Resonant Wireless Power Transfer: Investigation of radiating resonances

Resonant Wireless Power Transfer is an emerging technique for exchanging energy in the near field. Common resonators take the form of splitted ring resonators, coils, spiral, or helical resonators. The radiating behaviors of coupled resonators are investigated in this paper and properties important for practical applications are illustrated. We show that the selection of the appropriate resonant frequency is important in order to obtain full power transmission and to avoid unwanted electromagnetic interference.