Fig. 5: Signal relay enabled by intelligent metasurfaces.
From: Progress on intelligent metasurfaces for signal relay, transmitter, and processor
a Schematic illustration of signal relay. b Perception-decision-execution intelligent metasurfaces for wireless channel management98. c Tunable impedance surface in disordered cavity99. d Optimal channel diversity in disorder97. e Mechanical-actuating metasurfaces98. f Tunable metasurfaces embedded with PIN diodes94. g Conformal reconfigurable metasurface100. b, e Reproduced with permission from ref. 98, Copyright © 2022, American Association for the Advancement of Science. c Reproduced with permission from ref. 99, Copyright © 2016, American Physical Society. d Reproduced with permission from ref. 97, Copyright © 2019, Springer Nature. f Reproduced with permission from ref. 94, Copyright © 2016, Huanhuan Yang et al. g Reproduced with permission from ref. 100, Copyright © 2023, Erda Wen et al
