|Home||Internet of Things||Aerospace||Apparel||Energy||Defense||Health Care||Logistics||Manufacturing||Retail|
Ask The Experts Forum
BlogsAsk The Experts ForumHow Can I Contain RFID Signals So They Do Not Interfere With Other Devices?
How Can I Contain RFID Signals So They Do Not Interfere With Other Devices?
And how can I prevent the reading of tags that I don't want interrogated?
Those are often two different issues.
There are several ways in which to contain RFID signals. Some companies build Faraday cages, which are typically metal mesh enclosures that block radio waves. These enclosures—named after British scientist Michael Faraday, who invented them—can be built around a conveyor belt so that passing items can be read without causing interference with nearby equipment. Enclosures can be built using any material that reflects radio waves, including Mylar.
Preventing extraneous reads on a mobile or handheld reader is a different issue. Passive ultrahigh-frequency (UHF) radio waves are emitted from a reader's antenna, much like light from a flashlight. The energy can be focused to some degree, but the waves can bounce off metal objects, causing tags to be read that you don't want interrogated. Some companies have developed software algorithms that measure signal strength and filter out weak signals, since those would likely be extraneous tags that you wouldn't want read.
—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!
SEND IT YOUR WAY
RFID JOURNAL EVENTS
ASK THE EXPERTS
Simply enter a question for our experts.
TAKE THE POLL
|RFID Journal LIVE!||RFID in Health Care||LIVE! LatAm||LIVE! Brasil||LIVE! Europe||RFID Connect||Virtual Events||RFID Journal Awards||Webinars||Presentations|