Multilayer ZnO Acoustic Transducers at Millimeter-Wave Frequencies

Hadimioglu, B.; Comb, L. J. La; Goddard, L.C.; Khuri‐Yakub, Butrus T.; Quate, C. F.

doi:10.1109/ultsym.1987.199053

Cited by 3 publications

References 7 publications

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Apodization of multilayer bulk-wave transducers

Akcakaya

Adler

Farnell

1989

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Recent experiments have demonstrated the use of superlattice transducers for bulk acoustic waves in the gigahertz frequency range. The transducers consisted of multilayers of ZnO or LiNbO(3) with alternating crystal orientations or polarizations. A procedure for calculating the electromechanical characteristics of general multilayer transducers in which the individual layers are anisotropic and piezoelectric and have arbitrary crystal orientation is described. The algorithm used is numerically stable and easily implemented for use on a personal computer using commercial software. A network model is also derived to provide both an approximate analysis of multilayer transducer performance and an insight into synthesis procedures. Examples are used to compare the two approaches and illustrate an initial design procedure for broadband transducers.

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Apodization of multilayer bulk-wave transducers

Akcakaya

Adler

Farnell

1989

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Anisotropic superlattice transducers: characteristics and models

Akcakaya

Adler²,

Farnell³

IEEE 1988 Ultrasonics Symposium Proceedings.

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Recent experiments have demonstrated the practicability of superlattice transducers for bulk acoustic waves in the high GHz frequency range. The transducers consisted of multilayers of ZnO with alternating crystal orientations. This paper describes a procedure for calculating the electromechanical characteristics of general multilayer transducers in which the individual layers are anisotropic and piezoelectric and have arbitrary crystal orientation. The algoritlini is numerically stable and easily implemented for use on a personal computer using commercial software. A network model is also derived which provides both an approximate analysis of multilayer transducer performance and an insight into synthesis procedures.Examples compare the two approaches and illustrate an initial design procedure for broadband transducers.

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Analysis of acoustic properties of multi-layered structures by means of effective acoustic impedance matrix

Hashimoto

Watanabe

Akahane

et al.

IEEE Symposium on Ultrasonics

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Abs tractThe effective acoustic impedance matrix [Z(k)] is proposed and its applications are discussed.it is shown that [Z(k)] for any kind of multi-layered structures can be determined successively from the bottom substrate to the top layer. In addition, the use of [Z(k)] is able to avoid some problems often occurring in the numerical calculation for multi-layered structures. By using three typical examples, it is discussed how conveniently [Z(k)] is applied to characterise acoustic wave excitation and propagation in some complicated layered structures as well as in semiinfinite substrates.

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Multilayer ZnO Acoustic Transducers at Millimeter-Wave Frequencies

Cited by 3 publications

References 7 publications

Apodization of multilayer bulk-wave transducers

Apodization of multilayer bulk-wave transducers

Anisotropic superlattice transducers: characteristics and models

Analysis of acoustic properties of multi-layered structures by means of effective acoustic impedance matrix

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