Patent ID: 9225203
Filing Date: 2015-12-29
Classification: H01Q,H02J

Abstract:
1. A method for acquiring an efficiency of power transfer in a wireless power transfer system, wherein the wireless power transfer system includes a first antenna; and a second antenna which is located from the first antenna at an arbitrary distance and arranged in an arbitrary direction in comparison with the first antenna, and wherein respective spherical modes of the first antenna and the second antenna are allowed to have orders which are same as or larger than a predetermined value which is an integer greater than 1 to thereby transfer wireless power between the first antenna and the second antenna, comprising the steps of: (a) acquiring scattering matrixes of the first antenna and the second antenna; (b) acquiring a mode coefficients conversion matrix between the coordinate of the first antenna and that of the second antenna, (c) acquiring Z-parameter or Y-parameter, reflecting mutual coupling effect between the first antenna and the second antenna, by referring to the acquired scattering matrixes and mode coefficients conversion matrix; and (d) acquiring the maximum efficiency of power transfer between the first antenna and the second antenna by referring to the acquired Z-parameter or the Y-parameter.