From How Far Away Can RFID Tags Be Read?

By RFID Journal

  • TAGS
Ask The ExpertsFrom How Far Away Can RFID Tags Be Read?
RFID Journal Staff asked 13 years ago
What is the maximum distance that an RFID tag can be used effectively?


—Name withheld

———


With standard ultrahigh-frequency (UHF) systems, tags can be read from approximately 30 feet under ideal conditions. I have seen a passive UHF tag read from a distance of more than 300 feet, by Mojix‘s STAR system, which uses highly sensitive phased array antennas and e-nodes that energize the tag from a much closer distance.

Active RFID tags have a power source that enables them to broadcast a signal to an interrogator, rather than reflecting back energy from the reader. This allows for much longer read ranges—typically, 100 meters (328 feet). Some companies, such as Identec Solutions, have taken this further, by increasing the reader’s sensitivity to pick up a tag from even longer distances: up to 500 meters (1,640 feet).

—Mark Roberti




Login and post your comment!

Login
Register Now

Not a member?
Signup for an account now to access all of the features of RFIDJournal.com!

Previous Post

»