COMMUNICATION DEVICE FOR COLLECTING IDENTIFICATION INFORMATION OF RFID TAG

A communication terminal for collecting identification information of an RFID(Radio Frequency Identification) tag is provided to improve the stability of collecting RFID identification information due to generating circular polarization through vertical and horizontal polarization signals and collecting the RFID identification information from an RFID tag through the circular polarization. An oscillation unit(308) generates a sine wave. The first linear polarization antenna(301) transmits the sine wave generated from the oscillation unit as a vertical polarization signal to an RFID tag. A phase shifter(303) processes the second sine wave perpendicular to the sine wave generated by the oscillation unit. The second linear polarization antenna(302) transmits the processed second sine wave as a horizontal polarization signal to the RFID tag. The vertical and horizontal polarization signals are transmitted as circular polarization signals to the RFID tag. The first and second polarization antennas receive RFID identification information as a response signal with respect to the circular polarization signals from the RFID tag.