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Universal Analysis Method for Metamaterial-Based Wireless Power Transfer with Arbitrary Energy Source Waveforms:
Liangquan Xu1,2, Jiaqi Lu1,2, Jianhui Wu1,2
1College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
ACS Applied Materials & Interfaces
|January 31, 2025
Summary
A new time-domain analysis method enables efficient wireless power transfer (WPT) using metamaterials for complex energy sources. This approach significantly boosts energy transfer, showing potential for self-powered devices and medical implants.
Area of Science:
- Electromagnetics and Metamaterials
- Wireless Power Transfer (WPT)
- Signal Processing
Background:
- Metamaterial-based wireless power transfer (MM-WPT) holds significant application potential.
- Traditional frequency-domain analysis methods are limited to specific signal types (periodic, fixed-frequency) and unsuitable for arbitrary waveforms.
- This limitation hinders the analysis of MM-WPT systems powered by diverse energy sources.
Purpose of the Study:
- To develop an innovative time-domain system analysis method for MM-WPT systems.
- To enable the evaluation of MM-WPT systems with arbitrary waveforms from various energy sources.
- To demonstrate the efficiency and applicability of MM-WPT for self-powered systems and implants.
Main Methods:
- Development of a time-domain analysis framework for MM-WPT systems.
- Utilizing the unit impulse response as the core analytical tool.
- Convolution of the impulse response with arbitrary excitation source waveforms to obtain temporal voltage responses.
Main Results:
- The time-domain method shows high correlation and agreement between theoretical predictions and experimental results across various input waveforms.
- Triboelectric nanogenerators (TENGs) demonstrate efficient self-powered wireless energy transfer through MM-WPT systems.
- Energy received in MM-WPT systems is up to 59.6 times higher than conventional WPT systems.
- An MM-WPT system applied in an implant achieved a 51% energy transfer efficiency through biological tissues.
Conclusions:
- The proposed time-domain analysis method is valid, precise, and universally applicable for MM-WPT systems with arbitrary waveforms.
- MM-WPT systems, particularly when powered by TENGs, offer substantial improvements in energy transfer efficiency.
- These advancements pave the way for optimizing compact and efficient self-powered wireless energy applications, including biomedical implants.
Keywords:
implantmetamaterialtime-domain analysistriboelectric nanogeneratorwireless power transmissionMore Related Videos
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