Apparatus and method for offsetting transmission leakage signal of RFID reader using injection locked oscillator (ILO)

摘要

A transmission leakage signal offset apparatus of a radio frequency identification (RFID) reader is disclosed. The transmission leakage signal offset apparatus may include a signal divider to divide a received signal of the RFID reader, the received signal including a transmission leakage signal, and to transmit the divided received signal to a signal combiner and an injection locked oscillator (ILO); a signal synchronizer to synchronize a phase of the ILO with a phase of the transmission leakage signal; a phase controller to control a phase difference between the received signal of the RFID reader and an output signal of the ILO; and a signal combiner to combine the received signal of the RFID reader and the output signal of the ILO, between which the phase difference is controlled.

主权项

1. A transmission leakage signal offset apparatus of a radio frequency identification (RFID) reader, the transmission leakage signal offset apparatus comprising:
a signal divider to divide a received signal of the RFID reader, the received signal including a transmission leakage signal, and to transmit the divided received signal to a signal combiner and an injection locked oscillator (ILO); a signal synchronizer to synchronize a phase of the ILO with a phase of the transmission leakage signal; a phase controller to control a phase difference between the received signal of the RFID reader and an output signal of the ILO; and a signal combiner to combine the received signal of the RFID reader and the output signal of the ILO, between which the phase difference is controlled.