Simulation and design on surface acoustic wave reflective delay line for wireless sensor application using coupling of modes

被引：0
|
作者：
Xu, Fangqian [1 ]
Wang, Wen [2 ]
He, Shitang [2 ]
机构：
[1] Zhejiang University of Media and Communication, Hangzhou 310018, China
[2] Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
来源：
Shengxue Xuebao/Acta Acustica | 2010年 / 35卷 / 03期
关键词：
Acoustic propagation - Equivalent circuit model - Optimal design parameters - Piezoelectric substrates - Reflective coefficients - Reflective delay line - Single-phase unidirectional transducers - Surface acoustic wave reflective delay lines;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
This paper presented an optimal design on surface acoustic wave (SAW) reflective delay line using coupling of modes (COM) and equivalent circuit model, the reflective coefficient S11 of the SAW device was deduced to evaluate the device performance. Typical SAW reflective delay line consists of a piezoelectric substrate, an interdigital tranducer (IDT) and several reflector s positioned along the acoustic propagation direction. The effects of the design parameters of the device as structure of the IDT and reflector types on device performance were investigated, and the optimal design parameters were determined. Based on these parameters, a 440 MHz SAW reflective delay line with single phase unidirectional transducers (SPUDT) and three shorted grating reflectors was fabricated on 41° YX LiNbO3, and the measured S11 agrees well with the simulated one, sharp reflection peaks, high signal noise ratio (SNR), and low spurious noise between the reflection peaks were observed.
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页码：298 / 302
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