Encoded SAW RFID tags and sensors for multi-user detection using IDT finger phase modulation
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United States of America Patent
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Dec 7, 2004
Grant Date -
Jun 24, 2004
app pub date -
Dec 20, 2002
filing date -
Dec 20, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A group of SAW RFID tags or sensors each has a transducer with interdigitated fingers, a different set of fingers in each tag or sensor being reversed in phase to cause the tag or sensor to provide a unique identifier in a returned impulse response produced by the tag or sensor when interrogated by an interrogation signal.
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