Measurement of wireless power transfer to multiple loads by a vector network analyser

A new scheme to use a constant current RF source (CCS) is proposed for the coupled-resonator wireless power transfer system. Considering it is hard to obtain a general-use CCS, an alternative use of common 50Ω signal source followed by Scattering to Impedance parameter transform is recommended with the theory of the transform, verification of the theory and some practical examples.