SURFACE ACOUSTIC WAVE DEVICE

摘要

IMPROVED SURFACE ACOUSTIC WAVE DEVICE A surface acoustic wave filter is provided having an input and an output transducer, each consisting of a pair of comb-like structures, wherein the electrodes or teeth are interleaved and are varied in length in accordance with a weighting function determined by the Fourier transformation of the respective transducer characteristic frequency response so as to each produce a pair of frequency passbands symmetrical about their characteristic frequency The latter frequency passband of the input transducer has the same passband center frequency as the first frequency passband of the output transduoer The coincident passband of said input and output transducers resulting in an output from the output tranducer having the center frequency of the coincident passbands.