HIGH PERFORMANCE RFID TRANSPONDER WITH FAST DOWNLINK
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United States of America Patent
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Issued Date -
Aug 6, 2009
app pub date -
Oct 16, 2008
filing date -
Oct 16, 2007
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A RFID transponder having a high quality factor antenna (LR), and a resonance capacitor (CR) coupled to the high quality factor antenna (LR) for providing a resonant circuit (LR, CR), wherein the RFID transponder is adapted to vary the quality factor of the resonant circuit (LR, CR) such that the quality factor is low during downlink data transmission when the RFID transponder receives data through the antenna (LR), and the quality factor is high during uplink data transmission, when the RFID transponder transmits data.
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