Characterization of loss mechanisms in piezoelectric ceramic microresonators

Joseph Kelly, Arthur Ballato, Ahmad Safari

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

Piezoelectric ceramic microresonators possess the very attractive attributes of low cost and high piezoelectric coupling; these make them potentially suitable for high-volume telecommunications applications such as cellular radio/comm-on-the-move. Actuators for microelectromechanical structures (MEMS) applications using bimorph cantilevers are also envisioned using piezoceramics for the same reasons. One problem impeding development is an adequate treatment of loss; it is often the case that devices are designed that do not fulfill their promise because insufficient attention has been addressed to the various dissipation mechanisms involved. For piezoceramics especially, because of the high values attained by the coupling coefficient, it is frequently unjustified to make simplistic assumptions concerning the incorporation and treatment of loss. We explore the incorporation of complex material coefficients into a complex electromechanical coupling coefficient, k* = k′-jk″. Resulting from this is a complex resonance frequency of the resonator. We also propose a method for more accurately characterizing lossy ceramic resonators.

Original languageEnglish (US)
Pages (from-to)539-542
Number of pages4
JournalProceedings of the IEEE Ultrasonics Symposium
Volume1
StatePublished - 1996
EventProceedings of the 1996 IEEE Ultrasonics Symposium. Part 2 (of 2) - San Antonio, TX, USA
Duration: Nov 3 1996Nov 6 1996

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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