Radio frequency identification (RFID) is a relatively new AIDC technology that keeps track of anything, especially those assets that move. Radio frequency identification system is a portable memory devices on a chip that acts like a UPC code is more than UPC because this microchip can carry much more dynamic information. This inexpensive microchip that can be embedded in any object stores basic information about the item. With in-expensive scanners within a range of a few feet (2 to 5 feet), you can read the information stored in these microchips. In future, we can see, this information being modified.
RFID employs Radio Frequency Communications to exchange data between the memory chip and a host computer. An Radio frequency identification system typically consists of a "Tag/Label/PCB" containing data storage, an Antenna to communicate with the Tag, and a Controller to manage the communication between the Antenna and the PC
Types of RFID Tags
- Passive read-only tags - Used for over 10 years - cost has dropped to 25 cents - will go down further
- Active tags containing memory chip (as high as 1Mbyte- contain info on what is contained inside a box, container or pallet - prices around $3.00 in 2001 - will drop further in 2002.
- More sophisticated and intelligent devices like Savi's RFID-GPS combination - a few hundred dollars a piece