wang Jia-Fu^a), Li Yong-Feng^a), Feng Ming-De^a),^b), Qu Shao-Bo‡^a)

Distributions of the y -component of the reflection electric field at (a) 11.0 GHz, (b) 13.0 GHz, (c) 15.0 GHz, (d) 17.0 GHz, (e) 19.0 GHz, and (f) 21.0 GHz, respectively.