Send to

Choose Destination
Phys Med Biol. 2009 Jan 21;54(2):227-41. doi: 10.1088/0031-9155/54/2/004. Epub 2008 Dec 16.

Variation of the dielectric properties of tissues with age: the effect on the values of SAR in children when exposed to walkie-talkie devices.

Author information

Physical Dosimetry Department, Health Protection Agency, Chilton, Didcot OX11 0RQ, UK.

Erratum in

  • Phys Med Biol. 2010 Sep 7;55(17):5249.


In vitro dielectric properties of ageing porcine tissues were measured in the frequency range of 50 MHz-20 GHz, and the total combined uncertainties of the measurements were assessed. The results show statistically significant reduction with age in both permittivity and conductivity of 10 out of 15 measured tissues. At microwave frequencies, the observed variations are mainly due to the reduction in the water content of tissues as an animal ages. The results obtained were then used to calculate the SAR values in children of age 3 and 7 years when they are exposed to RF induced by walkie-talkie devices. No significant differences between the SAR values for the children of either age or for adults were observed.

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for IOP Publishing Ltd.
Loading ...
Support Center