公开(公告)号：US11874365B2

公开(公告)日：2024-01-16

申请号：US15967244

申请日：2018-04-30

Applicant: Zebra Technologies Corporation

Inventor： David S. Wisherd ,  Robert W. Boyd

IPC: G01S13/87 ,  G01S13/75

CPC classification number: G01S13/878 ,  G01S13/75

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.