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RFID
Technology Overview
RFID or Radio Frequency
Identification is the Auto-ID technology
by which one can identify objects
and track information about them wirelessly
using radio waves.
In the simplest terms
an RFID system consists of a TAG (transponder)
and a READER (interrogator). The technology
of RFID deals with the remote collection
of information stored on a tag using
radio frequency communications. Information
stored on the tag can range from as
little as an identification number,
to kilo-bytes of data written to and
read from the tag, to dynamic information
maintained on the tag, such as temperature
histories. The information from the
tag/reader combination is either presented
to a human operator typically using
a hand-held device or a host computer
which automatically manages the information.
Critical performance
variables of an RFID system determine
the cost of implementation.
- Read
Range - Range at which communication
can be maintained
- Memory
- Size of the information space
contained on the tag
- Speed
- The rate at which the communication
with the tag can take place
- Size
- The physical size of the tag
- Simultaneous
read - The ability of the system
to "simultaneously" communication
with multiple tags
- Interference
- The reliability of communication
with respect to interference due
to material in the path between
the reader and the tag
- Accuracy
- Read success rate especially in
presence of many tags
- Life
& Re-use - Tags should be
robust to handle harsh temperatures
and environments. Battery life limits
life of tag.
Several factors determine
the level of performance that can
be achieved in these variables.
- Legal/regulatory
emission levels allowed in the country
of use.
- Battery
is included in the tag to assist
its communication or not.
- Frequency
of the RF carrier used to transport
the information.
The main components
involved are
- RFID
tags - attached on objects to
identified and contain information
- RFID
readers - generates and RF signal
to identify RFID tags
- Antennae
- Carries the RF signal to identify
tags
- Aggregation
Software - Collects the required
data
- RFID
Middleware
- Filter
the enormous data and convert
it into information.
- Integration
with backend business systems
(ERP, CRM, WMS, SCM etc.)
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Related
links on RFID Technology
 RFID
Overview
RFID
Components
RFID
vs. BARCODES
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More
links on RFID
RFID
Overview
RFID
Components
RFID
vs. BARCODES
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