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一种高性能表面声波传感技术

Mengmeng Wu¹, Xiao Liu¹, Renfei Wang¹

¹International Center for Quantum Materials, Peking University, Haidian, Beijing 100871, China.

The Review of scientific instruments

|May 29, 2024

概括

我们开发了一个稳定的解调系统,以精确测量射频信号. 该系统能够非常灵敏地检测表面声波速度变化,并可用于无校准温度计.

科学领域:

物理物理学物理
材料科学材料科学材料科学
电气工程电气工程

背景情况:

精确测量弱射频 (RF) 信号对于各种科学技术应用至关重要.
目前用于检测振幅和相位移的现有方法往往在稳定性和分辨率方面面临限制.
表面声波 (SAW) 设备为敏感测量提供了潜力,但需要强大的信号处理.

研究的目的:

介绍一种新的超heterodyne-scheme解调系统,用于高稳定性,高分辨率检测弱射频信号.
为了证明该系统在测量表面声波 (SAW) 速度变化的能力具有非常高的精度.
探索SAW设备作为无校准,高灵敏度温度计的应用.

主要方法:

实现一个超异质变调系统.
使用延迟线装置来产生和检测表面声波 (SAW).
进行SAW速度变化测量时,其温度范围从30K到室温.

主要成果:

超heterodyne系统在检测射频信号幅度和相位变化方面实现了非凡的稳定性和分辨率.
在表面声波中<0.1 ppm的速度变化是使用延迟线装置解决的.
该SAW设备展示了无校准,高灵敏度和快速响应温度计的潜力.

结论:

开发的超heterodyne解调系统在测量弱射频信号方面取得了重大进展.
精确测量SAW速度变化凸显了系统的高分辨率.
当与该系统相结合时,SAW设备为先进的温度计应用提供了一个有前途的平台.

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