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    This study introduces a T/Y-maze wireless power transmission (WPT) system for monitoring rat behavior. The innovative WPT system ensures uniform power delivery for uninterrupted neural recording and stimulation experiments.

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    Area of Science:

    • Neuroscience
    • Biomedical Engineering
    • Electrical Engineering

    Background:

    • Monitoring freely moving rats in T/Y mazes requires reliable power for neural recording and stimulation.
    • Existing systems face limitations in providing continuous, uninterrupted power delivery within maze environments.
    • Wireless power transmission (WPT) offers a potential solution for untethered experimental setups.

    Purpose of the Study:

    • To develop and optimize a T/Y-maze-based WPT system for behavioral monitoring in rats.
    • To achieve uniform wireless power delivery across the entire maze area.
    • To enable seamless integration with wireless headstages for uninterrupted neural experiments.

    Main Methods:

    • Designed and modeled a WPT system using ANSYS HFSS software, incorporating an array of transmitter (Tx) resonators.
    • Investigated different Tx array configurations (float, series, parallel) to optimize power delivery homogeneity.
    • Fabricated and tested a prototype T-maze WPT system, measuring power transfer efficiency and homogeneity.

    Main Results:

    • Achieved 94% homogeneity in power transfer efficiency with an overlapping Tx resonators configuration.
    • Demonstrated continuous power delivery exceeding 60 mW in the series configuration.
    • Calculated a Specific Absorption Rate (SAR) of 1.7 W/kg in a rat tissue model at 13.56 MHz.

    Conclusions:

    • The developed T/Y-maze WPT system effectively provides uniform wireless power for behavioral studies in rats.
    • The system supports uninterrupted neural recording and stimulation, enhancing experimental capabilities.
    • Optimized resonator configurations ensure efficient and scalable power delivery within complex maze environments.