Radio Frequency Identification


RFID is the set of technologies which enable the identity of an item to be transmitted by radio to a receiver. It is an example of the broad category of automatic identification technologies. RFID usually involves two components (1) a tag or smart label which includes a unique ID and a wireless transmitter and (2) a receiver. There are many RFID applications for example access control (tags in personnel badges, readers in door entry mechanisms); and retail checkout (tags on each item are read when cart passes the reader).