Title: Apparatus for magnetically decoupling and rfid tag
Application Number: 98803613 Application Date: 1998.03.16
Publication Number: 1251189 Publication Date: 2000.04.19
Approval Pub. Date: 2005.11.16 Granted Pub. Date: 2005.11.16
International Classifi-cation: G08B13/14;H04B1/44
Applicant(s) Name: Checkpoint Systems, Inc. Address:
Inventor(s) Name: Janez Trontelj
Attorney & Agent: han hong
Abstract:
    A resonant circuit tag (12) includes an integrated circuit (18) for storing data and an antenna circuit (22) for generating a first local field and resonating at a first predetermined radio frequency. A second circuit including an inductive coil (30) selectively generates a second local field such that a sum of the first and second local fields approaches zero. The second circuit thus allows the resonant tag (12) to be selectively decoupled from its environment.
Time: 5
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