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Phononic Crystal Hole-Contour Optimization and Its Role in Energy Confinement of AT-Cut Quartz Resonators
编号：89 访问权限：仅限参会人 更新：2026-09-24 11:55:26 浏览：1次 口头报告

报告开始：暂无开始时间（Asia/Shanghai）

报告时间：暂无持续时间

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摘要
To mitigate vibration-energy leakage caused by anchor loss in AT-cut quartz resonators, this paper is the first to propose a fixed-area air-hole contour optimization method based on conventional circular-hole phononic crystals that integrates complete-bandgap optimization with device-level evaluation of vibration-energy confinement. A square-lattice unit cell in an AT-cut quartz plate is parameterized by a Fourier series, and area recalibration ensures that each candidate has the same air-hole area as the circular reference. Subject to ligament-width and local-radius constraints, the minimum margin between the operating frequency and the edges of a complete phononic bandgap is used as the primary objective, while bandgap width is used as a secondary criterion. Optimization searches are then performed by re-evaluating the bandgap boundaries through a comprehensive two-dimensional wave-vector scan over the first Brillouin zone,yielding the optimized hole contour. Finally,the optimized contour is then arranged in three rows near the resonator anchors. Finite-element analyses of mode shapes and resonant impedance assess energy isolation. The results show that, without increasing the air-hole area, the optimized contour improves vibration-energy confinement in the electrode region and reduces resonant impedance,with the bandgap width increased by 35.4% and the device impedance decreased by 21.8% compared with the circular-hole counterpart. This approach offers a practical route for mitigating anchor loss in AT-cut quartz resonators.
 
关键词
phononic crystal,AT-cut quartz resonator,shape optimization,complete bandgap,anchor loss,FEM
报告人
Xianhui Shan
Postgraduate Student Xidian University

稿件作者
Xianhui Shan Xidian University
Yinghan Wang Xidian University
Jie Yang Xidian University
Lingling Yang Xidian University
Meng ZHAO Xidian University
Jing JI Xidian University
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重要日期

  • 会议日期

    11月06日

    2026

    至

    11月08日

    2026

  • 10月15日 2026

    初稿截稿日期

主办单位
IEEE Instrumentation and Measurement Society
承办单位
Sichuan University
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