RFID SYSTEM INCLUDING TAGS HAVING LOW RF SCATTERING MODE
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United States of America Patent
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Issued Date -
May 24, 2007
app pub date -
Jun 30, 2006
filing date -
Nov 18, 2005
priority date (Note) -
Abandoned
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Abstract
A radio frequency identification (RFID) system includes a plurality of RFID tags addressable by a tag reader, with each tag comprising a RF antenna, an integrated circuit including a memory for identification data and coupled to the antenna, the integrated circuit being configured to have a first antenna load impedance when accessed by the tag reader and a second higher load impedance after access by tag reader whereby the tag switches to a low scattering state for a finite period of time to reduce scattering of signals from the tag reader.
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