Patent ID: 8400023

Claim:
A system, comprising: a source resonant structure and a device resonant structure, the structures capable of performing wireless near-field energy transfer with a coupling rate κ when separated a variable distance D from each other, said source resonant structure having a resonant frequency f 1 =ω 1 /2π, an intrinsic loss rate Γ 1 , and a first Q-factor Q 1 =ω 1 /(2Γ 1 ), where ω 1 is the angular frequency corresponding to the resonant frequency f 1 , said device resonant structure having a resonant frequency f 2 =ω 2 /2π, an intrinsic loss rate Γ 2 , and a second Q-factor Q 2 =ω2/(2Γ 2 ), where ω 2 is the angular frequency corresponding to the resonant frequency f 2 , wherein the absolute value of the difference of said angular frequencies ω 1 and ω 2 is smaller than the magnitude of the coupling rate, κ, and wherein at least one of the resonant structures comprises a high-Q capacitively-loaded conducting-wire loop.