Title :
Wireless sensor system using surface acoustic wave devices
Author :
Saitoh, Atushi ; Nomura, Toru
Author_Institution :
Dept. of Electr. Commun., Shibaura Inst. of Technol., Tokyo, Japan
Abstract :
A new RFID tag system has been designed by utilizing a reflective surface acoustic wave (SAW) delay line. A shear horizontal mode SAW (SH-SAW) has the unique characteristic of complete reflection at an edge normal to the direction of propagation. This characteristic makes it possible to construct a reflective delay line. The reflective delay line can be used to construct passive sensors that measure from a remote location. In this paper, a reflective SAW delay line is utilized to fabricate a passive sensor and radio frequency identification (RFID) tags. Experimental results showed that the reflective delay lines are very suitable in making SAW RFID tags. Moreover, some applications of the SH-SAW RFID tags are demonstrated for measurement of the acoustic properties of liquids and strain of solid.
Keywords :
acoustic wave reflection; radiofrequency identification; surface acoustic wave delay lines; surface acoustic wave sensors; wireless sensor networks; RFID tag system; passive sensor; radio frequency identification tag; reflective surface acoustic wave delay line; remote location; shear horizontal mode SAW; surface acoustic wave device; wireless sensor system; Acoustic measurements; Acoustic sensors; Acoustic waves; Delay lines; RFID tags; Sensor phenomena and characterization; Sensor systems; Surface acoustic wave devices; Surface acoustic waves; Wireless sensor networks; SAW ID tag; environmental monitoring sensor; passive sensor; surface acoustic wave;
Conference_Titel :
ICCAS-SICE, 2009
Conference_Location :
Fukuoka
Print_ISBN :
978-4-907764-34-0
Electronic_ISBN :
978-4-907764-33-3
