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Distributed battery-free bioelectronic implants with improved network power transfer efficiency via magnetoelectrics.

Joshua E Woods1, Fatima Alrashdan1, Ellie C Chen1

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Summary

Magnetoelectric wireless technology enables efficient power and data transfer for networks of miniature bioelectronic implants. System efficiency improves with more devices, supporting advanced electronic medicine applications.

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Neuroscience

Background:

  • Networks of miniature implants offer potential for advanced medical applications like prosthetics and disease monitoring.
  • Current wireless power and data transfer methods face inefficiencies through biological tissues, limiting network scalability.

Purpose of the Study:

  • To develop and demonstrate a scalable wireless power and data transfer system for networks of miniature bioelectronic implants.
  • To improve the efficiency and robustness of wireless communication for implantable devices.

Main Methods:

  • Utilized magnetoelectric wireless technology for power and data transfer.
  • Demonstrated networks of 1 to 6 millimetre-sized bioelectronic implants.
  • Tested proof-of-concept networks in large animals for spinal cord stimulation and cardiac pacing.

Main Results:

  • Achieved a system efficiency increase from 0.2% to 1.3% with an increasing number of implants.
  • Each implant node received 2.2 mW of power at a 1 cm distance.
  • Demonstrated successful wireless, battery-free operation of implant networks.

Conclusions:

  • Magnetoelectric wireless transfer provides a scalable architecture for bioelectronic implant networks.
  • This technology enhances system efficiency with increased device numbers, overcoming previous limitations.
  • Enables next-generation electronic medicine through robust and efficient wireless power and data transfer for implantable devices.