Title :
Impedance loaded SAW sensors offer a wide range of measurement opportunities
Author :
Steindl, Reinhard ; Pohl, Alfred ; Seifert, Franz
Author_Institution :
Appl. Electron. Lab., Tech. Univ. Wien, Austria
fDate :
12/1/1999 12:00:00 AM
Abstract :
Surface-acoustic-wave interdigital tags can be employed as passive transponders for conventional sensors of capacitive, inductive, and resistive types. An interdigital transducer is used as a loadable reflector, while other fixed reflectors are used as reference bits. The load of the programmable reflector influences both the phase and amplitude of the reflected wave. The principle is discussed, and applications for the measurement of light, pressure, and temperature are presented in this paper
Keywords :
interdigital transducers; pressure sensors; remote sensing; surface acoustic wave sensors; temperature sensors; transponders; ID tag; SAW sensor; impedance loading; interdigital transducer; light measurement; passive transponder; pressure measurement; programmable reflector; temperature measurement; wireless interrogation; Acoustic measurements; Acoustic sensors; Circuits; Impedance measurement; Magnetic sensors; Radio frequency; Sensor systems; Surface acoustic wave devices; Surface acoustic waves; Temperature sensors;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
