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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Zaitsev, B.D. Joshi, S.G. Kuznetsova, I.E. |
| Copyright Year | 1998 |
| Description | Author affiliation: Marquette Univ., Milwaukee, WI, USA (Zaitsev, B.D.) |
| Abstract | This paper presents theoretical and experimental study of QSH waves propagating in thin plates of lithium niobate. The electromechanical coupling coefficient K/sup 2/ has been calculated as a function of plate thickness and propagation direction for all main crystallographic cuts. Y-cut and X-propagation for which K/sup 2/ may be more than 30% were chosen for our experiments. We have measured K/sup 2/ as a function of plate thickness and have obtained a good agreement with theory. The extremely large value of K/sup 2/ opens possibility of realizing devices whose parameters can be controlled by electrical boundary conditions. We have studied SH waves propagating in the presence of a conducting electrode. It is found that by varying the gap between plate and electrode, the phase shift for a 3.2 MHz delay line can be varied by as much as 240/spl deg/. We have also studied the influence of a thin layer of arbitrary conductivity on the velocity and attenuation of the QSH wave. Analysis show that the variations in these parameters can be as high as 18% and 4 dB//spl lambda/ for a change of surface conductivity from 10/sup -7/ to 10/sup -5/ S. |
| Starting Page | 419 |
| Ending Page | 422 |
| File Size | 244376 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780340957 |
| ISSN | 10510117 |
| DOI | 10.1109/ULTSYM.1998.762178 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1998-10-05 |
| Publisher Place | Japan |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Acoustic waves Acoustic propagation Electrodes Conductivity Lithium niobate Crystallography Thickness measurement Boundary conditions Delay lines Attenuation |
| Content Type | Text |
| Resource Type | Article |
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