Reindl L, Pohl A, Scholl G, Weigel R (2001)
Publication Type: Journal article
Publication year: 2001
Publisher: IEEE
Book Volume: 1
Pages Range: 69-78
Journal Issue: 1
Surface acoustic wave (SAW) devices can be used as identification and sensor elements (SAW transponders) for measuring physical quantities such as temperature, pressure, torque, acceleration, humidity, etc., that do not need any power supply and may be accessed wirelessly. The complete wireless sensor system consists of such a SAW transponder and a local radar transceiver. An RF burst transmitted by the radar ransceiver is received by the antenna of the SAW transponder. The passive transponder responds with an RF signal—like a radar echo—which can be received by the front-end of the local transceiver. Amplitude, frequency, phase and time of arrival of this RF response signal carry information about the SAW reflection and propagation mechanisms which in many cases can be irectly attributed to the sensor effect for a certain measurand. Usually no intersymbol interference (ISI) due to environmental choes occur, due to the high delay time of the SAW transponder in the order of some s. The present work reviews the operating rinciples of such sensor systems and their state-of-the-art performance by way of some examples which include the wireless easurement of temperature, pressure, torque, acceleration, tire-road friction, magnetic field, and water content of soil.
APA:
Reindl, L., Pohl, A., Scholl, G., & Weigel, R. (2001). SAW-Based Radio Sensor Systems. IEEE Sensors Journal, 1(1), 69-78. https://dx.doi.org/10.1109/JSEN.2001.923589
MLA:
Reindl, Leonhard, et al. "SAW-Based Radio Sensor Systems." IEEE Sensors Journal 1.1 (2001): 69-78.
BibTeX: Download