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Results on low-loss wideband ultrasonic transducers for non-invasive medical application

Results on low-loss wideband ultrasonic transducers for non-invasive medical application

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A new design for disc transducers with good efficiency and large bandwidth is presented here. The design method is based on the use of quarter-wave matching layers between the piezoelectric ceramic and the load, and the use of a quarter-wave unmatching layer between the same ceramic and its high acoustic impedance backing. Experimental and theoretical results are presented.

References

    1. 1)
      • G. Kossof . The effects of backing and matching on the performance of piezoelectric ceramic transducers. IEEE Trans. , 20 - 30
    2. 2)
      • J.H. Goll , B.A. Auld . Multilayer impedance matching schemes for broadbanding of water loaded piezoelectric transducers and high Q electric resonators. IEEE Trans. , 1
    3. 3)
      • C. de Silets , J. Fraser , G.S. Kino . The design of efficient broadband piezoelectric transducers. IEEE Trans.
    4. 4)
      • W.P. Mason . (1948) , Electromechanical transducers and wave filters.
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