FIELD: electrical engineering.
SUBSTANCE: invention relates to piezoelectric devices, in particular to passive marks on surface acoustic waves for radio frequency identification systems. Core: the device consists of an antenna, a piezoelectric substrate and at least two acoustic channels with different ranges of working frequencies. Each acoustic channel is located onto the piezoelectric substrate and consists of an IDT and at least one reflector. IDT of all acoustic channels are interconnected in series to form with the antenna a single microstrip line.
EFFECT: technical result is prevention of distortion of a code signal generated by the mark and reduced signal losses due to the series connection of interdigital transducers (IDT) of the different acoustic channels and the antenna into a single microstrip line.
4 cl, 4 dwg
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