Multi-Band Waveform-Selective Metasurfaces and Their Application

In recent years, circuit-based metasurfaces containing diodes were reported to be capable of sensing a difference in different waves even at the same frequency depending on their waveforms or pulse widths. In this study, we demonstrate that such waveform-selective metasurfaces can operate at more than one frequency band. Interestingly, a proposed structure shows not only multiband waveform-selective transmission but also an unusual response to more effectively transmit a continuous signal if the oscillation frequency is regularly switched. Potentially, our study provides a higher degree of freedom to design wireless communication environments.