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RFID
Components
RFID Tags
RFID tags are attached
on objects, to identify them and can
store information. Tags are classified
based on their characteristics.
 Active
and Passive tags
- Active
tags use a battery to power its
chip,
- Passive
tags use the energy of the RF
signal from readers.
Frequencies
- Low Frequency
(LF) – 125 KHz
- High
Frequency (HF) – 13.56 MHz
- Ultra
High Frequency (UHF) – 433 to
960 MHz – region specific
- Microwave
– 2.4 to 5 GHz Dual Frequency
(DF) – power up at 125 KHz & Backscatter
at 6.8 MHz
Read/Write
capability
- Read
Only
- Write
Once Read Many
- Write
Many Read Many
Tag/Reader
Communication Protocols
- Reader
talks first
- Tag talks
first
RFID Readers
RFID readers
consist of a transmitter, receiver,
antennae and a decoder. They communicate
with RFID tags, identify them and
retrieve data stored on the tag. Different
types of RFID readers:
-
Fixed readers - Entry/Exit,
Conveyer etc
-
Mobile readers - handheld
readers, forklift readers etc
-
Dual Barcode and RFID
readers
RFID Antennae
Apart from
the antennae that is present in a
tag an antennae is required between
the reader and a tag to enable communication.
The antennae can either be built in
to the reader or it can be a powerful
external antenna that can enhance
the read range and quality of RF communication.
Most
real scenarios require external antennae
to direct the RF signal and provide
comprehensive coverage of the area.
RFID Middleware
RFID Middleware is an intelligent
toolset of software modules that transforms
real-time data collected by RFID hardware
into relevant operational information
for instant and informed decision
making.
Functions
of Middleware
- Filter
the huge data collection and transform
into relevant information
- Seamless
integration with existing Business
Systems
- ERP
- CRM
- WMS
/ SCM
- Departure
Control Systems
- Workshop
Management Systems
- Others
- Specify
the required information to be
collected from the RFID environment
- Effectively
manage data network infrastructure
based on defined business logic
- Ease
scalability of RFID application
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Related
links on RFID Technology
RFID
Overview
RFID
Components
RFID
vs. BARCODES
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