文章基本信息

标题：Sensitivity Improvement Of Wireless Pressure Sensor By Incorporating A Saw Reflective Delay Line
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作者：MHaekwan Oh ; Weng Wang ; Keekeun Lee 等
期刊名称：International Journal on Smart Sensing and Intelligent Systems
印刷版ISSN：1178-5608
出版年度：2008
卷号：1
期号：04
页码：940-954
出版社：Massey University
摘要：this paper presents a wireless surface acoustic wave (SAW) pressure sensor on 41oYX LiNbO3 for tire pressure monitoring system (TPMS) application, in which a reflective delay line composed of an interdigital transducer (IDT) and several reflectors was used as the sensor element. Using the coupling of modes (COM), the SAW reflective delay line was simulated, and the optimal design parameters were determined. The fabricated 2.4GHz SAW sensor was wirelessly characterized by the network analyzer. Sharp reflection peaks, few spurious signals, and relatively high signal-to-noise (S/N) ratio were observed. High sensitivity of 2.9 deg/kPa and good linearity were observed.
关键词：coupling of modes, interdigital transducer, LiNbO3, piezoelectric substrate, reflective delay line, surface acoustic wave, wireless pressure sensor, temperature compensation