Radio frequency identification technology (RFID) Dominic Payne Janna Thomson Kevin Mackay

Definition A method of identifying unique items using radio waves. Typically, a reader communicates with a transponder, which holds digital information in a microchip. There are chipless forms of RFID tags that use material to reflect back a portion of the radio waves beamed at them

History Discovered in 1935 by Scottish physicist Sir Robert Alexander Watson-Watt First passive RFID used in WW2 Used to track nuclear materials in 70’s Developed a low-frequency (125 kHz) system, featuring smaller transponders Moved up the spectrum to 13.56MHz offering greater range an quicker data transfer rates David Brock and Sanjay Sarma, put low-cost RFID tags on all products used as a tracking device Wal-Mart requires all of its suppliers to put RFID tags carrying Electronic Product Codes on pallets and cases Used today in car starters, payment control, smart cars etc.

Features -Gives each product their own unique identifying number -Transfer information from a device to a reader through radio frequency waves 3 Major components: 1) RFID Tag 2)RFID Reader 3)Non-physical pre-defined protocol 2 Primary RFID systems: 1)Passive 2)Active

Function Inventory Management and Asset Tracking -Manufacturing -Supply chain -Managment -Retailing -Payment systems -Security And Access -Control

Benefits Small in size Some have no power source Not required that the RFID tag is shown Can be read hundreds of times Allows companies to eliminate roles

Disadvantages Short range for the Passive RFID Do not carry intrinsic information Sensitive to other radio interferences Can be costly

Summary Small accurate tracking device Unique Quick transfer of data Inexpensive future

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