RFID tag imager

Details RFID tag imager RFID tag imager

2007-07-03

2007-07-03

Pham, Toan N. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S572400, C702S075000, C343S703000

Reexamination Certificate

active

11072060

ABSTRACT:
In one embodiment, a system for obtaining an image of an RFID tag comprising a transponder and a tag antenna is provided, the system comprising: a plurality of inductors, each inductor being associated with a capacitor to form a resonant tank circuit, wherein each resonant tank circuit has a first resonant frequency in the presence of metal and a second resonant frequency in the absence of metal; a signal processor configured to determine a resonant frequency for each resonant tank circuit in the presence of the tag antenna; and a processor configured to compare the resonant frequency of each resonant tank circuit to the first and second resonant frequency to determine an image of the tag antenna.

REFERENCES:
patent: 6070803 (2000-06-01), Stobbe
patent: 6480110 (2002-11-01), Lee et al.
patent: 6889036 (2005-05-01), Ballweber et al.
patent: 7132946 (2006-11-01), Waldner et al.
patent: 2006/0202032 (2006-09-01), Kricorissian

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