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

Volume

47

Issue

12

fYear

1999

fDate

12/1/1999 12:00:00 AM

Firstpage

2625

Lastpage

2629

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;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.809016

Filename

809016