An upper bound on coefficient of transmission of microwave leakage into biological tissues
Kamal AA, Al-Badwaihy K, Hashish E · 1976
The study found that near-field dipole sources can produce transmission coefficients into biological tissues that exceed plane-wave assumptions, especially at low dipole heights.
Plain English Summary
Researchers modeled microwave transmission into a planar half-space of biological tissue using elementary electric and magnetic dipoles as sources. They computed the transmission coefficient U for four dipole configurations and found that its maximum value increases and shifts toward the dipole projection as the dipole height decreases. The authors state that near-zone fields may be hazardous even below current standard safe levels because they can have higher transmission coefficients than assumed plane-wave exposures.
Why This Matters
The incident field was decomposed into a continuous spectrum of cylindrical waves, and the transmitted field for each component was integrated to obtain the total transmitted field. The transmission coefficient U was defined as the ratio of transmitted to incident field and plotted for a wide range of parameter values. The method allows extension to complex nearby sources by analyzing their fields as collections of electric and magnetic dipoles, enabling an upper limit for incident field as a function of source height.
Show BibTeX
@article{an_upper_bound_on_coefficient_of_transmission_of_microwave_leakage_into_biologic_g6713,
author = {Kamal AA and Al-Badwaihy K and Hashish E},
title = {An upper bound on coefficient of transmission of microwave leakage into biological tissues},
year = {1976},
}