The term RFID refers to Radio Frequency Identification, a technology which uses radio waves to
automatically identify items or people. Most commonly this involves the use of an RFID tag and a
In general terms, Radio Frequency Identification systems consist of an RFID tag (typically many tags)
and an interrogator or reader. The interrogator emits a field of electromagnetic waves from an antenna,
which are absorbed by the tag. The absorbed energy is used to power the tag's microchip and a signal
that includes the tag identification number is sent back to the interrogator.