基于声表面波反射延迟线无线传感器的理论分析与设计

南京大学学报(自然科学版) ›› 2013, Vol. 49 ›› Issue (1): 46–51.

基于声表面波反射延迟线无线传感器的理论分析与设计

徐方迁1，王艳清1，王文2

出版日期:2015-09-25 发布日期:2015-09-25
作者简介: (1.浙江传媒学院，杭州，310018;2.中国科学院声学所，北京，100190)
基金资助:
National Nature Science Foundation oI ChinaC10974171)，Zhejiang Province Nature Science Foundation
(LY12A04003)

Theoretical analysis and design of wireless surface acoustic
wave sensor based on reflective delay line*

Xu Fang一Qian1**,Wang Yan一Qing 1 ,Wang Wen2

Online:2015-09-25 Published:2015-09-25
About author: (1.Zhejiang University of Media and Communication, Hangzhou，310018,China;
2.Institute of Acoustics,Chinese Academy of Sciences,Beijing，100190,China)

摘要/Abstract

摘要： 给出了一个新的关于声表面波反射延迟线理论分析方法，基于波动方程和Chen-H aus理论、
利用变分方法研究了压电基底上金属短路栅阵中声表面波传输特性，得到其精确反射系数.之后，实验
研制了一个用41º YX LiNb03、单相单向换能器和三个短路反射栅构成的434MHz声表面波反射延迟
线，测量值与理论分析基木一致，器件具有尖锐反射峰、高信噪比等特性.

Abstract: This paper presents a theoretical analysis and design on surface acoustic wave reflective delay line. Based on the
wave equation and Chen-Haus theory, a variational principle is used to investigate surface acoustic waves passing through
shorted-circuited gratings on a piezoelectric crystal.The reflection coefficient of the granting is deduced to evaluate the device
performance. After obtaining these parameters,a 434 MHz SAW reflective delay line with single phase unidirectional trans-
ducers and three shorted grating reflectors is fabricated on 41ºYX LiNbO3.The measured reflective coefficients agree well
with the simulated one. Sharp reflection pcaks,high signal noise ratio(S/N)and low spurious noise between the reflection
peaks arc observed.

徐方迁1，王艳清1，王文2
. 基于声表面波反射延迟线无线传感器的理论分析与设计[J]. 南京大学学报(自然科学版), 2013, 49(1): 46–51.

Xu Fang一Qian1**,Wang Yan一Qing 1 ,Wang Wen2. Theoretical analysis and design of wireless surface acoustic
wave sensor based on reflective delay line*
[J]. Journal of Nanjing University(Natural Sciences), 2013, 49(1): 46–51.

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