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http://hdl.handle.net/10397/106529
Title: | Propagation of thickness shear waves in a periodically corrugated quartz crystal plate and its application exploration in acoustic wave filters | Authors: | Li, P Cheng, L |
Issue Date: | May-2017 | Source: | Ultrasonics, May 2017, v. 77, p. 100-109 | Abstract: | The propagation of thickness shear waves in a periodically corrugated quartz crystal plate is investigated in the present paper using a power series expansion technique. In the proposed simulation model, an equivalent continuity of shear stress moment is introduced as an approximation to handle sectional interfaces with abrupt thickness changes. The Bloch theory is applied to simulate the band structures for three different thickness variation patterns. It is shown that the power series expansion method exhibits good convergence and accuracy, in agreement with results by finite element method (FEM). A broad stop band can be obtained in the power transmission spectra owing to the trapped thickness shear modes excited by the thickness variation, whose physical mechanism is totally different from the well-known Bragg scattering effect and is insensitive to the structural periodicity. Based on the observed energy trapping phenomenon, an acoustic wave filter is proposed in a quartz plate with sectional decreasing thickness, which inhibits wave propagation in different regions. | Keywords: | Acoustic wave filter Energy trapping Phononic quartz crystal plate Power series expansion Thickness shear waves |
Publisher: | Elsevier BV | Journal: | Ultrasonics | ISSN: | 0041-624X | EISSN: | 1874-9968 | DOI: | 10.1016/j.ultras.2017.02.004 | Rights: | © 2017 Elsevier B.V. All rights reserved. © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ The following publication Li, P., & Cheng, L. (2017). Propagation of thickness shear waves in a periodically corrugated quartz crystal plate and its application exploration in acoustic wave filters. Ultrasonics, 77, 100-109 is available at https://doi.org/10.1016/j.ultras.2017.02.004. |
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