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A Resonant Coupler for Subcutaneous Implant.

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  • 1Electrical and Computer Engineering, Southern Methodist University, Dallas, TX 75205, USA.

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A new resonator coupler design enhances wireless power transfer for subcutaneous implants by improving resonance and reducing signal reflection. This technology enables efficient, noninvasive localization of implanted devices.

Keywords:
implantimplant localizationresonatorsubcutaneoustuningwireless power transfer

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Area of Science:

  • Biomedical Engineering
  • Electrical Engineering
  • Implantable Devices

Background:

  • Subcutaneous implants require efficient wireless power transfer and reliable communication.
  • Conventional loop antennas face challenges with impedance matching and resonance in biological tissues.

Purpose of the Study:

  • To develop an improved resonator coupler for subcutaneous implants.
  • To enhance wireless power transfer efficiency and enable noninvasive implant localization.

Main Methods:

  • Introduced a novel impedance matching pattern with a concentric metal pad to a loop antenna.
  • Designed and simulated two prototypes for ISM bands (903 MHz and 2.45 GHz).
  • Investigated effects of tissue depth variations and validated designs using pork phantoms and human skin dielectric properties.

Main Results:

  • The new design significantly improved resonance and quality factor, lowering the reflection coefficient.
  • Achieved efficient noninvasive localization of subcutaneous implants.
  • Validated the design method for human skin applications.

Conclusions:

  • The developed planar resonant coupler demonstrates promising performance for wireless power transfer in subcutaneous implant applications.
  • The integrated tuning elements facilitate high-quality factor resonance for accurate implant localization.