Analysis of the interaction between a layered spherical human head model and a finite-length dipole

Nikita, KS; Stamatakos, GS; Uzunoglu, NK; Karafotias, A

dc.contributor.author	Nikita, KS	en
dc.contributor.author	Stamatakos, GS	en
dc.contributor.author	Uzunoglu, NK	en
dc.contributor.author	Karafotias, A	en
dc.date.accessioned	2014-03-01T01:15:28Z
dc.date.available	2014-03-01T01:15:28Z
dc.date.issued	2000	en
dc.identifier.issn	0018-9480	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13528
dc.subject	biological effects of electromagnetic radiation	en
dc.subject	dipole antennas	en
dc.subject	electromagnetic coupling	en
dc.subject	Green's function	en
dc.subject	mobile communication	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.other	PLANE-WAVE	en
dc.subject.other	NEAR-FIELD	en
dc.subject.other	HOT SPOTS	en
dc.subject.other	ABSORPTION	en
dc.subject.other	EXPOSURE	en
dc.subject.other	ANTENNA	en
dc.subject.other	SPHERES	en
dc.subject.other	SAR	en
dc.subject.other	TRANSCEIVERS	en
dc.subject.other	IRRADIATION	en
dc.title	Analysis of the interaction between a layered spherical human head model and a finite-length dipole	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/22.884189	en
heal.identifier.secondary	http://dx.doi.org/10.1109/22.884189	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	The coupling between a finite-length dipole antenna and a three-layer lossy dielectric sphere, representing a simplified model of the human head, is analyzed theoretically in this paper. The proposed technique is based on the theory of Green's functions in conjunction with the method of auxiliary sources (MAS), The Green's function of the three-layer sphere can be calculated as the response of this object to the excitation generated by an elementary dipole of unit dipole moment. The MAS is then applied to model the dipole antenna by distributing a set of auxiliary current sources on a virtual surface lying inside the antenna physical surface, By imposing appropriate boundary conditions at a finite number of points on the real surface of the antenna, the unknown auxiliary sources coefficients can be calculated and, hence, the electric field at any point in space can be easily obtained. Numerical results concerning the specific absorption rate inside the head, the total power absorbed by the head, the input impedance, and the radiation pattern of the antenna are presented for homogeneous and layered head models exposed to the near-field radiation of half-wavelength dipoles at 900 and 1710 MHz, The developed method can serve as a reliable platform for the assessment of purely numerical electromagnetic methods. The method can also provide an efficient tool for accurate testing and comparison of different antenna designs since generalizations required to treat more complex antenna configurations are straightforward.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES	en
dc.identifier.doi	10.1109/22.884189	en
dc.identifier.isi	ISI:000165390500005	en
dc.identifier.volume	48	en
dc.identifier.issue	11	en
dc.identifier.spage	2003	en
dc.identifier.epage	2013	en