Resonant, contactless radio frequency power coupling

  • US 8,212,414 B2
  • Filed: 05/29/2009
  • Issued: 07/03/2012
  • Est. Priority Date: 07/10/2008
  • Status: Active Grant
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First Claim
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1. A contactless RF power coupling system comprising:

  • a transmit coupling, wherein the transmit coupling includes a first canister that is electrically conductive and at least partially open at an end thereof, and a first resonant circuit having a first resonant frequency;

    a receive coupling, wherein the receive coupling includes a second canister that is electrically conductive and at least partially open at an end thereof, and a second resonant circuit having a second resonant frequency; and

    an RF source that provides the RF signal to the transmit couplings, the RF source comprising;

    a direct current power supply;

    a plurality of switches, wherein each of the plurality of switches comprises a first contact and a second contact, and wherein each of the plurality of first contacts and the power supply are electrically connected at a first node, and wherein each of the plurality of second contacts and the first resonant circuit are electrically connected at a second node; and

    a controller, wherein the controller controls the state of each of the plurality of switches;

    wherein the transmit coupling receives an RF signal having a first frequency and a second frequency that is a harmonic frequency of the first frequency, and wherein the transmit coupling passes each of the first frequency and second frequency to the receive coupling when the transmit coupling and receive coupling are inductively coupled.

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