Fig. 2: Design of the dual-band metasurface and the simulation results.
From: Adaptive wireless-powered network based on CNN near-field positioning by a dual-band metasurface
a Side views of two frequencies meta-atoms. b The phase responses under ON and OFF states of low-band meta-atoms, whose center frequency is 5.8 GHz. c The phase responses under ON and OFF states of high-band meta-atoms, whose center frequency is 11.6 GHz. d Calculated three different coding matrixes on metasurface for power focusing at (0, 0, 50)cm, (0, −10, 50) cm, and (−10, 0, 50) cm. e Simulated electric field distributions at z = 50 cm, they present different focal spots.
