UHF frequency-range passive RFID high-resolution double-frequency transmitting-receiving separator

The utility model discloses a UHF frequency-range passive RFID high-resolution double-frequency transmitting-receiving separator, which comprises a micro-strip coupling-line directional coupler, a transmitter port, a receiver port, a load port and an antenna port. The utility model is characterized in that the separator also comprises an absorbing resistor, a micro-strip segment 1, a micro-strip segment 2, an open circuit branch line 1, an open circuit branch line 2, an open circuit branch line 3 and a micro-strip open circuit line, wherein one end of the micro-strip segment 1 and one end of the open circuit branch line 1 are connected with the load port; the other end of the micro-strip segment 1 is connected with one end of the open circuit branch line 2 and one end of the micro-strip segment 2; the other end of the micro-strip segment 2 is connected with one of an open circuit branch line 3 and one end of the absorbing resistor; and other end of the absorbing resistor is connected with one end of the micro-strip open circuit line. The separator can realize high-resolution separation of RFID transmitting-receiving signals simultaneously at two frequency ranges and improves the operating distance of an RFID reader.