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Inductive coupling links for lowest misalignment effects in transcutaneous implanted devices.

Saad Mutashar Abbas, Mahammad A Hannan, Salina A Samad

    Biomedizinische Technik. Biomedical Engineering
    |January 22, 2014
    PubMed
    Summary
    This summary is machine-generated.

    Wireless powering of implanted devices using inductive links is improved by optimizing coil design. This study shows optimal coil layouts maintain consistent power transfer despite lateral misalignment and varying skin conditions.

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    Area of Science:

    • Biomedical Engineering
    • Wireless Power Transfer
    • Implantable Devices

    Background:

    • Transcutaneous inductive links are crucial for wireless powering of bio-implanted devices.
    • Current coil designs for inductive links often lack optimality, impacting device performance.
    • Small loop antenna theory offers a potential solution for improving coil design.

    Purpose of the Study:

    • To investigate the impact of lateral coil misalignments on inductive links for bio-implanted devices.
    • To reduce the effects of misalignment on human biological tissue models at 13.56 MHz.
    • To develop an optimal coil layout for robust wireless power transfer.

    Main Methods:

    • Utilized small loop antenna theory for inductive link design.
    • Modeled a biological human tissue model (60 mm×70 mm×5 mm) separating reader and implanted coils.
    • Investigated aligned and laterally misaligned coils (x-distance) under varying skin conditions (wet/dry).
    • Developed optimal coil layout based on established layout rules.

    Main Results:

    • The gain around the coils remained constant despite lateral misalignments (<4 mm or >6 mm up to 8 mm).
    • An omnidirectional radiation pattern was confirmed, indicating consistent power transfer.
    • Coil misalignments and skin conditions did not negatively affect the coil's efficient performance.

    Conclusions:

    • Optimal coil design based on small loop antenna theory significantly mitigates performance degradation due to lateral misalignment.
    • The developed coil layout ensures reliable wireless power transfer for bio-implanted devices across various misalignment scenarios and skin conditions.
    • This research contributes to more robust and efficient wireless powering solutions for implantable microsystems.