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:
whether you are concerned with tracking inventory in a warehouse or maintaining a fleet of vehicles, there is a clear need for a fully automated data capture and analysis system that will help you keep track of your valuable assets and equipment.
activewave rfid technologies provide unique solutions to difficult logistical tracking of inventory or equipment- particularly in applications where optically based systems fail and when read/write capabilities are required. the technology is stable, and evolving, with open architectures becoming increasingly available.

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