Patent ID: 8084889

Claim:
A system for wirelessly providing power to a load, the system comprising: a first electromagnetic resonator configured to be coupled to a power supply, the first resonator having a characteristic size L 1 , a resonant frequency ω 1 , an intrinsic loss rate Γ 1 , and a first Q-factor Q 1 =ω 1 /(2Γ 1 ); a second electromagnetic resonator configured to be coupled to the load, the second resonator having a characteristic size L 2 , a resonant frequency ω 2 , an intrinsic loss rate Γ 2 , and a second Q-factor Q 2 =ω 2 /(2Γ 2 ), wherein the first and second resonators are configured to be wirelessly coupled to provide resonant non-radiative wireless power to the second resonator from the first resonator with a wireless energy transfer rate κ, and wherein the resonators satisfy κ/√{square root over (Γ 1 Γ 2 )}>1 for at least some distances D between the first and second resonators satisfying D/L 2 >1.