Interdigital transducers on a piezoelectric thin-film for signal compression

A system comprising:

• an antenna to receive an input electrical signal that varies in frequency over time;
• and
• a passive voltage gain device, coupled with the antenna, the passive voltage gain device comprising:
• a piezoelectric thin-film suspended above a carrier substrate, the piezoelectric thin-film having a horizontal axis orientated along a length of the piezoelectric thin-film and a center axis orientated along a width of the piezoelectric thin-film, wherein the horizontal axis is perpendicular to the center axis, and wherein the piezoelectric thin-film comprises a first side and a second side with respect to the center axis;
• an input interdigital transducer (IDT) comprising first interdigitated electrodes disposed at different locations along the horizontal axis and on the first side of the piezoelectric thin-film, wherein each opposing pair of the first interdigitated electrodes is to selectively transduce a particular frequency range of the input electrical signal into an acoustic wave of a laterally vibrating mode based on a pitch between electrodes of the respective opposing pair, and wherein the pitches of opposing pairs of the first interdigitated electrodes vary along the horizontal axis;
• and
• an output IDT comprising second interdigitated electrodes disposed at different locations along the horizontal axis and on the second side of the piezoelectric thin-film, wherein each opposing pair of the second interdigitated electrodes corresponds to a respective opposing pair of the first interdigitated electrodes of equal pitch, wherein each opposing pair of the second interdigitated electrodes is to convert the acoustic wave transduced by the respective opposing pair of the first interdigitated electrodes into an output signal of a corresponding frequency range, and wherein a plurality of frequency components of the output signals concurrently interfere to form a compressed pulse.