Magnetodielectric hexaferrite flake/polymer substrate for implantable antenna with an enhanced insensitivity to implant position

Sang Eui Lee; Han Joon Kim; Jae Ho Lee; Kyoung Sub Oh; H. Thomas Hahn; Ji Woong Choi

doi:10.1016/j.matlet.2016.08.100

Magnetodielectric hexaferrite flake/polymer substrate for implantable antenna with an enhanced insensitivity to implant position

Sang Eui Lee
, Han Joon Kim
, Jae Ho Lee
, Kyoung Sub Oh
, H. Thomas Hahn
, Ji Woong Choi

Department of Electrical Engineering and Computer Science

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

A magnetodielectric substrate is firstly proposed for implantable antennas in medical implant communication service (MICS) band. Ba₃Co₂Fe₂₄O₄₁ (Co₂Z), Z-type hexaferrite flakes synthesized by molten-salt method were incorporated with a polymer matrix, having a real permeability of 2.88 and a magnetic loss of 0.029 at 402 MHz. A spiral antenna with the magnetodielectric substrate has a bandwidth 70% and 50% broader than that with a commercial dielectric substrate, Rogers 3210, in a 2/3-phantom model and a multi-layered body model, respectively. The band broadening retains the bandwidth to be overlapped after implant positions change, leading to an enhancement in insensitivity to the implant position.

Original language	English
Pages (from-to)	94-97
Number of pages	4
Journal	Materials Letters
Volume	187
DOIs	https://doi.org/10.1016/j.matlet.2016.08.100
State	Published - 15 Jan 2017

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

Antenna substrate
Hexaferrite
Implantable medical antenna
MICS band
Magnetodielectric

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10.1016/j.matlet.2016.08.100

Cite this

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title = "Magnetodielectric hexaferrite flake/polymer substrate for implantable antenna with an enhanced insensitivity to implant position",

abstract = "A magnetodielectric substrate is firstly proposed for implantable antennas in medical implant communication service (MICS) band. Ba3Co2Fe24O41 (Co2Z), Z-type hexaferrite flakes synthesized by molten-salt method were incorporated with a polymer matrix, having a real permeability of 2.88 and a magnetic loss of 0.029 at 402 MHz. A spiral antenna with the magnetodielectric substrate has a bandwidth 70\% and 50\% broader than that with a commercial dielectric substrate, Rogers 3210, in a 2/3-phantom model and a multi-layered body model, respectively. The band broadening retains the bandwidth to be overlapped after implant positions change, leading to an enhancement in insensitivity to the implant position.",

keywords = "Antenna substrate, Hexaferrite, Implantable medical antenna, MICS band, Magnetodielectric",

author = "Lee, \{Sang Eui\} and Kim, \{Han Joon\} and Lee, \{Jae Ho\} and Oh, \{Kyoung Sub\} and Hahn, \{H. Thomas\} and Choi, \{Ji Woong\}",

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year = "2017",

month = jan,

day = "15",

doi = "10.1016/j.matlet.2016.08.100",

language = "English",

volume = "187",

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TY - JOUR

T1 - Magnetodielectric hexaferrite flake/polymer substrate for implantable antenna with an enhanced insensitivity to implant position

AU - Lee, Sang Eui

AU - Kim, Han Joon

AU - Lee, Jae Ho

AU - Oh, Kyoung Sub

AU - Hahn, H. Thomas

AU - Choi, Ji Woong

PY - 2017/1/15

Y1 - 2017/1/15

N2 - A magnetodielectric substrate is firstly proposed for implantable antennas in medical implant communication service (MICS) band. Ba3Co2Fe24O41 (Co2Z), Z-type hexaferrite flakes synthesized by molten-salt method were incorporated with a polymer matrix, having a real permeability of 2.88 and a magnetic loss of 0.029 at 402 MHz. A spiral antenna with the magnetodielectric substrate has a bandwidth 70% and 50% broader than that with a commercial dielectric substrate, Rogers 3210, in a 2/3-phantom model and a multi-layered body model, respectively. The band broadening retains the bandwidth to be overlapped after implant positions change, leading to an enhancement in insensitivity to the implant position.

AB - A magnetodielectric substrate is firstly proposed for implantable antennas in medical implant communication service (MICS) band. Ba3Co2Fe24O41 (Co2Z), Z-type hexaferrite flakes synthesized by molten-salt method were incorporated with a polymer matrix, having a real permeability of 2.88 and a magnetic loss of 0.029 at 402 MHz. A spiral antenna with the magnetodielectric substrate has a bandwidth 70% and 50% broader than that with a commercial dielectric substrate, Rogers 3210, in a 2/3-phantom model and a multi-layered body model, respectively. The band broadening retains the bandwidth to be overlapped after implant positions change, leading to an enhancement in insensitivity to the implant position.

KW - Antenna substrate

KW - Hexaferrite

KW - Implantable medical antenna

KW - MICS band

KW - Magnetodielectric

UR - https://www.scopus.com/pages/publications/84993984961

U2 - 10.1016/j.matlet.2016.08.100

DO - 10.1016/j.matlet.2016.08.100

M3 - Article

AN - SCOPUS:84993984961

SN - 0167-577X

VL - 187

SP - 94

EP - 97

JO - Materials Letters

JF - Materials Letters

ER -

Magnetodielectric hexaferrite flake/polymer substrate for implantable antenna with an enhanced insensitivity to implant position

Abstract

Bibliographical note

Keywords

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