Method and system to determine the position, orientation, size, and movement of RFID tagged objects
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United States of America Patent
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Aug 21, 2012
Grant Date -
Dec 30, 2010
app pub date -
Jun 30, 2009
filing date -
Jun 30, 2009
priority date (Note) -
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Abstract
A method and system of determining spatial identification of an object, such as orientation, size, location, range, and/or movement, using an RFID system is disclosed. An RFID system can comprise one or more RFID reader receiving antennas that query one or more RFID tags coupled to the object. The measurement of the phase of the tag responses at the reader antennas and phase differentials as a function of distance, frequency, and time are the basis of spatial identification. The system can work with conventional Gen 2 tags and readers without modification of the tags or protocol.
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