Title :
A coupled-mode filter structure for wireless transceiver-sensors using reactive loads
Author :
Laroche, T. ; Martin, G. ; Daniau, W. ; Ballandras, S. ; Friedt, J.-M. ; Leguen, J.-F.
Author_Institution :
Time & Freq. Dept., UTBM, Besancon, France
Abstract :
The possibility to remotely control impedance changes using resonant devices operating in the 434-MHz-centered Industry-Scientific-Medical (ISM) is demonstrated in this paper. The proposed principle is based on acoustically coupled modes in compact Surface Acoustic Wave (SAW) structures in which one port is connected to the variable load, the other being connected to a Radio-Frequency (RF) antenna for wireless interrogation purpose. The operation of the proposed principle is illustrated using a longitudinally-coupled resonator filter on quartz for “On-Off” switch remote control. Other sensor architecture are discussed as a conclusion of this work.
Keywords :
UHF antennas; radio transceivers; surface acoustic wave resonator filters; surface acoustic wave sensors; wireless sensor networks; ISM band; RF antenna; SAW structures; acoustic coupled modes; centered industry-scientific-medical band; compact surface acoustic wave structures; coupled-mode filter structure; frequency 434 MHz; longitudinally-coupled resonator filter; on-off switch remote control; quartz resonator filter; radio-frequency antenna; reactive loads; remotely control impedance; resonant devices; sensor architecture; wireless interrogation; wireless transceiver-sensors; Capacitance; Couplings; Frequency measurement; Radio frequency; Resonant frequency; Sensitivity; Transducers;
Conference_Titel :
Frequency Control Symposium (FCS), 2012 IEEE International
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4577-1821-2
DOI :
10.1109/FCS.2012.6243720
