Abstract In this paper, power transfer efficiency of Wireless Power Transfer (WPT) system is analyzed by using S-parameters with treating the WPT system as a 2-port lossy network. The optimum load impedance is determined by the conjugated matching conditions for the maximum power transfer efficiency of WPT system. It is found that this method has great universality and practicability to deal with power efficiency problems for WPT systems using different antennas as the S-parameter can be easily acquired from the numerical full-wave electromagnetic simulation software.
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Abstract In this paper, power transfer efficiency of Wireless Power Transfer (WPT) system is analyzed by using S-parameters with treating the WPT system as a 2-port lossy network. The optimum load impedance is determined by the conjugated matching conditions for the maximum power transfer efficiency of WPT system. It is found that this method has great universality and practicability to deal with power efficiency problems for WPT systems using different antennas as the S-parameter can be easily acquired from the numerical full-wave electromagnetic simulation software.