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非常高频轮模式共振器的非线性响应
Melisa Ekin Gulseren1, Jeronimo Segovia-Fernandez2, Yi Chang3
1Electrical and Computer Engineering Department, University of California, Davis, CA, USA.
Ultrasonics
|September 18, 2024
概括
化轮模式共振器 (CMR) 的非线性是由自热和几何效应引起的. 这些非线性可以用来创建用于电信和传感应用的频率.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 物理 物理学 物理
背景情况:
- 化轮模式共振器 (CMR) 对于非常高频 (VHF) 应用至关重要.
- 了解CMR中的非线性对于优化其性能和探索新功能至关重要.
研究的目的:
- 为了确定VHF化CMR中非线性性的来源.
- 使用物理和电路方法来建模这些非线性.
- 为了证明这些非线性对于频率生成的应用.
主要方法:
- 在不同射频功率下对225MHz的CMR进行实验性表征.
- 开发一个修改的Butterworth-Van Dyke (MBVD) 电路模型,其中包含非线性元素.
- 基于有限元法 (FEM) 的全波数值模拟来隔离非线性机制.
- 分析变量减噪,几何非线性和共振器质量因子 (Q) 之间的关系.
主要成果:
- 确定了自我加热诱导的非线性刚性和几何非线性诱导的变量缓作为共振红移的主要来源.
- 建立了可变减压系数和共振器的Q因子之间的线性相关性.
- 对实验数据验证了MBVD模型和FEM模拟.
- 在高QCMR中成功生成频率.
结论:
- 在VHF AlN CMR中的非线性已被很好地理解和建模.
- 这些发现为分析和设计非线性CMR提供了准则.
- 通过利用这些非线性,可以实现诸如MHz频率的新型应用,用于先进的电信和传感.
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