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• W3045559811 abstract "Piezoelectric resonators have been extensively used as filters, actuator, and sensors. The effective electromechanical coupling coefficient (k <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>eff</sub> ) is the most useful parameter to evaluate the electromechanical conversion efficiency of piezoelectric resonators. However, even for simple geometry piezoelectric resonators, such as disks, the coupling between different modes makes the resonant characteristics very complex. The coupling causes low electromechanical coupling efficiency of the intended mode. We propose a finite-element-based energy integration method to calculate k <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>eff</sub> of piezoelectric resonators. This method is more accurate than the conventional resonance-antiresonance method and provides a powerful tool for the design optimization of pure mode resonators. A special case studied here is the fundamental thickness extensional (TE) mode of PZT-8 disks in the aspect ratio range of 2-20. Our results showed that multimode coupling near this mode can be greatly suppressed by modifying the edge surface of the disk to a convex shape. Such an optimized design could enhance k <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>eff</sub> of the fundamental TE mode by as much as 10%-45% depending on the aspect ratio." @default.
• W3045559811 created "2020-08-03" @default.
• W3045559811 creator A5021362384 @default.
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• W3045559811 date "2021-03-01" @default.
• W3045559811 modified "2023-09-27" @default.
• W3045559811 title "Energy Integration Method for Calculating k eff and its Application in Design Optimization of Disk Resonators via Convex Edge" @default.
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• W3045559811 doi "https://doi.org/10.1109/tuffc.2020.3011464" @default.
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