radio frequency identification, a technology similar in theory to bar code identification. with rfid, the electromagnetic or electrostatic coupling in the rf portion of the electromagnetic spectrum is used to transmit signals. an rfid system consists of an antenna and a transceiver, which read the radio frequency and transfer the information to a processing device, and a transponder,or tag, which is an integrated circuit containing the rf circuitry and information to be transmitted.
one of the key differences between rfid and bar code technology is rfid eliminates the need for line-of-sight reading that bar coding depends on. also, rfid scanning can be done at greater distances than bar code scanning.
advantage of rfid: