Characterization of wireless power transfer system in environment using equivalent currents

Antennas used in near field wireless power transfer are approximated by canonical minimum scattering antennas. The self- and mutual-impedance can be calculated using the induced EMF method. When the self- and mutual-impedance between two canonical minimum scattering antennas in an environment are calculated using the induced EMF method, current distribution of an original antenna can be replaced by the equivalent currents that generate the same field as the field of the original antenna in transmitting mode.