Study of the coupling between human head and cellular phone helical antennas

Koulouridis, S; Nikita, KS

dc.contributor.author	Koulouridis, S	en
dc.contributor.author	Nikita, KS	en
dc.date.accessioned	2014-03-01T01:21:32Z
dc.date.available	2014-03-01T01:21:32Z
dc.date.issued	2004	en
dc.identifier.issn	0018-9375	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16255
dc.subject	Biological effects of electromagnetic radiation	en
dc.subject	Helical antenna	en
dc.subject	Human head of adults and children	en
dc.subject	Mobile phone	en
dc.subject	Semi-analytical and finite-difference time-domain (FDTD) techniques	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Telecommunications	en
dc.subject.other	Biological radiation effects	en
dc.subject.other	Cellular telephone systems	en
dc.subject.other	Computational methods	en
dc.subject.other	Computer simulation	en
dc.subject.other	Finite difference method	en
dc.subject.other	Green's function	en
dc.subject.other	Helical antennas	en
dc.subject.other	Mobile telecommunication systems	en
dc.subject.other	Time domain analysis	en
dc.subject.other	Cellular phone helical antennas	en
dc.subject.other	Human head	en
dc.subject.other	Specific absorption rates	en
dc.subject.other	Electromagnetic compatibility	en
dc.title	Study of the coupling between human head and cellular phone helical antennas	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/TEMC.2004.823612	en
heal.identifier.secondary	http://dx.doi.org/10.1109/TEMC.2004.823612	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	The interaction between normal-mode helical antennas and human head models is analyzed, using both a novel accurate semi-analytical method and finite-difference time-domain (FDTD) simulations. The semi-analytical method is based on the combination of Green's functions theory with the method of moments (Green/MoM) and is able to model arbitrarily shaped wire antennas radiating in the close proximity of layered iossy dielectric spheres representing simplified models of the human head. The purpose of the development of the Green/MoM technique is to provide a reliable tool for preliminary (worst case) estimation of human head exposure to the field generated by different antenna configurations with emphasis on the helical antenna, representing the most diffused antenna type used in modern cellular handsets. Furthermore, the accurate semi-analytical character of the Green/MoM technique permits the accuracy assessment of purely numerical techniques, such as the FDTD, which is currently the most widely used computational method in mobile communication dosimetric problems, since it allows modeling of anatomically based head models. After appropriate benchmarking, FDTD simulations are used to study the interaction between a heterogeneous anatomically correct model of the human head exposed to a normal-mode helix monopole operating at 1710 MHz mounted on the top of a metal box representing a realistic mobile communication terminal. The study of both canonical and realistic exposure problems includes computations of specific absorption rates (SARs) inside the human head, total power absorbed by the head and assessment of antenna performance. Emphasis is placed on the comparative dosimetric assessment between adults and children head models.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	IEEE Transactions on Electromagnetic Compatibility	en
dc.identifier.doi	10.1109/TEMC.2004.823612	en
dc.identifier.isi	ISI:000220176400007	en
dc.identifier.volume	46	en
dc.identifier.issue	1	en
dc.identifier.spage	62	en
dc.identifier.epage	70	en