Transmission efficiency improvement using shielded loop antenna for coupled-resonant wireless power transfer

摘要

Impedance matching mechanism of shielded loop antenna for coupled-resonant wireless power transfer is discussed. It is known that transmission efficiency of the shielded loop antenna is improved as compared with the loop antenna. In this report, we investigate the mechanism of transmission efficiency improvement in shielded loop antenna through equivalent circuit analysis. As a result, impedance matching is achieved due to the capacitance between the inner conductor and the outer conductor to improve transmission efficiency.