Unlike a
barcode, an RFID tag can be putinside any object and the reader can
still read the signal even when the tag is invisible. This capability
has placed RFID at the forefront of building embedded devices with
full tracking functionality. For instance, RFID tags can be embedded
in a meter, thereby making it a smart reading device. RFID tags are
used in many organizations. For example, an RFID tag attached to
an automobile during production can be used to track its progress
through the assembly line. The RFID microchips embedded in livestock
and pets allow the positive identification of animals. Such an
identification method enables the realization of smart city intelligent
devices through the RFID embedded technology.