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Related Experiment Video

Updated: May 7, 2026

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T
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Misalignment tolerable coil structure for biomedical applications with wireless power transfer.

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    Summary

    This study presents a novel orthogonal dual-coil receiver for wireless power transfer, significantly improving misalignment tolerance and efficiency for applications like retinal prostheses.

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    Area of Science:

    • Electrical Engineering
    • Biomedical Engineering
    • Electromagnetics

    Background:

    • Coil misalignment is a major challenge in inductive wireless power transfer, reducing efficiency.
    • This is particularly critical for implantable devices such as retinal prostheses.
    • Weak magnetic flux linkage under misalignment severely impacts power transfer.

    Purpose of the Study:

    • To introduce a novel receiver configuration with high tolerance to coil misalignment.
    • To reduce the variation in mutual inductance between transmitter and receiver coils.
    • To enhance power efficiency in wireless power transfer systems.

    Main Methods:

    • Proposed a receiver design using two orthogonally placed receiver coils.
    • Analyzed and compared three different receiver coil structures.
    • Utilized theoretical predictions and experimental measurements for validation.

    Main Results:

    • The orthogonal dual-coil configuration demonstrated significantly reduced mutual inductance variation under misalignment.
    • The novel receiver design showed improved misalignment tolerance compared to conventional designs.
    • Experimental results confirmed the theoretical predictions.

    Conclusions:

    • The proposed orthogonal dual-coil receiver effectively mitigates the negative impact of coil misalignment.
    • This configuration offers a promising solution for improving the reliability and efficiency of wireless power transfer in demanding applications.
    • Further research can explore optimized coil geometries and materials for enhanced performance.