Wireless power transfer efficiency between arbitrary transmitter and receiver by using S-parameters

The method to obtain the transfer efficiency between a transmitter and a receiver by using S-parameters was proposed by the authors in 2008. In this talk, firstly, the basic principle of our method will be briefly reviewed; then, the efficiencies of several different transmitter and receiver combination system will be demonstrated by using our efficiency calculator. To obtain the efficiency, our calculation method requires S-parameters which can be measured by using network analyzer or simulated by using full-wave electromagnetic simulation soft. Different to the other efficiency calculation methods such as using the equivalent circuit method, our approach has no approximations and assumptions, can be applied to any pair of transmitter and receiver no matter what structures they are, how far they separate and whatever the coupling methods are used.