Extended range passive wireless tag system and method
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United States of America Patent
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Jun 18, 2013
Grant Date -
Jan 5, 2012
app pub date -
Jul 1, 2010
filing date -
Jul 1, 2010
priority date (Note) -
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Abstract
A passive wireless tag assembly comprises a plurality of antennas and transmission lines interconnected with circuitry and constructed and arranged in a Van Atta array or configuration to reflect an interrogator signal in the direction from where it came. The circuitry may comprise at least one surface acoustic wave (SAW)-based circuit that functions as a signal reflector and is operatively connected with an information circuit. In another embodiment, at least one delay circuit and/or at least one passive modulation circuit(s) are utilized. In yet another embodiment, antennas connected to SAW-based devices are mounted to at least one of the orthogonal surfaces of a corner reflector.
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