Radio frequency antenna for an object interrogation device comprising a radio frequency antenna associated with an electronic circuit
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United States of America Patent
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May 17, 2005
Grant Date -
Dec 12, 2002
app pub date -
Jun 12, 2002
filing date -
Dec 16, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A transmission/reception radio-wave aerial for an interrogation device for electronic labels carried by objects, the transmission/reception radio-wave aerial being tuned to an F0 frequency and each electronic label including a radio-wave aerial tuned to the F0 frequency and being associated with an electronic circuit, wherein the transmission/reception radio-wave aerial is arranged to create a magnetic field which modifies the tuning frequency for the radio-wave aerials for the electronic labels in such a way to retune towards the F0 frequency of the aerial of the interrogation device.
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