Patent ID: 8400024

Claim:
A method of transferring electromagnetic energy comprising: providing a first electromagnetic resonator receiving energy from a power supply, said first electromagnetic resonator having a resonant frequency ω 1 , an intrinsic loss rate Γ 1 , an inductance L 1 , an ohmic component of resistance R 1ohm , a radiative component of resistance R 1rad , and a first Q-factor Q 1 =ω 1 L 1 /(R 1ohm +R 1rad ), and generating a near field region comprising a temporally oscillating magnetic field; providing a second electromagnetic resonator being positioned at variable distances from said first electromagnetic resonator and not electrically wired to said first electromagnetic resonator, said second electromagnetic resonator having a resonant frequency ω 2 , an intrinsic loss rate Γ 2 , an inductance L 2 , an ohmic component of resistance R 2ohm , a radiative component of resistance R 2rad , and a second Q-factor Q 2 =ω 2 L 2 /(R 2ohm +R 2rad ); and wirelessly transferring electromagnetic energy from said first electromagnetic resonator to said second electromagnetic resonator over a variable distance D as the second electromagnetic resonator moves freely within the near-field region, and wherein R 1ohm >R 1rad , and R 2ohm >R 2rad and at least one of Q 1 and Q 2 is greater than 100.