Fig. 1. Schematic of metasurface unit. (a) Front view; (b) side view

Fig. 2. Reflection principle of metasurface. (a) Schematic of electromagnetic wave components along v and u; (b) reflection amplitudes and phase differences of Rv and Ru

Fig. 3. Simulation results of metasurface. (a) Reflection coefficient; (b) PCR

Fig. 4. Surface current distributions of metasurface unit at different resonance frequencies. (a) 12.3 GHz; (b) 17.1 GHz

Fig. 5. Equivalent circuit and impedance of metasurface. (a) Analysis diagram of equivalent circuit and simplified equivalent circuit; (b) impedance of equivalent circuit versus frequency

Fig. 6. Physical map and photo of experimental environment. (a) Photo of metasurface sample; (b) photo of experimental environment

Fig. 7. Comparison between simulation results and experimental results. (a) Reflection coefficient; (b) PCR