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Single-Contact Excitation and Power Extraction From Metallic Surface Using Synchronized Resonators
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DOI：10.1109/JESTIE.2026.3658343.png)
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Abstract
En 中文
This article presents a novel technique for energizing large metallic surfaces via single-contact excitation, enabling power extraction without a return conductor or ground connection. The system uses two one-end-open resonators at 1.4 MHz, separated by similar to 1.2 m, and driven by a GaN-based half H-bridge inverter generating a square wave. A theoretical model, based on power injection and absorption incorporating resonator synchronization and surface wave propagation at the dielectric-metal-dielectric boundary, is utilized to explain the power transfer mechanism. The system is validated through ANSYS HFSS simulations and measurement results and achieves similar to 55% DC-DC conversion efficiency with 70% efficiency in power converters. Experimental analysis explores the relationship between surface potential and load current, and voltage behavior across the source/load coils under varying load conditions. This scalable approach, which eliminates the need for a physical return path or complex wave-launching structures, establishes a new paradigm for flexible power delivery over metallic surfaces in industrial and automotive applications.
Keywords:
Resonators
Coils
Couplings
Resonant frequency
Surface waves
Voltage
Topology
Synchronization
Surface resistance
Surface impedance
Energization
extraction
GaN inverter
metallic surface (MS)
one-end-open resonator
power transfer
rectifier
self-resonating frequency (SRF)
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