Patent ID: 8666323

Claim:
A Radio Frequency IDentification (RFID) reader comprising: a first power divider dividing a transmit (TX) signal to output a first TX signal and a second TX signal; a second power divider dividing the second TX signal to output a third TX signal and a fourth TX signal; a first loop receiving the first TX signal and suppressing a first transmission leakage signal of a receive (RX) signal in response to a first leakage control signal; a second loop receiving the third TX signal and suppressing a second transmission leakage signal of the RX signal, received through the first loop, in response to a second leakage control signal; a digital signal processor generating the first leakage control signal and the second leakage control signal, wherein the digital signal processor generates the first leakage control signal until the level of the first transmission leakage signal becomes equal to or lower than the level of a first reference transmission leakage signal; and a TX antenna receiving the fourth TX signal.