RFID tag containing two tuned circuits

Details RFID tag containing two tuned circuits RFID tag containing two tuned circuits

2006-07-05

2010-10-26

Mullen, Thomas J (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S572700, C340S572800

Reexamination Certificate

active

07821401

ABSTRACT:
An RFID tag is disclosed adapted to be read by an interrogator including a reader antenna having a carrier frequency. The tag includes a first circuit including a first inductor and a first capacitor, wherein the first circuit is tuned to a frequency above the carrier frequency to compensate for detuning in the presence of a plurality of tags. The RFID tag includes a second circuit including a second inductor and a second capacitor wherein the first and second inductors are arranged to be coupled electromagnetically with a coupling factor less than unity and the second circuit is tuned to increase coupling between the first circuit and the reader antenna. A method of reading an RFID tag in the presence of a plurality of tags is also disclosed.

REFERENCES:
patent: 5510769 (1996-04-01), Kajfez et al.
patent: 6340932 (2002-01-01), Rodgers et al.
patent: 6824054 (2004-11-01), Christoffers et al.
patent: 7286053 (2007-10-01), Gudeman et al.
patent: 7339481 (2008-03-01), Duron
patent: 2001/0003438 (2001-06-01), Imaichi et al.
patent: 2003/0016133 (2003-01-01), Egbert
patent: 2005/0116826 (2005-06-01), Wertsebrger
patent: 2005/0258966 (2005-11-01), Quan
patent: 2 388 744 (2003-11-01), None
patent: WO-00/44064 (2000-07-01), None

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