RFID tag inspection system

Details RFID tag inspection system RFID tag inspection system

2007-01-02

2007-01-02

Trieu, Van T. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S572500, C340S572700

Reexamination Certificate

active

11007221

ABSTRACT:
An RFID tag inspection system inspects the properties of tag antennas, and further, determines the communication performance of RFID tags, based on how much their resonant frequencies are shifted from a target value. The RFID tag inspection system includes: a reader/writer including a coiled reader/writer antenna, for transmitting/receiving data to or from the RFID tag at the resonant frequency through the reader/writer antenna; an RFID tag set portion on which the RFID tag is set in such a way that the tag antenna is located within a coverage area of the reader/writer antenna; and a magnetic field sensing coil including at least one open terminal, the magnetic field sensing coil being placed corresponding to the tag antenna.

REFERENCES:
patent: 5821859 (1998-10-01), Schrott et al.
patent: 6696952 (2004-02-01), Zirbes
patent: 6784789 (2004-08-01), Eroglu et al.
patent: 6806812 (2004-10-01), Cathey
patent: 6869021 (2005-03-01), Foth et al.
patent: 2002-230510 (2002-08-01), None

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