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Telemetric surface acoustic wave sensor for humidity

Author(s): M. Dierkes | U. Hilleringmann

Journal: Advances in Radio Science - Kleinheubacher Berichte
ISSN 1684-9965

Volume: 1;
Start page: 131;
Date: 2003;
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Surface acoustic wave sensors consist of a piezoelectric substrate with metal interdigital transducers (IDT) on top. The acoustic waves are generated on the surface of the substrate by a radio wave, as it is well known in band pass filters. The devices can be used as wireless telemetric sensors for temperature and humidity, transmitting the sensed signal as a shift of the sensor’s resonance frequency.

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