International Symposium on Antennas and Propagation
Numerical Analysis on Efficient Evanescent Resonant Coupling Wireless Power transmission System
Q. Yuan, Q. Chen, L. Li, K. Sawaya,
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In this paper, like antenna transmitting and receiving system in radiation mode, the power transmission efficiency is directly defined as the ratio of the receiving power at the receiving element and the input power at the source element and calculated by the full wave solver. A more practical wireless transmission system consisting of a larger rectangular wire loop and a small square wire loop with a parasitic square helical coil is proposed. The larger rectangular wire loop is used as the source element which can be built-in the office room wall, while the small rectangular wire loop with a parasitic helical coil is used as receiving element which can be built-in a mobile personal computer. The MoM is selected as the full wave solver in our analysis. Along with the transmission efficiency, the input impedance of transmitting element and receiving element are also investigated to seek a technique to tune the resonance frequency, further to obtain the optimum transmission efficiency. The effects of the relative position of the receiving element and source element, the number more than one receiving element and the non-resonant object such as human body will also be investigated in this paper.