Articles | Volume 1
Adv. Radio Sci., 1, 131–133, 2003
https://doi.org/10.5194/ars-1-131-2003
Adv. Radio Sci., 1, 131–133, 2003
https://doi.org/10.5194/ars-1-131-2003

  05 May 2003

05 May 2003

Telemetric surface acoustic wave sensor for humidity

M. Dierkes and U. Hilleringmann M. Dierkes and U. Hilleringmann
  • Faculty for Computer Science, Electrical Engineering and Mathematics, Sensor Technology Department, University of Paderborn, Warburger Str. 100, 33098 Paderborn, Germany

Abstract. 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.