Tag and reader communicate wirelessly and the tag
has built-in memory IC circuit microprocessor and
antenna. It is divided into active tag and ‘passive tag’
by the source of energy in the tag. The active tag has
the power supplier in it so that it can be recognized
from a long distance rather than passive tag which gets
power through an induced current. The built-in antenna
in reader constantly radiates electric waves and ID and
data of the tag get in the coverage, the tag information
transmits to antenna of reader.