摘要：We numerically demonstrate a new type of waveform-selective metasurface that senses the diference
in incoming waveforms or pulse widths at the same frequency. Importantly, the proposed structure
contains precise rectifer circuits that, compared to ordinary schottky diodes used within old types
of structures, rectify induced electric charges at a markedly reduced input power level depending on
several design parameters but mostly on the gain of operational amplifers. As a result, a waveformselective absorbing mechanism related to this turn-on voltage appears even with a limited signal
strength that is comparable to realistic wireless signal levels. In addition, the proposed structure
exhibits a noticeably wide dynamic range from −30 to 6 dBm, compared to a conventional structure
that operated only around 0 dBm. Thus, our study opens up the door to apply the concept of waveform
selectivity to a more practical feld of wireless communications to control diferent small signals at the
same frequency.
