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Millimeter wave power density in aqueous biological samples
Author(s) -
Alekseev S.I.,
Ziskin M.C.
Publication year - 2001
Publication title -
bioelectromagnetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.435
H-Index - 81
eISSN - 1521-186X
pISSN - 0197-8462
DOI - 10.1002/bem.52
Subject(s) - power density , materials science , dielectric , range (aeronautics) , optics , power (physics) , sample (material) , spectral density , millimeter , optoelectronics , composite material , physics , mathematics , statistics , quantum mechanics , thermodynamics
Power density distribution inside a water sample placed between two parallel lossy dielectric plates (Polystyrene) was calculated using Fresnel equations for the frequency range of 42.25–53.57 GHz. Due to the multiple internal reflections from the sample boundaries, the distribution of the power density within the thin sample is more uniform than that within a semi‐infinite medium. The power density in a sample depends on the thicknesses of the sample and the adjacent dielectric plates. For the given frequency range the sample thickness optimal for power density uniformity varies between 0.28 and 0.33 mm. The front plate has a significant effect on the magnitude of the power density within the sample but little effect on the power density distribution. The thicker the rear plate, the greater is the non uniformity of the power density distribution within the sample. Based on the calculated data, we determined the dimension of an exposure chamber providing the optimal power density distribution uniformity for mm‐wave irradiation. Bioelectromagnetics 22:288–291, 2001. © 2001 Wiley‐Liss, Inc.