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High-performance SAW convolver using 3-phase unidirectional transducers

High-performance SAW convolver using 3-phase unidirectional transducers

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The development of a new SAW convolver with a bandwidth 45 MHz, interaction time 12 μs and which employs 3-phase unidirectional transducers is discussed. The resulting device has high efficiency (−58 dBm) and displays good self-convolution suppression. Only single-stage fabrication is required.

Inspec keywords: transducers; surface acoustic wave devices

Other keywords: self-convolution suppression; SAW convolver; 3-phase unidirectional transducers; 45 MHz

Subjects: Sensing devices and transducers; Acoustic wave devices; Transduction; devices for the generation and reproduction of sound

References

    1. 1)
      • Brown, R.B.: `Electrical matching of unidirectional surface wave devices', Proc. IEEE MTTS International Microwave Symposium, 1975, p. 297–299.
    2. 2)
      • Motz, M.D., Chambers, J., Mason, I.M.: `Suppression of spurious signals in a degenerate SAW convolver', Proc. IEEE Ultrasonics Symposium, 1973, p. 152–154.
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      • H. Gauntier , C. Maerfeld . (1980) , Wideband elastic convolvers.
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      • K. Yamanouchi , F.M. Nyffeler , K. Shibayama . (1975) , Low insertion loss, acoustic surface wave filter using group-type unidirectional interdigital transducer.
    5. 5)
      • F.G. Marshall , E.G.S. Paige , A.S. Young . New unidirectional transducer and broadband reflector of SAW. Electron. Lett. , 638 - 640
    6. 6)
      • Lewis, M.F., West, C.L.: `High performance SAW convolvers', Proc. IEEE Ultrasonics Symposium, 1981, to be published.
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      • D.P. Morgan , D.H. Warne , P.N. Naish , D.R. Selviah . , Monolithic SAW convolvers using chirp transforms.
    8. 8)
      • Y. Shimizu , T. Hata . Unidirectional SAW transducer by meandering and interdigital electrodes. Trans. Inst. Electron. & Commun. Eng. Jpn. Sect. E , 557 - 558
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      • I. Yao . , High performance elastic convolvers with parabolic horns.
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