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Wireless interrogator system for SAW-identification-marks and SAW-sensor components

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4 Author(s)
Schmidt, F. ; Corp. Res. & Dev., Siemens AG, Munich, Germany ; Sczesny, O. ; Ruppel, C.C.W. ; Magori, V.

A sensor system is presented, comprising surface acoustic wave (SAW) components as identification marks (“ID-tags”) or as sensor elements for various tasks, and an interrogator for reading the sensor elements from a distance. As interrogator a chirp radar device at 2.45 GHz center frequency was developed, using a pair of dispersive SAW filters for pulse expansion and compression. It transmits expanded pulse signals to the SAW sensor elements and receives their responses. Reading ID-tags at a maximum distance of about 2.5 m with 10 mW peak output power, this system was successfully introduced to the Munich subway system for railway vehicle identification at high speed

Published in:

Frequency Control Symposium, 1996. 50th., Proceedings of the 1996 IEEE International.

Date of Conference:

5-7 Jun 1996

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