|Home||Internet of Things||Aerospace||Apparel||Energy||Defense||Health Care||Logistics||Manufacturing||Retail|
Ask The Experts Forum
How Are RFID Devices Regulated?
What output levels per antenna are possible with passive UHF RFID readers that have multiple ports supporting multiple antennas?
Each country regulates RF devices differently. In the United States, the Federal Communication Commission (FCC) limits the maximum transmitter power to 1 watt for systems that frequency-hop across at least 50 channels, which most ultrahigh-frequency (UHF) EPC Gen 2 RFID readers do. For a 1-watt reader transmitter, the maximum antenna gain is 6 decibels (6 dBI). I reached out to Sanjiv Due, the president of training and consulting firm RFID4U, to ask about readers with multiple antennas. According to Sanjiv, since every antenna in a multiport reader fires separately, thanks to multiplexing within that reader, each antenna can still have a gain of 6 dBI.
—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.
|RFID Journal LIVE!||RFID in Health Care||LIVE! LatAm||LIVE! Brasil||LIVE! Europe||RFID Connect||Virtual Events||RFID Journal Awards||Webinars||Presentations|