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A novel passive phase modulator based on LH delay lines for chipless microwave RFID applications

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4 Author(s)
Mandel, C. ; Microwave Eng., Tech. Univ. Darmstadt, Darmstadt, Germany ; Schussler, M. ; Maasch, M. ; Jakoby, R.

This paper discusses novel techniques to overcome problems arising when porting the surface acoustic wave approach of building passive radio-frequency identification and measurement systems to the electromagnetic domain without the need of mechanical (acoustical) delay lines. These techniques include the utilization of left-handed artificial delay lines and the increase of information density by using a higher order modulation scheme. The benefit from the porting is a broader field of applications, e. g. RFID tags working at very high temperatures or in other harsh environments become possible.

Published in:

Wireless Sensing, Local Positioning, and RFID, 2009. IMWS 2009. IEEE MTT-S International Microwave Workshop on

Date of Conference:

24-25 Sept. 2009