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Used as the transmitting and receiving elements, coils are the most popular elements for wireless power transfer. The parasitic coil or LC booster coil has been used as the part of the receiving element and reported to be effective to increase the wireless Power transfer efficiency so far. In this paper, the maximum transfer efficiency of the wireless power system by using parasitic coil will be calculated...
Numerical analysis of the near-field power transfer using multi-antennas is performed based on the scattering parameters for an equivalent circuit model of multi-port networks. The transfer power efficiency is derived by using the multi-port scattering parameters. Since the multi-port scattering parameters are easily measured by a vector network analyzer and calculated by a full-wave numerical analysis,...
Based on the transmitting efficiency of WPT system calculated by using s-parameters when the WPT system is equivalent to a 2-ports lossy network [1], the effects of human body on the transmitting efficiency of WPT system with three different transmitting/receiving elements are further investigated in this paper. It is found that the WPT system using the element consisting of loop and a parasitic helical,...
The maximum transfer efficiency of WPT system with resonant transmitting/receiving elements and non-resonant transmitting/receiving elements has been analyzed and compared in this paper. It has been observed that the resonant characteristic of transmitting/receiving elements gives little impact on the maximum transfer efficiency when the receiving element is close to the transmitting element, but...
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