RFID uses radio waves to electronically identify objects. An RFID tag contains information that is transmitted to an RFID reader when within range of its radio waves. A basic RFID system consists of tags containing chips and antennas to transmit data, readers and antennas to interrogate tags, and application software. There are three main types of tags: passive, semi-passive, and active. RFID is used in various applications like supply chain management, electronic toll collection, access control, and more. While it provides benefits over barcodes like contactless reading and rewritable data, RFID also faces challenges like higher costs and developing standards.
1. Chan Lok Wun (12205257)
Yiu Ka Lai (12211397)
4 MARCH 2013
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7. 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
8. 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
9. 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
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11. Frequency Appx. Read Range Data Speed Cost of Application
Tags
Low Frequency <5cm Low High • Animal Identification
(125kHz)
(passive) • Access Control
High Frequency 10 cm – 1m Low to Moderate Medium • Smart Cards
(13.56 Mhz) to Low
(passive) • Payment (paywave)
Ultra High Frequency 3m -7m Moderate to High Low • Logistics and Supply Chain
(433, 868-928 Mhz)
(passive) • Baggage Tracking
Microwave (2.45 & 10m -15m High High • Electronic toll collection
5.8 Ghz) (Autotoll)
(passive)
• Container Tracking
20m – 40m
(active)
19. 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
