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Evaluation of EMI risk due to the interaction between cellular phones and medical devices
Author(s) -
Chen HsingYi,
Chou ChengYi
Publication year - 2010
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.25221
Subject(s) - emi , electromagnetic interference , electric field , interference (communication) , microwave , electrical engineering , isotropy , acoustics , cellular network , antenna (radio) , engineering , optics , physics , telecommunications , channel (broadcasting) , quantum mechanics
The FDTD method was used to calculate the electric fields emitted from cellular phones.Cellular phones were modeled by a quarter‐wavelength monopole antenna mounted on a rectangular box with equivalent material in the interior of the rectangular box and a dielectric coating in the exterior of the rectangular box. Measurements of the electric fields emitted from cellular phones were also performed by using a Narda Model SRM‐3000 high frequency selective radiation meter with an isotropic E ‐field probe. From measurement and simulation results, electric fields emitted from cellular phones are in the range of 0.02–39.0 V/m for separation distances of 0–3 m between handsets and test points. It is found that field strengths emitted from cellular phones may meet the recommended EMI immunity level of 3 V/m set by the IEC for medical equipment keeping a separation distance of more than 1 m from cellular phones. An interference threshold separation distance of 3 m is proposed for evaluating the interaction between cellular phones and medical devices. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1449–1454, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25221