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Published on: August 27, 2021
Miniaturization of implantable wireless power receiver
1Electrical Engineering, Stanford University, USA. adapoon@stanford.edu
Summary
Wireless power for medical implants can be achieved efficiently at higher frequencies, enabling smaller, mm-sized devices. This overcomes limitations of current low-frequency systems, paving the way for advanced autonomous implants.
Area of Science:
- Biomedical Engineering
- Electrical Engineering
- Medical Device Technology
Background:
- Implantable medical devices are crucial in modern healthcare.
- Current devices face challenges like wire breakage and battery issues.
- Existing wireless power transfer methods for implants are limited by low frequencies and large antenna sizes.
Purpose of the Study:
- To investigate higher operating frequencies for wireless power transfer to medical implants.
- To demonstrate miniaturization of power receiving coils for autonomous implants.
- To enable enhanced functionalities in micro-implants through efficient power delivery.
Main Methods:
- Theoretical analysis and simulation of wireless power transfer at optimal frequencies.
- Design and evaluation of miniaturized power receiving coils.
- Assessment of power transfer efficiency and range under safety constraints.
Main Results:
- Optimal operating frequency identified as two orders of magnitude higher than conventional.
- Power receiving coils reduced by over 100-fold without compromising efficiency or range.
- Achieved micro-watt power transfer to mm-sized implants within safety limits.
Conclusions:
- Higher frequency operation is key to miniaturizing wireless power systems for implants.
- This advancement facilitates the development of smaller, more capable autonomous medical implants.
- Enables new clinical applications for micro-implants requiring efficient wireless energy.
