Smart Labels and 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