A dual antenna RFID tag which can perform both Near Field (NF) communication and Far Field (FF) communication using a single RF tag is presented. The RFID tag includes an antenna unit and a voltage rectification unit. The antenna unit can perform communications in either or both a first and a second bandwidth. The voltage rectification unit can rectify and boost one or more radio signals received through the antenna unit and generate one or more power voltage impulses corresponding to the radio signals respectively.