Smart (RFID) Labels
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, which 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 ntenna 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 application.