Radiofrequency
identification, commonly called RFID, is an automatic identification
application that consists of a reader that transmits a signal at a specified
frequency to one or more radio tags located in its reading field. These can be
obtained with the RF Hard tag dealers in Kolkata.
When
the labels are "woken up" by the reader, a dialogue is established
according to a predefined communication protocol and the data is exchanged.
Reliable
Identification
It
makes it possible to reliably and uniquely identify a person, an animal or an
object. An RFID system thus makes it possible to write, store and erase
information on the electronic chip of the tag. In addition to the non-contact
data transfer, the communication via the antenna also allows blind transfers
between the reader and the label through light-opaque materials, which can be
read simultaneously on several labels.
Standardized
Equipment
For
interoperability, the RFID equipment (readers and tags) must be standardized in
terms of their operating mode or, for a given frequency of use, any tag read by
any reader. This is called communication protocol (ISO Standard)
Two Components
The support
The
electronic tag is an information medium that combines the processing of a
signal and the storage of data. It consists of an electronic circuit (or
"integrated circuit"), broadcast on a printed circuit and coupled to
an antenna.
Often
called "transponder" (transmitter/responder) because of their
response and transmission functions, the tag - radio or tag responds to a
request transmitted by the reader and concerning the data it contains.
The Reading
The
base station emits radio waves in a space of a few centimeters to several tens
of meters, depending on the power of the power supply and the radio frequency
used. When an RF tag passes into the electromagnetic field, it detects the
signal from the base station.