Personal identification system
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United States of America Patent
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-
Mar 25, 1997
Grant Date -
N/A
app pub date -
Dec 27, 1993
filing date -
Dec 27, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A personal identification system includes a number of antenna preamplifier nodes coupled to collection nodes which are in turn coupled to a central computer. A personal detector unit attached to a user is inserted into an enclosure of the antenna preamplifier node. The antenna preamplifier node is electrically isolated by RF attenuation material. An antenna of the antenna preamplifier node is a low gain antenna. The antenna preamplifier node reads a coded radio frequency signal of a personal detector unit inserted into an enclosure and rejects signals of other various personal detector units in the vicinity.
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Family
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