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Article
Publication date: 1 April 1995

N.C. Skaropoulos and D.P. Chrissoulidis

We determine the electromagnetic (EM) field in a layered eccentric spheres model of the human head. The model allows for eccentricity between the inner and the outer sets of the…

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Abstract

We determine the electromagnetic (EM) field in a layered eccentric spheres model of the human head. The model allows for eccentricity between the inner and the outer sets of the concentric spherical layers that simulate brain and skull. Excitation is provided by an incident plane EM wave or by a nearby dipole. The induced EM field is determined through a compact formulation based on indirect mode matching. Numerical results are presented for models adapted to adult and infant heads. Interest is in the RF/microwave absorption characteristics of the head. Conditions for hot spot occurence are investigated too. Applications include EM hyperthermia and cellular phone side‐effects.

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COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 14 no. 4
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 1 December 2000

C.S. Antonopoulos, Em.E. Kriezis and E.E. Kriezis

The path integral analysis has been used to examine the propagation of a Gaussian beam in two cases. First in free space and second in a space with a non‐penetrable obstacle…

2398

Abstract

The path integral analysis has been used to examine the propagation of a Gaussian beam in two cases. First in free space and second in a space with a non‐penetrable obstacle, placed parallel to the direction of propagation. Full analytical equations have been given in both cases and results have been taken in the same spatial coordinates in order to facilitate comparisons. No numerical instabilities have been observed and the method seems to be quite tractable and easily extended in spaces with more that one obstacle.

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COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 19 no. 4
Type: Research Article
ISSN: 0332-1649

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