  We numerically demonstrate a new type of waveform-selective metasurface that
senses the difference in incoming waveforms or pulse widths at the same
frequency. Importantly, the proposed structure contains precise rectifier
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 amplifiers. As a result, a waveform-selective 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 field of wireless communications to control different small signals
at the same frequency.
