Home Internet of Things Aerospace Apparel Energy Defense Health Care Logistics Manufacturing Retail

Ask The Experts Forum

BlogsAsk The Experts ForumHow Can I Use RFID Antennas as Pointers to Read Tags?

How Can I Use RFID Antennas as Pointers to Read Tags?

Posted By RFID Journal, 03.18.2014

I would like to utilize the antennas to interrogate tags that are very close to each other—only a few millimeters from one tag to the next. How would I do this?

—Name withheld

———

A passive low-frequency (LF), high-frequency (HF) or ultrahigh-frequency (UHF) system allows you to read a large number of tags close to one another, in rapid succession, without much difficulty. But it sounds like you want to know the location of a particular tag versus that of another, which is something an RFID system cannot easily do.

Passive RFID technology can tell you that a tag is in the read field, but not where precisely where within that field. The only way to determine the location of one tag or another would be to create a grid of very small reader antennas. You would then know which antenna had read the tag, and thus where that tag was located. This is not usually very practical, however, since you would need to have the small antennas custom-manufactured—and you would also need several readers to run the antennas, depending on how many squares you had in the grid.

—Mark Roberti, Founder and Editor, RFID Journal

Login and post your comment!

Not a member?

Signup for an account now to access all of the features of RFIDJournal.com!

Next Post
How Many Passive Tags Can Standard Reade...
Previous Post
Can RFID Be Applied to Jewelry?
PREMIUM CONTENT
Case Studies Features Best Practices How-Tos
RFID JOURNAL EVENTS
Live Events Virtual Events Webinars
ASK THE EXPERTS
Simply enter a question for our experts.
TAKE THE POLL
JOIN THE CONVERSATION ON TWITTER
Loading
RFID Journal LIVE! RFID in Health Care LIVE! LatAm LIVE! Brasil LIVE! Europe RFID Connect Virtual Events RFID Journal Awards Webinars Presentations
© Copyright 2002-2016 RFID Journal LLC.
Powered By: Haycco