volume | PIER Journals

2011-03-29

Numerical Study of the Thermal Effects Induced by a RFID Antenna in Vials of Blood Plasma

Ruben Otin

Dr. Ruben Otin

Electromagnetism

CIMNE-International Center for Numerical Methods in Engineering

Spain

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Progress In Electromagnetics Research Letters, Vol. 22, 129-138, 2011

doi:10.2528/PIERL11021002

Abstract

This paper presents a numerical study of the thermal effects induced by a commercial RFID antenna in vials filled with blood plasma. The antenna is located under a conveyor belt which transports cardboard boxes bearing test tubes or pooling bottles. Part of the energy used to read the RFID tags penetrates into the vials and heats the plasma. Our aim is to assess if the RFID technology can alter the quality of the blood plasma by increasing excessively its temperature. To do so, we first compute the specific absorption rate inside the vials with the finite element method. Then, assuming that no heat dissipation process is present, we estimate the number of continuous reading cycles required to increase the plasma temperature 0.1°C in the worst-case scenario. Finally, we compare this number with the number of reading cycles required to obtain all the data from the tags under normal usage conditions.

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Ruben Otin, "Numerical Study of the Thermal Effects Induced by a RFID Antenna in Vials of Blood Plasma," Progress In Electromagnetics Research Letters, Vol. 22, 129-138, 2011.
doi:10.2528/PIERL11021002

References

1. Arumugam, D. D. and D. W. Engels, "Specific absorption rates in the human head and shoulder for passive UHF RFID systems," Int. J. Radio Frequency Identification Technology and Applications, Vol. 2, No. 1-2, 1-26, 2009.
doi:10.1504/IJRFITA.2009.023481

2. Bassen, H., "Liquid pharmaceuticals and 915MHz radiofrequency identification systems, worst-case heat-ing and induced electric fields," RFID Journal, http://www.rfidjournal.com/whitepapers/7/3, Sep. 2005.

3. Dobkin, D. M., S. M. Weigand, and N. Iye, "Segmented magnetic antennas for near-field UHF RFID," Micro. J., Vol. 50, No. 6, 2007.

4. Federal Communications Commission (FCC) "Body tissue dielectric parameters,", http://www.fcc.gov/oet/rfsafety/dielectric.html, 2010.

5. Hinhofer-Szalkay, H., "Method of high-precision microsample blood and plasma mass densiometry," J. Appl. Physiol., Vol. 60, No. 3, 1082-1088, 1986.

6. Jaspard, F., M. Nadi, and A. Rouane, "Dielectric properties of blood: An investigation of haematocrit dependence," Physiol. Meas., Vol. 24, No. 1, 137-147, 2003.
doi:10.1088/0967-3334/24/1/310

7. Kashyap, S. C., "Dielectric properties of blood plasma," Electron. Lett., Vol. 17, No. 19, 713-714, 1981.
doi:10.1049/el:19810500

8. Otin, R., "Regularized Maxwell equations and nodal finite elements for electromagnetic field computations," Electromagnetics, Vol. 30, No. 1-2, 190-204, 2010.
doi:10.1080/02726340903485489

9. Qing, X., C. K. Goh, and Z. N. Chen, "Segmented loop antenna for UHF near-field RFID applications," Electron. Lett., Vol. 45, No. 7, 872-873, 2009.
doi:10.1049/el.2009.0326

10. Sanchis, A., J. Espinosa-Garia, and A. Martin, "Numerical simulation of EM environment and human exposure when using RFID devices," PIERS Online, Vol. 6, No. 7, 651-654, 2010.
doi:10.2529/PIERS091219152348