How
does RFID work?
Basic
RFID system [2]
The
figure above shows an overview of a RFID system. A simple RFID system consists of a RFID
reader and a RFID tag. And, inside
of each sophisticated tags there then consists of a radio transmitter and radio
receiver. This enables a RFID
reader and a RFID tag communicates each other through a specified radio
frequency. There are three main
roles a RFID reader plays other than signaling RFID tag to transmit desired
information back to the RFID reader.
Firstly, a RFID reader has the responsibility of keeping RFID tags
powered up. Secondly, a RFID reader
demodulates incoming signals from the RFID tag down. This process slows the incoming signals
down enough so that the RFID reader is able to process the signals. Finally, after the incoming signals are
slowed down, RFID then has the responsibility of decoding the incoming signals
into the words people can interpret.
Both a RFID reader and a RFID tag can be easily made into almost any
desired shape and size. Because of
the versatility, RFID system can almost fit into wherever needs a field needs
to identify, track, and manage objects, maybe even people, or animals. [2]