Theoretical approach of the interaction between a human head model and a mobile handset helical antenna using numerical methods

Kouveliotis, NK; Panagiotou, SC; Varlamos, PK; Capsalis, CN

dc.contributor.author	Kouveliotis, NK	en
dc.contributor.author	Panagiotou, SC	en
dc.contributor.author	Varlamos, PK	en
dc.contributor.author	Capsalis, CN	en
dc.date.accessioned	2014-03-01T01:25:18Z
dc.date.available	2014-03-01T01:25:18Z
dc.date.issued	2006	en
dc.identifier.issn	1559-8985	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17637
dc.subject	fdtd method	en
dc.subject	Finite Difference Time Domain	en
dc.subject	Genetic Algorithm	en
dc.subject	Numerical Method	en
dc.subject	Specific Absorption Rate	en
dc.subject	Standing Wave	en
dc.subject	Method of Moment	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Physics, Applied	en
dc.subject.classification	Telecommunications	en
dc.subject.other	NEAR-FIELD	en
dc.subject.other	ABSORPTION	en
dc.subject.other	SAR	en
dc.subject.other	DIPOLE	en
dc.subject.other	PHONE	en
dc.subject.other	MHZ	en
dc.title	Theoretical approach of the interaction between a human head model and a mobile handset helical antenna using numerical methods	en
heal.type	journalArticle	en
heal.identifier.primary	10.2528/PIER06101901	en
heal.identifier.secondary	http://dx.doi.org/10.2528/PIER06101901	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	The interaction of a helical antenna, mounted on a mobile handset, with a human head phantom is investigated in this paper. Using the Genetic Algorithms (GA) technique combined with the Method of Moments (MoM), an optimization of the antenna structure is achieved regarding the input impedance at the operating frequency. The Finite Difference Time Domain (FDTD) method is then applied to simulate the handset's function in the close region of a spherical homogeneous and heterogeneous head phantom. A formula, based on an application of an existing model proposed by Kuster and Balzano for dipole antennas, provides a rather accurate prediction of the induced Specific Absorption Rate (SAR) values in the human head due to the radiating helical antenna. The concept of relating the SAR to the current on the antenna is used in this study to formulate the final expression. Moreover, using the theory of regression, the results of the calculated peak or average SAR are correlated with the distance between the antenna and phantom and with the standing wave ratio (SWR) at the antenna feed point. Thus, the conception that the SAR is indeed related to the antenna operational parameters is reinforced by the outcome of the current study.	en
heal.publisher	E M W PUBLISHING	en
heal.journalName	Progress in Electromagnetics Research	en
dc.identifier.doi	10.2528/PIER06101901	en
dc.identifier.isi	ISI:000243206600021	en
dc.identifier.volume	65	en
dc.identifier.spage	309	en
dc.identifier.epage	327	en