Title :
Phase modulation scheme for chipless RFID- and wireless sensor tags
Author :
Schüßler, Martin ; Mandel, Christian ; Maasch, Matthias ; Giere, Andre ; Jakoby, Rolf
Author_Institution :
Microwave Eng., Tech. Univ. Darmstadt, Darmstadt, Germany
Abstract :
Inspired by state of the art surface acoustic wave (SAW) technique an approach for the realization of chipless microwave RFID tags based on electrical circuits is proposed. For information coding of the retransmitted signal a passive QPSK coding scheme and for wireless monitoring of physical quantities an analog phase modulation scheme are investigated. Key elements for the realization of tags are lumped element delay lines. Therefore properties of left- and right-handed lines are discussed with the view on the special application. Finally, the proposed principles have been experimentally verified with a prototype.
Keywords :
quadrature phase shift keying; radiofrequency identification; surface acoustic waves; analog phase modulation; chipless microwave RFID tags; information coding; passive QPSK coding; surface acoustic wave; wireless monitoring; wireless sensor tags; Acoustic sensors; Acoustic waves; Microwave circuits; Microwave theory and techniques; Monitoring; Phase modulation; Quadrature phase shift keying; RFID tags; Surface acoustic waves; Wireless sensor networks; passive QPSK; passive microwave RFID; passive modulation; wireless sensors;
Conference_Titel :
Microwave Conference, 2009. APMC 2009. Asia Pacific
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2801-4
Electronic_ISBN :
978-1-4244-2802-1
DOI :
10.1109/APMC.2009.5385319
