|You've been bar coding
for years now & thought it was the latest technology only
to be told that RFID is now the latest and greatest
way to track and identify. Is it time to make a transition? For
some companies and organizations the answer is yes; for others,
RFID will never be practical or even desirable.
First of all, what is RFID? In general terms,
there are two types of RFID transponders- passive
simple terms, a Passive RFID tag is just that-
passive. It just sits there and does nothing unless it is awakened.
If a reader is nearby it comes to life:
- The Passive
RFID tag only
activates when a reader is nearby to supply power
- The reader sends
out a radio frequency (RF) signal
- The antennae on
the tag produces a small amount of power from the magnetic
field that results from the RF (radio frequency) signal
- A response is
transmitted from the tag back to the to the reader
of Passive RFID
RFID tags have their own internal power source that
can generate a signal a great distance from a reader.
- The Active
RFID tag incorporates
a battery for power
RFID tags are more effective over distance,
through water, etc.
of Active RFID