This is great information.
Thank you for providing some details.
The comment: "had an 868-MHz reader (2-4 W). " is informative. It
indicates that the RFID was not the only transmitter in the proximity of the
medical EUT. This RFID reader adds another parameter that requires control
and investigation during the test.
continuing the list of possibilities:
f) is it possible that the RFID tag has much less effect than that of the
RFID reader?
Would be informative to find out if the RFID reader, in the absence of the
tags themselves, can duplicate any of the EUT problems.
Best Regards,
Patrick.
[email protected]
________________________________
From: [email protected] [mailto:[email protected]] On Behalf Of Dean Gerard
(Medical Physics)
Sent: Friday, June 27, 2008 11:48 AM
To: [email protected]
Subject: FW: EMC in the news: RFID & Medical
Just nominal power outputs and separation distances between interfering and
susceptible equipment.
Output info given is -
"The passive RFID system selected for this study (OBID, Feig Electronic,
Weilburg, Germany) had an 868-MHz reader (2-4 W). The active RFID system
(Eureka RFID, Avonwood, England) had a 125-kHz reader (68_10E-3 µT at 1m)
that forces tags to transmit in its proximity. The active RFID tag had an
operational frequency of 868 MHz at 2 µW"
Interference effects were provoked at separation distances ranging from 5 -
600cm, depending upon equipment affected.
Ged Dean
Nottingham University Hospitals NHS Trust
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