Impedance loaded SAW-sensors offer a wide range of measurement opportunities

Author

Steindl, R. ; Pohl, A. ; Seifert, F.

Author_Institution

Appl. Electron. Lab., Univ. of Technol., Vienna, Austria

Volume

4

fYear

1999

fDate

13-19 June 1999

Firstpage

1453

Abstract

SAW ID-tags can be employed as passive transponders for conventional sensors of capacitive, inductive and resistive type. An interdigital transducer (IDT) is used as a loadable reflector, 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, applications for the measurement of light, pressure and temperature are presented.

Keywords

electric impedance; optical sensors; pressure sensors; surface acoustic wave sensors; surface acoustic wave transducers; temperature sensors; IDT; SAW ID-tags; amplitude; capacitive type sensor; fixed reflector; impedance loaded SAW-sensors; inductive type sensor; interdigital transducer; light; loadable reflector; measurement opportunities; passive transponders; phase; pressure; programmable reflector; reflected wave; resistive type sensor; temperature; Acoustic measurements; Acoustic sensors; Impedance measurement; Magnetic sensors; Mechanical sensors; Radio frequency; Sensor phenomena and characterization; Sensor systems; Surface acoustic waves; Transponders;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1999 IEEE MTT-S International

Conference_Location

Anaheim, CA, USA

Print_ISBN

0-7803-5135-5

Type

conf

DOI

10.1109/MWSYM.1999.780223

Filename

780223