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Review Article

Space-Time-Coding Digital Metasurfaces: Principles and Applications

Figure 5

Programmable nonreciprocal effect and frequency conversion. Reproduced from [113]. (a) Numerically calculated scattering patterns at various frequencies for the forward reflection scenario (excited from Port 1 at and ) and time-reversal reflection scenario (excited from Port 2 at and ), respectively. (b) Numerically calculated scattering patterns at various frequencies for the forward reflection scenario (excited from Port 1 at and ) and time-reversal reflection scenario (excited from Port 2 at and ), respectively. (c) Measured scattering patterns at various frequencies for the forward and time-reversal reflection scenarios, respectively.