表面声波磁电传感器的时域分析
Time-Domain Analysis of Surface Acoustic Wave Magnetoelectric Sensors
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中文总结 AI 辅助
本研究采用数值与实验结合的方法，分析基于多层乐甫波延迟线的磁电SAW传感器的时域传播特性，验证了时域与频域分析的一致性，实现了传感器瞬态传播行为的定量表征。
中文摘要 AI 辅助
表面声波传感器的瞬态响应对于理解其动态行为、传播延迟以及对时变信号的响应至关重要。本研究采用互补的数值与实验方法，对基于多层乐甫波延迟线的磁电SAW传感器的时域传播特性展开研究。通过时域分析确定延迟时间，并提取相速度与群速度，同时频域分析可对波的色散进行独立表征。数值与实验结果均表明，相速度与群速度存在差异，这反映了乐甫波在多层结构中的色散特性。在146 MHz的工作频率下，通过波场追踪得到的模拟群速度与由频域色散关系确定的数值偏差在0.4%以内；模拟延迟时间与群速度也与实验结果吻合良好，延迟时间偏差为2.7%，群速度偏差为0.9%。这些结果证明了时域与频域分析的一致性，并为SAW传感器的瞬态传播行为提供了定量表征。
英文摘要
The transient response of surface acoustic wave sensors is important for understanding their dynamic behavior, propagation delay, and response to time-varying signals. In this work, the time-domain propagation characteristics of a magnetoelectric SAW sensor based on a multilayer Love-wave delay line are investigated using complementary numerical and experimental approaches. Time-domain analysis is employed to determine the delay time and to extract the phase and group velocities, while frequency-domain analysis provides an independent characterization of the wave dispersion. Both numerically and experimentally, the phase and group velocities are found to differ, reflecting the dispersion of the Love wave in the multilayer structure. At the operating frequency of 146 MHz, the simulated group velocity obtained from wave-field tracking agrees within 0.4% with the value determined from the frequency-domain dispersion relation. The simulated delay time and group velocity also show good agreement with experiment, with deviations of 2.7% in delay time and 0.9% in group velocity. These results demonstrate the consistency of the time- and frequency-domain analyses and provide a quantitative characterization of the transient propagation behavior of SAW sensors.
发表机构
- Kiel University（基尔大学）
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