Smart Labels and RFID 

Smart Labels RFID
What is RFID? 
· Radio frequency identification, or RFID, is a generic term for technologies that use radio waves to 
automatically identify people or objects. 
· There are several methods of identification, but the most common is to store a serial number that 
identifies a person or object, and perhaps other information, on a microchip that is attached to an 
antenna (the chip and the antenna together are called an RFID transponder or an RFID tag). 
· The antenna enables the chip to transmit the identification information to a reader. 
· The reader converts the radio waves reflected back from the RFID tag into digital information that 
can then be passed on to computers that can make use of it. 
· An RFID system consists of a tag, which is made up of a microchip with an antenna, and an 
interrogator, or reader with an antenna. The reader sends out electromagnetic waves. The tag 
antenna is tuned to receive these waves. 
· A passive RFID tag draws power from the field created by the reader and uses it to power the 
microchip’s circuits. The chip then modulates the waves that the tag sends back to the reader 
and the reader converts the new waves into digital data for use in the 
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