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Applied physics

, Volume 19, Issue 2, pp 195–198 | Cite as

A unidirectional three-phase interdigital transducer for acoustic imaging in fluids

Contributed Papers
  • 35 Downloads

Abstract

A new type of unidirectional interdigital transducer for acoustic imaging is presented. The tranducer consists of three electrode groups deposited onto a piezoelectric ceramic plate and can be constructed by using three fingers per wavelength to be driven from a three-phase source.

All radiation, in the forward direction, from each section of the transducer constructively interferes at a focal point in water. On the other hand, the sound wave beam radiated in the other direction is small. The radiation direction is controllable by changing the carrier frequency.

PACS

43.88 43.35 

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References

  1. 1.
    K.Toda, Y.Murata: Appl. Phys. Lett.31, 144 (1977)CrossRefADSGoogle Scholar
  2. 2.
    C.S.Hartmann, W.S.Jones, H.Vollers: IEEE Trans. SU-19, 378 (1972)Google Scholar
  3. 3.
    K.Toda: Appl. Phys.10, 161 (1976)CrossRefADSGoogle Scholar

Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • K. Toda
    • 1
  1. 1.Department of Electrical EngineeringNational Defense AcademyYokosukaJapan

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