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Environmentalist

, Volume 25, Issue 2–4, pp 181–185 | Cite as

Limitations in the SAR Use

  • Hubert Trzaska
Article

Summary

The paper discusses several aspects of the practical application of the SAR. It is shown that the unit is an ideal solution for basic research and laboratory experiments. SAR is directly nonmeasurable unit. Although methods and devices based upon indirect SAR measurements may widen our knowledge about EM energy distribution and absorption within a body. It is shown that for practical applications the temperature SAR measurement methods are not sensitive enough while methods based upon E(H) measurement are less accurate than traditional approaches. As a result of assumption SAR = 4 W/kg as a basic restriction the present protection standards are illogical and nonrealiazable. A return to traditional units (E, H, S) in the standards and surveying metrology is suggested.

Keywords

SAR electromagnetic field measurements EMC exposure limits 

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References

  1. Black, D.: 2001, “Margins and Precautions in Ultra High Frequency RF Standards,” Proc. EBEA. Helsinki, pp. 24–26.Google Scholar
  2. Guidelines for Limiting Exposure to Time-varying Electric, Magnetic, and Electromagnetic Fields (up to 300 GHz),” 1998, ICNIRP Guidelines, Health Physics 74(4), 494–522.Google Scholar
  3. Trzaska, H.: 2002, “Keep out of the Western Protection Standards,” Proc. 3-rd Intl. Symp. on EMC, Beijing, pp. 35–38.Google Scholar
  4. NCRP Report No. 67, Radiofrequency Electromagnetic Fields. Properties, Quantities and Units, Biophysical Interaction, and Measurements. 1981, Wash. DC.Google Scholar

Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  1. 1.EM Environment Protection Lab.Techn. Univ. of Wroclaw, PolandWroclawPoland

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