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Journal Article
Design of Miniaturized and Bandwidth-Enhanced Implantable Antenna on Dielectric/Ferrite Substrate for Wireless Biotelemetry
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- Authors
- Jae-Ho LEE, Dong-Wook SEO
- Issue Date
- 2017-02
- Citation
- IEICE Transactions on Communications, v.E100.B, no.2, pp.227-233
- ISSN
- 0916-8516
- Publisher
- 일본, 전자정보통신학회 (IEICE)
- Language
- English
- Type
- Journal Article
- Abstract
- A miniaturized and bandwidth-enhanced implantable antenna is designed for wireless biotelemetry in the medical implantable communications service (MICS) frequency band of 402-405 MHz. To reduce the antenna size and enhance the available bandwidth with regard to the reflection coefficients, a meandered planar inverted-F antenna (PIFA) structure is adopted on a dielectric/ferrite substrate which is an artificial magneto-dielectric material. The potential of the proposed antenna for the intended applications is verified through prototype fabrication and measurement with a 2/3 human muscle phantom. Good agreement is observed between the simulation and measurement in terms of resonant characteristics and gain radiation patterns; the bandwidth is enhanced in comparison with that of the ferrite-removed antenna, and antenna gain of -27:7 dB is obtained in the measurement. Allowances are made for probable fabrication inaccuracies and practical operating environments. An analysis of 1-g SAR distribution is conducted to confirm compliance with the specific absorption rate limitation (1.6 W/kg) of the American National Standards Institute (ANSI).
- KSP Keywords
- Antenna gain, Available bandwidth, Ferrite substrate, Inverted F antenna(IFA), Magneto-dielectric material, National standard, Planar inverted F antenna, Rate limitation, Resonant characteristics, SAR distribution, Simulation and measurement