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What Type of RFID Can Operate at a Frequency of 7 Teslas?

Posted By RFID Journal, 10.15.2019

How would a transponder function under such conditions?

—Shriram

———

Shriram,

There have been studies conducted regarding the effects of a magnetic resonance imaging (MRI) procedure on RFID tags, but I have never seen any tests studying how a transponder would work during the procedure, when it would be exposed to magnetic induction equal to 7 Teslas. Since passive HF and LF use electromagnetic induction to power tags, it is possible that the tags would not function at all. Magnetic induction typically doesn't affect radio waves, so a passive UHF transponder might work, but I am not an RF engineer so I cannot say for sure. If any RF engineers are able to provide a more educated response, they are welcome to do so below.

—Mark Roberti, Founder and Editor, RFID Journal

USER COMMENTS

Jack Falkner 2019-10-17 10:50:00 AM
Hi Mark: We did have some experience with a successful test of UHF RFID Linen Tag affixed to a patient garment through a hospital clinic 1.5T Philips MRI in 2015 in New Zealand. The Radiologist certified the tag had no magnetic properties and did not have any adverse effect on the images performed with an MRI phantom and no damage to the tag itself. Hope this helps Best Regards, Jack Falkner

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