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| RFID systems with encoded identification information are
attached to objects such as badges, automobiles, goods, and
livestock, and their information can be decoded without making
physical contact of a radio communication device. RFID systems
can automate a number of existing applications in industry as
a whole as well as in our daily lives. |
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| To get a clearer picture of RFID, let us compare it with
barcoding. RF tags (largely divided into RF tags and RF cards)
are to an RF reader what labels on barcodes are to a
scanner/decoder. |
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| Just as a barcode scanner reads data by scanning labels,
an RF reader reads data by sending and receiving radio signals
to and from the RF tags, or transponders, without making
contact. |
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 RFID requires neither direct
contact nor line of sight |
| RFID identifies and reads data
very fast |
| RFID requires virtually no
maintenance. |
| RFID achieves almost 100%
precision. |
| RFID works even in
dust/paint/vapor/mud/water/plastic/wood/glass/grease. |
| If recycled, RF tags cost less
than barcoding. |
| RF tags are semi-permanent
because they are contact free and therefore free from failure
caused by a malfunctioning
reader. |
| RF tags can perform
intelligently (like a smart card) |
| RF tags can send or receive a
large volume of data. |
| RF tags can store or read
data. |
| RF tags can be used in an
extremely hostile environment. |
| RF tags can be used in flexible
positions of an object. |
| Data in RF tags cannot be
forged or modified, ensuring perfect security. Making
counterfeit RF tags is
difficult. |
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| RFID tags consist of an antenna,
receiver/transmitter, and an RF tag also known as a
transponder. The functions of these components are as
follows. |
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| The antenna mediates between the tag and the
receiver/transmitter. It sends a radio signal to enable or
disable the tag, and read and write data. |
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| RFID tags come in various shapes and sizes. They are
divided into active tags and passive tags depending on whether
they have a power supply, and into low-frequency systems and
high-frequency systems depending on the frequency bands
used |
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