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Tissue Variability and Antennas for Power Transfer to Wireless Implantable Medical Devices

Bocan, Kara N. and Mickle, Marlin H. and Sejdic, Ervin (2017) Tissue Variability and Antennas for Power Transfer to Wireless Implantable Medical Devices. IEEE Journal of Translational Engineering in Health and Medicine, 5. pp. 1-11. ISSN 2168-2372

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The design of effective transcutaneous systems demands the consideration of inevitable variations in tissue characteristics, which vary across body areas, among individuals, and over time. The purpose of this paper was to design and evaluate several printed antenna topologies for ultrahigh frequency (UHF) transcutaneous power transfer to implantable medical devices, and to investigate the effects of variations in tissue properties on dipole and loop topologies. Here, we show that a loop antenna topology provides the greatest achievable gain with the smallest implanted antenna, while a dipole system provides higher impedance for conjugate matching and the ability to increase gain with a larger external antenna. In comparison to the dipole system, the loop system exhibits greater sensitivity to changes in tissue structure and properties in terms of power gain, but provides higher gain when the separation is on the order of the smaller antenna dimension. The dipole system was shown to provide higher gain than the loop system at greater implant depths for the same implanted antenna area, and was less sensitive to variations in tissue properties and structure in terms of power gain at all investigated implant depths. The results show the potential of easily-fabricated, low-cost printed antenna topologies for UHF transcutaneous power, and the importance of environmental considerations in choosing the antenna topology.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Bocan, Kara N.
Mickle, Marlin H.
Date: 9 August 2017
Date Type: Publication
Journal or Publication Title: IEEE Journal of Translational Engineering in Health and Medicine
Volume: 5
Publisher: IEEE
Page Range: pp. 1-11
DOI or Unique Handle: 10.1109/jtehm.2017.2723391
Schools and Programs: Swanson School of Engineering > Electrical and Computer Engineering
Refereed: Yes
ISSN: 2168-2372
Official URL:
Article Type: Research Article
Date Deposited: 13 May 2020 15:25
Last Modified: 13 May 2020 15:25


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