LOW-FREQUENCY RECEIVING FOR RADIO FREQUENCY IDENTIFICAITON

摘要

A radio frequency identification (RFID) tag includes a power source, a transmitter to transmit a unique identifier, and a receiver operatively coupled to the transmitter and to receive low-frequency signals from an active RFID transceiver located in the vicinity. The transmitter is activated by the power source responsive to the receiver receiving a wake up command at a predetermined low frequency from the active RFID transceiver. An RFID transceiver includes an antenna, non-transitory computer-readable medium storing instructions and a transmitter to transmit low-frequency signals to RFID tags through the antenna. A processing device of the RFID transceiver can execute the instructions to insert a station identifier (ID) into the low-frequency signals that direct the RFID tags to retransmit the station ID, wherein the station ID identifies an approximate location of the RFID tags.

主权项

1. A radio frequency identification (RFID) tag comprising:
a power source; a transmitter to transmit a unique identifier; a receiver operatively coupled to the transmitter and to receive low-frequency signals from an active RFID transceiver located within a vicinity of the receiver; and wherein the transmitter is activated by the power source responsive to the receiver receiving a wake up command at a predetermined low frequency from the active RFID transceiver.