Apparatus for magnetically decoupling an RFID tag
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United States of America Patent
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-
Mar 27, 2001
Grant Date -
N/A
app pub date -
Mar 5, 1998
filing date -
Mar 24, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A resonant circuit tag includes an integrated circuit for storing data and an antenna circuit for generating a first local field and resonating at a first predetermined radio frequency. A second circuit including an inductive coil 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 to be selectively decoupled from its environment.
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