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Numerical assessment of the performance of a scalp-implantable antenna: Effects of head anatomy and dielectric parameters

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dc.contributor.author Kiourti, A en
dc.contributor.author Nikita, KS en
dc.date.accessioned 2014-03-01T11:47:06Z
dc.date.available 2014-03-01T11:47:06Z
dc.date.issued 2012 en
dc.identifier.issn 01978462 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/38084
dc.subject Finite-difference time-domain (FDTD) en
dc.subject Implantable antenna en
dc.subject Medical Implant Communications Service (MICS) band en
dc.subject Medical telemetry en
dc.subject Specific absorption rate (SAR) en
dc.title Numerical assessment of the performance of a scalp-implantable antenna: Effects of head anatomy and dielectric parameters en
heal.type other en
heal.identifier.primary 10.1002/bem.21753 en
heal.identifier.secondary http://dx.doi.org/10.1002/bem.21753 en
heal.publicationDate 2012 en
heal.abstract We numerically assess the effects of head properties (anatomy and dielectric parameters) on the performance of a scalp-implantable antenna for telemetry in the Medical Implant Communications Service band (402.0-405.0MHz). Safety issues and performance (resonance, radiation) are analyzed for an experimentally validated implantable antenna (volume of 203.6mm3), considering five head models (3- and 5-layer spherical, 6-, 10-, and 13-tissue anatomical) and seven scenarios (variations±20% in the reference permittivity and conductivity values). Simulations are carried out at 403.5MHz using the finite-difference time-domain method. Anatomy of the head model around the implantation site is found to mainly affect antenna performance, whereas overall tissue anatomy and dielectric parameters are less significant. Compared to the reference dielectric parameter scenario within the 3-layer spherical head, maximum variations of -19.9%, +3.7%, -55.1%, and -39.2% are computed in the maximum allowable net input power imposed by the IEEE Std C95.1-1999 and Std C95.1-2005 safety guidelines, return loss, and maximum far-field gain, respectively. Compliance with the recent IEEE Std C95.1-2005 is found to be almost insensitive to head properties, in contrast with IEEE Std C95.1-1999. Taking tissue property uncertainties into account is highlighted as crucial for implantable antenna design and performance assessment. Bioelectromagnetics. © 2012 Wiley Periodicals, Inc. en
heal.journalName Bioelectromagnetics en
dc.identifier.doi 10.1002/bem.21753 en


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