Passive radio frequency identification ranging
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United States of America Patent
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Jan 16, 2024
Grant Date -
Aug 30, 2018
app pub date -
Apr 30, 2018
filing date -
Oct 9, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An example system for locating passive RFID tags includes a narrowband RFID reader configured to transmit a narrowband RF signal to energize a passive RFID tag, thereby causing the passive RFID tag to create a backscatter reflection target; a first wideband transceiver configured to transmit a wideband RF signal; a second wideband transceiver configured to: receive the wideband RF signal reflected from the backscatter reflection target; and record time-of-arrival data for the reflected wideband signal; and processing circuitry configured to determine a location measurement of the passive tag based on the time-of-arrival data.
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