ELECTRONIC IDENTIFICATION DEVICE OR TRANSPONDER FITTED WITH TWO ANTENNAE TUNED TO DIFFERENT FREQUENCIES
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United States of America Patent
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N/A
Issued Date -
Mar 5, 2009
app pub date -
Aug 30, 2007
filing date -
Aug 30, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The electronic identification device or transponder (2) comprises a trigger circuit (12) linked to receiving means (14) of an interrogation signal sent at a first frequency by a reader (4 or 6), this trigger circuit serving to supply power to the transponder. It comprises an electronic response circuit (18) linked to an antenna (20) operating at a second frequency higher than said first frequency. This device or transponder additionally comprises a second electronic response circuit (26) linked to the antenna (14) to emit a second response signal at approximately the first frequency. The device or transponder (2) is therefore configured to operate with a single-frequency reader (4) or with a double-frequency reader (6). The electronic logic circuit (10) is configured in order to control the transmission of first response signals at the first frequency and second response signals at the second, higher frequency.
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