Design and Optimization of a Mid-Field Wireless Power Transfer System for Enhanced Energy Transfer Efficiency

Mid-field wireless power transfer (WPT) offers a compelling solution for delivering power to miniature implantable medical devices deep within the human body. Despite its potential, the current power delivery levels remain constrained, and the design of a compact source structure to focus the transm...

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Bibliographic Details
Published in:Symmetry (Basel) 2024-06, Vol.16 (6), p.753
Main Authors: Khan, Daud, Ahmad, Ashfaq, Choi, Dong-you
Format: Article
Language:English
Subjects:
Antennas
Antennas (Electronics)
biomedical
Communications equipment
Current distribution
Design
Design optimization
Dielectric properties
Efficiency
Electric power
Electricity generation
Energy management systems
Energy transfer
Energy use
Human body
implantable
Implants, Artificial
Medical equipment
mid-field
miniaturized
Patient safety
Prosthesis
Receivers & amplifiers
Skin
Tissues
Transmitters
wireless power transfer (WPT)
Wireless power transmission
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Summary:Mid-field wireless power transfer (WPT) offers a compelling solution for delivering power to miniature implantable medical devices deep within the human body. Despite its potential, the current power delivery levels remain constrained, and the design of a compact source structure to focus the transmitter field on such implants presents significant challenges. In this paper, a novel miniaturized transmitter antenna operating at 1.71 GHz is proposed. Leveraging the antenna proximity-coupled feeding technique, we achieve optimal current distribution for efficient power transfer. Additionally, a receiver integrated within the human body is proposed, comprising a slotted ground and a meandering slotted radiating element. This receiver is excited via a coaxial feedline with a truncated ground. Our findings demonstrate wireless power transfer of −23 dB (0.501%) at a distance of 30 mm between the transmitter and receiver, alongside a peak gain of −20 dB with an impedance bandwidth of 39.61%. These results highlight promising advancements in enhancing energy transfer efficiency for deep-implant applications.
ISSN:2073-8994
2073-8994
DOI:10.3390/sym16060753