Energy deposition in biological tissue near portable radio transmitters at VHF and UHF
- 1 January 1977
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
This paper presents the results of measurements of temperature increase, due to RF energy deposition, in simulated biological tissue near 6 W portable transmitters with helical and whip antennas. At close distances (< .5'') VHF helices deposit energy in the surface fatty layers, with practically no penetration into muscle tissue; 450 MHz helical antennas transfer energy mostly into the surface fat, with the penetration into deep tissue increasing by a factor of 10 from 150 MHz. UHF quarter-wavelength whips deposit power mostly in the muscle tissue. At larger distances (> 2''), the detected temperature increases are extremely small, indicating that portable radios are safe.Keywords
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