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Electronics 2016, 5(4), 77; doi:10.3390/electronics5040077

A Numerical Estimation of a RFID Reader Field and SAR inside a Blood Bag at UHF

Department of Electrical and electronic Engineering (DIEE), University of Cagliari, Piazza d’Armi, 09123 Cagliari, Italy
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Academic Editors: Michael Sheng and Ali Shemshadi
Received: 23 September 2016 / Revised: 31 October 2016 / Accepted: 4 November 2016 / Published: 8 November 2016
(This article belongs to the Special Issue RFID Systems and Applications)
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Abstract

In this paper, the effects of UHF electromagnetic fields produced by a RFID reader on a blood bag are evaluated numerically in several configurations. The results of the simulation, field level and distribution, specific absorption rate (SAR), and heating time show that an exposure to a typical reader field leads to a temperature increase smaller than 0.1 C and to a SAR smaller than 1 W/kg. As a consequence, no adverse biological effects occur during a typical UHF RFID reading cycle on a blood bag. Therefore, the blood contained in a bag traced using UHF-RFID is as safe as those traced using barcodes. The proposed analysis supports the use of UHF RFID in the blood transfusion supply chain. View Full-Text
Keywords: antennas; biomedical communication; blood bag; radiofrequency identification; specific absorption rate (SAR); UHF RFID antennas; biomedical communication; blood bag; radiofrequency identification; specific absorption rate (SAR); UHF RFID
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Fanti, A.; Casu, S.; Mazzarella, G. A Numerical Estimation of a RFID Reader Field and SAR inside a Blood Bag at UHF. Electronics 2016, 5, 77.

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