RFID technology uses radio waves to automatically identify objects. An RFID system consists of RFID tags attached to objects, RFID readers to interrogate tags, and an application system. There are three main types of tags: passive, semi-passive, and active. RFID is currently used in applications like credit cards, electronic toll collection, and access control. A survey found positive views of RFID's contactless reading, large data capacity, and ability to update tag data, though costs remain high and standards are still developing.
2. Future
Introduction Survey development
Applications Conclusion
of RFID Results and
opportunities
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3. RFID = Radio Frequency Identification
Electronic labeling and wireless identification
of objects using radio frequency
Tag carries with its information
a serial number
Model number
Color or any other imaginable data
When these tags pass through a field generated
by a compatible reader, they transmit this
information back to the reader, thereby
identifying the object
4. A basic RFID system consists of these
components:
A programmable RFID tag/inlay for storing item
data;
Consisting of an RFID chip for data storage
an antenna to facilitate communication with the RFID
chip
A reader/antenna system to interrogate the
RFID inlay
Application software and a host computer
system
5. The RFID tag consists of an integrated circuit
(IC) embedded in a thin film medium.
Information stored in the memory of the RFID
chip is transmitted by the antenna circuit
embedded in the RFID inlay via radio
frequencies, to an RFID reader
3 types
Passive
Semi-passive
Active
6. •Use a battery •Contain built-in •Derive their power
Active Tags
Semi-passive Tags
Passive Tags
•communicate over batteries to power the from the field
distances of several chip’s circuitry, resist generated by the
meters interference and reader
circumvent a lack of •without having an
power from the active transmitter to
reader signal due to transfer the
long distance. information stored
•They are different
from active tags in
that they only
transmit data at the
time a response is
received
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15. Positive
RFID is a contactless reading
technology and can read through
other materials
Hold more data than barcode does
RFID tags data can be changed or
added
More effective, bring lots of
convenience to us
Negative
Cost is relatively remain high
(compare to barcode)
RFID signals may have problems with
some materials
RFID standards are still being
developed
10/16/2012
