Patent ID: 11874365
Assignee: ZEBRA TECHNOLOGIES CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A system for locating passive RFID tags comprising:
a narrowband RFID reader configured to transmit a narrowband RF signal to energize a passive RFID tag, thereby causing the passive RFID tag to modulate the narrowband RF signal by switching a first antenna of a dual band antenna inlay of the passive RFID tag to create a backscatter reflection target and reflect the modulated narrowband RF signal indicative of tag data of the passive RFID tag;
a first wideband transceiver configured to receive and transmit a wideband RF signal;
a second wideband transceiver different from the first wideband transceiver, the second wide band transceiver configured to:
receive a backscatter wideband RF signal reflected from the backscatter reflection target; and
record time-of-arrival data for the reflected backscatter wideband RF signal at the second wideband transceiver; and

processing circuitry configured to determine a location measurement of the passive tag based on the time-of-arrival data, wherein the second wideband transceiver is configured to receive and transmit another wideband RF signal.