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SAR / Device Absorption108 citations

Characterization of the electromagnetic near-field absorption in layered biological tissue in the frequency range from 30 MHz to 6000 MHz Phys.

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Christ A, Samaras T, Klingenböck A, Kuster N. · 2006

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The study identified two effects that can lead to increased SAR in layered tissue compared with homogeneous tissue simulants.

Plain English Summary

Summary written for general audiences

The study investigated electromagnetic near-field absorption in layered biological tissue from 30 MHz to 6000 MHz. Two effects can increase SAR in layered tissue versus homogeneous liquid: standing wave effects at larger distances depending on frequency and fat thickness, and high local skin absorption from reactive E-fields in the very close near-field. A conservative exposure estimate can be obtained by applying a multiplication factor of 1 to 3 to current dosimetric values.

Why This Matters

The latter effect occurs at lower frequencies and depends on the antenna type. Modifying the parameters of homogeneous liquids cannot compensate for these effects.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 30 MHz - 6 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 30 MHz - 6 GHzPower lines50/60 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study. The study examined exposure from: 30 MHz to 6000 MHz

Study Details

The aim of this study is to investigate Characterization of the electromagnetic near-field absorption in layered biological tissue in the frequency range from 30 MHz to 6000 MHz Phys.

This paper identifies two different effects which can lead to increased SAR in layered tissue in com...

The latter effect occurs at lower frequencies and depends on the antenna type. Modification of the p...

Cite This Study
Christ A, Samaras T, Klingenböck A, Kuster N. (2006). Characterization of the electromagnetic near-field absorption in layered biological tissue in the frequency range from 30 MHz to 6000 MHz Phys. Med. Biol.51: 4951-4965, 2006.
Show BibTeX
@article{a_2006_characterization_of_the_electromagnetic_1984,
  author = {Christ A and Samaras T and Klingenböck A and Kuster N.},
  title = {Characterization of the electromagnetic near-field absorption in layered biological tissue in the frequency range from 30 MHz to 6000 MHz Phys.},
  year = {2006},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/16985280/},
}
PubMed: 16985280

Cited By (108 papers)

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Quick Questions About This Study

The study aimed to characterize electromagnetic near-field absorption in layered biological tissue from 30 MHz to 6000 MHz.
Standing wave effects at larger distances depending on frequency and fat layer thickness, and high local skin absorption from reactive E-field components in the very close near-field.
By applying a multiplication factor between 1 and 3 to values from current experimental dosimetric techniques.
In the very close near-field at distances approximately lambda/40.
Modification of the parameters of the homogeneous liquids cannot compensate for these effects.