Use of acoustic transducers as generalised electrical circuit elements

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Use of acoustic transducers as generalised electrical circuit elements

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© The Institution of Electrical Engineers
Published

An entirely novel approach to SAW device design is described in which individual transducers are used as generalised electrical circuit components. The principles are well illustrated through the performance of a prototype lowpass filter incorporating a sharp 40 dB notch near 130 MHz.

Inspec keywords: surface acoustic wave devices; ultrasonic transducers; passive filters

Other keywords: SAW device; generalised electrical circuit elements; lowpass filter; acoustic transducers; sharp 40 dB notch

Subjects: Sonic and ultrasonic transducers and sensors; Acoustic wave devices; Passive filters and other passive networks

References

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      • P.R. Geffe . (1964) , Simplified modern filter design.
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      • H. Matthews . (1977) , Surface wave filters.
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      • W.R. Smith , H.M. Gerard , J.H. Collins , T.M. Reeder , H.J. Shaw . Design of surface wave delay lines with interdigital transducers. IEEE Trans. , 865 - 873
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      • A.L. Nalamwar , M. Epstein . Immitance characteristics of acoustic surface wave transducers. Proc. IEEE , 336 - 337
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      • C.S. Hartman , D.T. Bell , R.C. Rosenfeld . Impulse model design of acoustic surface-wave filter. IEEE Trans. , 80 - 93
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      • Pollock, W., Schofiield, J., Milsom, R.F., Murray, R.J., Flinn, I.: `Low-loss SAW filter using single-phase IDTs with no external tuning', Proc. IEEE ultrasonics symp., 1983, p. 87–92.
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      • M.F. Lewis , C.L. West , J.M. Deacon , R.F. Humphreys . Recent developments in SAW devices. IEE Proc. A , 186 - 215
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      • Lewis, M.F.: `Surface skimming bulk waves, SSBW', Proc. IEEE ultrasonics symp., 1977, p. 744–752.
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