State of the art in wireless sensing with surface acoustic waves
Bulst, W.-E.
Fischerauer, G.
Reindl, L.
Corp. Technol., Siemens AG, Munich;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Apr 2001
Volume: 48,
Issue: 2
On page(s): 265-271
ISSN: 0278-0046
References Cited: 31
CODEN: ITIED6
INSPEC Accession Number: 6895153
Digital Object Identifier: 10.1109/41.915404
Current Version Published: 2002-08-07
Abstract
Surface acoustic wave (SAW) passive devices can be used in novel
applications such as wireless identification and sensing. For
identification purposes, a SAW transponder picks up an electromagnetic
request signal and stores it until all echoes caused by multipath
propagation have died away. Then, a characteristic response is beamed
back to the receiver. In radio-link sensors, a physical or chemical
quantity influences the propagation properties of the SAW and
consequently changes the response pattern of the device. This paper
surveys the operating principle of such sensors and their
state-of-the-art performance. Examples include temperature sensors and
sensors for mechatronic applications
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