Resonant tag and deactivator for use in an electronic security system
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United States of America Patent
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-
Feb 5, 1985
Grant Date -
N/A
app pub date -
May 10, 1982
filing date -
May 10, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A resonant tag circuit having at least one resonant frequency is operative in an electronic security system in which the tag circuit is sensed and electronically deactivated to destroy the resonant characteristics of the tag circuit at the detection frequency. The tag circuit is electronically deactivated by a breakdown mechanism operative within the resonant structure of the tag to cause vaporization of a conductive area or short-circuiting of capacitor plates to destroy the resonant properties of the circuit. A deactivator provides electromagnetic energy at a resonant frequency of the tag circuit of sufficient energy to cause electrical breakdown and deactivation of the tag circuit.
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