Journal
MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING
Volume 52, Issue 8, Pages 639-651Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11517-014-1169-3
Keywords
Wireless power transfer; Implantable device; Freely moving animals; Columnar dual transmitter; Resonator-based inductive link
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Funding
- Pioneer Research Center Program through the National Research Foundation of Korea - Ministry of Education, Science and Technology [NRF-2009-0082961]
- Public Welfare & Safety research program through the National Research Foundation of Korea - Ministry of Education, Science and Technology [NRF-2010-0020851]
- Technology Innovation Program of the Ministry of Knowledge Economy (MKE) [10033657]
- IC Design Education Center (IDEC), KAIST
- Korea Evaluation Institute of Industrial Technology (KEIT) [10033657] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2010-0020851, 2009-0082961] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Reliable wireless power delivery for implantable devices in animals is highly desired for safe and effective experimental use. Batteries require frequent replacement; wired connections are inconvenient and unsafe, and short-distance inductive coupling requires the attachment of an exterior transmitter to the animal's body. In this article, we propose a solution by which animals with implantable devices can move freely without attachments. Power is transmitted using coils attached to the animal's cage and is received by a receiver coil implanted in the animal. For a three-dimensionally uniform delivery of power, we designed a columnar dual-transmitter coil configuration. A resonator-based inductive link was adopted for efficient long-range power delivery, and we used a novel biocompatible liquid crystal polymer substrate as the implantable receiver device. Using this wireless power delivery system, we obtain an average power transfer efficiency of 15.2 % (minimum efficiency of 10 % and a standard deviation of 2.6) within a cage of 15 x 20 x 15 cm(3).
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