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| Product > RFID |
| What is RFID _____________________________________________________________ |
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| 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. |
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How
does an RFID system work? ___________________________________________ |
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An
RFID system consists of a tag 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, which converts
the new waves into digital data. For more information on
the components of a complete system used in businesses,
see Getting Started. |
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