Wireless SAW sensors for surface and subsurface sensing applications

Andreas Stelzer; Gernot Schimetta; Leonhard Reindl; Andreas Springer; Robert Weigel

doi:10.1117/12.450181

27 November 2001 Wireless SAW sensors for surface and subsurface sensing applications

Andreas Stelzer, Gernot Schimetta, Leonhard Reindl, Andreas Springer, Robert Weigel

Proceedings Volume 4491, Subsurface and Surface Sensing Technologies and Applications III; (2001) https://doi.org/10.1117/12.450181
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

Surface acoustic wave (SAW) devices, used as filters or diplexers, are well established components in communications applications like in mobile handsets or television sets. The characteristics of SAW devices make them also well suitable for the application of wireless sensors or wireless identification tags. A great advantage of SAW sensors is their completely passive operation without the need for additional power supplies. SAW sensors can be designed to sense several physical or chemical quantities like temperature, pressure, stress, or gas concentration. During operation of the wireless sensor the energy delivered from an RF pulse sent by an interrogation unit is picked up by the antenna, stored in the surface acoustic wave, modified by the sensor effect and is finally transmitted back to the interrogation unit. In this paper the basic operating principles of SAW devices are reviewed and two applications, a state-of-the-art tire pressure sensor and a moisture sensor, are presented.

Citation Download Citation

Andreas Stelzer, Gernot Schimetta, Leonhard Reindl, Andreas Springer, and Robert Weigel "Wireless SAW sensors for surface and subsurface sensing applications", Proc. SPIE 4491, Subsurface and Surface Sensing Technologies and Applications III, (27 November 2001); https://doi.org/10.1117/12.450181

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available