Discussion in 'The Projects Forum' started by Cerkit, Dec 7, 2009.
Anyone know an rfid system which has a range of >200m?
The transponders used in RFID are passive. They harvest energy from the interrogation pulse in order to send a signal back. So the inverse square law makes ranges of anything like 200m very unlikely.
I think a range upto 1 m should be possible.
The frequency is also of influence of the range.
Here is an article on RFID and range:
An active system like GPS localisation will have an "unlimited" range.
What about active tags? Or is that not considered rfid anymore? What system could I use for awareness recognition that spans up to 200m?
Active RFID tags will only manage 100 meters.
See the following links:
Don't the transponders used in aircraft meet that definition?
Ok. What could I use that has approx a 1 metre radius of detection?