SENSITIVITY IMPROVEMENT OF WIRELESS PRESSURE SENSOR BY INCORPORATING A SAW REFLECTIVE DELAY LINE

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International Journal on Smart Sensing and Intelligent Systems

Professor Subhas Chandra Mukhopadhyay

Exeley Inc. (New York)

Subject: Computational Science & Engineering, Engineering, Electrical & Electronic

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VOLUME 1 , ISSUE 4 (December 2008) > List of articles

SENSITIVITY IMPROVEMENT OF WIRELESS PRESSURE SENSOR BY INCORPORATING A SAW REFLECTIVE DELAY LINE

Haekwan Oh / Weng Wang / Keekeun Lee / Ikmo Park / Sang Sik Yang

Keywords : coupling of modes, interdigital transducer, LiNbO3, piezoelectric substrate, reflective delay line, surface acoustic wave, wireless pressure sensor, temperature compensation

Citation Information : International Journal on Smart Sensing and Intelligent Systems. Volume 1, Issue 4, Pages 940-954, DOI: https://doi.org/10.21307/ijssis-2017-329

License : (CC BY-NC-ND 4.0)

Published Online: 02-November-2017

ARTICLE

ABSTRACT

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.

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REFERENCES

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