Closed slot antenna having outer and inner magnetic loops
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United States of America Patent
Stats
-
Nov 25, 1997
Grant Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Jun 15, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An RF identification system having an interrogator operable to send RF interrogations to a transponder and to receive RF responses from the transponder. The interrogator is in electrical communication with a closed slot antenna. The closed slot antenna is formed by an an outer visual magnetic loop and an inner visual magnetic loop such that the antenna has a superior magnetic field when compared to a balanced double loop antenna with an equal area and a superior far-field noise suppression when compared to the single loop antenna. The antenna receives said RF responses from the transponder and provides said RF responses to said interrogator. Other devices, systems and methods are also disclosed.
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