UWB SAW sensors and tags

Marc Lamothe , Victor Plessky , Jean-Michel Friedt , Sylvain Ballandras

The radio Ultra Wide Band (UWB) technology brings many benefits, such as extremely low power of emitted especially attractive for sensors for the medical world. For the RFID tags wide frequency band allows to get large number of codes on the chip with radically reduced size. We have developed a prototype of a wide frequency band SAW sensor operating in a frequency range from 200MHz to 400MHz. The compressed pulse is about 5ns long which corresponds to theoretical expectations. Using LFM signals allows to get record low losses in the sensor. Correlation between compressed peaks will be used to extract the temperature with precision better than 0.1°C, and using the UWB signals simplifies the post processing algorithms. The sensor can have ID function due to different positions of reflectors and/or different dispersion of the LFM transducer.

Mots clés: Ultra-Wide-Band; SAW; tags; sensors

Domaines: Acoustique [physics.class-ph]

Marc Lamothe, Victor Plessky, Jean-Michel Friedt, Sylvain Ballandras. UWB SAW sensors and tags. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811040⟩