Acoustic wave filter

摘要: A body of piezoelectric material propagates acoustic surface waves. central transducer is coupled to a the interact with those Spaced on same generally symmetrically individually respect that are pair outer transducers. Each three transducers includes interleaved combs conductive electrodes spaced apart effectively by one-half approximate wavelength The mutually arranged, relative transducers, such waves propagating between and one create electrical signals additively related in phase created other In several illustrated species, specific arrangement different varies dependence upon number individual comb choice as series or parallel interconnection