Wireless Energy Transfer Using Coupled Antennas

  • US 20090015075A1
  • Filed: 07/09/2007
  • Published: 01/15/2009
  • Est. Priority Date: 07/09/2007
  • Status: Active Grant
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First Claim
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1. A method of transmitting power wirelessly, comprising:

  • driving a series resonant antenna at a value near its resonant frequency to produce a magnetic field output, said non radiative antenna formed of a combination of resonant parts, including at least an inductive part formed by a wire loop, and a capacitor part that is separate from a material forming the inductive part; and

    maintaining at least one characteristic of said antenna such that its usable range has a minimum usable distance over which power can be received, which minimum distance is set by a detuning effect when a receiver gets too close to said antenna.

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