This study proposes a novel brain-stimulated mouse experiment system which is insensitive to the variations in the position and orientation of a mouse. This is achieved by the proposed novel crown-type dual coil system for magnetically coupled resonant wireless power transfer (MCR-WPT). In the detailed system architecture, the transmitter coil consists of a crown-type outer coil and a solenoid-type inner coil. The crown-type coil was constructed by repeating the rising and falling at an angle of 15° for each side which creates the H-field diverse direction. The solenoid-type inner coil creates a magnetic field distributed uniformly along the location. Therefore, despite using two coils for the Tx system, the system generates the H-field insensitive to the variations in the position and angle of the receiver system. The receiver is comprised of the receiving coil, rectifier, divider, LED indicator, and the MMIC that generates the microwave signal for stimulating the brain of the mouse. The system resonating at 2.84 MHz was simplified to easy fabrication by constructing 2 transmitter coils and 1 receiver coil. A peak PTE of 19.6% and a PDL of 1.93 W were achieved, and the system also achieved an operation time ratio of 89.55% in vivo experiments. As a result, it is confirmed that experiments could proceed for approximately 7 times longer through the proposed system compared to the conventional dual coil system.
|Number of pages
|IEEE Transactions on Biomedical Circuits and Systems
|Published - 1 Apr 2023
Bibliographical noteFunding Information:
This work was supported in part by the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT under Grants NRF-2018M3C7A1024736, NRF-2022M3E5E8018421, and NRF-2022R1A2C2009265, and in part by the Creative-Pioneering Researchers Program through Seoul National University (SNU).
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- biomedical applications
- brain stimulation system
- magnetic coupling resonance
- near-field coupling
- Wireless power transfer