Abstract
Metamaterial-inspired resonator for a wireless power transfer system is proposed and studied numerically. The resonator consists of two orthogonal wire layers separated by a short distance. To reduce the resonant frequency from several hundreds of MHz it is placed in a background dielectric material with high permittivity. By tuning the permittivity of the background material, the radiation losses can be significantly reduced resulting in a high Q-factor of 900. The wireless power transfer efficiency greater than 80% from the wire resonator to a small loop receiver has been numerically demonstrated at the frequency of 19 MHz. The large area of the proposed resonator (50 cm × 50 cm) offers a possibility to charge multiple receivers simultaneously.
Highlights
Wireless power transfer (WPT) through magnetic resonance coupling is thought to be a popular and safe way for charging consumer electronic devices [1, 2]
The system utilizes a transmitter and receiver operating at the same resonant frequency which are coupled through the magnetic fields
We propose a metamaterials-inspired resonator which is composed of two orthogonal wire layers separated by a short distance placed in a background material with high permittivity
Summary
Wireless power transfer (WPT) through magnetic resonance coupling is thought to be a popular and safe way for charging consumer electronic devices [1, 2]. Metamaterial-inspired resonator for a wireless power transfer system is proposed and studied numerically. To reduce the resonant frequency from several hundreds of MHz it is placed in a background dielectric material with high permittivity. By tuning the permittivity of the background material, the radiation losses can be significantly reduced resulting in a high Q-factor of 900.
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