Patent ID: 8620447

Claim:
An implantable coil for use in a transcutaneous energy transfer system, comprising: a coil winding configured to inductively couple to a primary coil disposed external to a patient's body, the coil winding adapted to produce an electric current in the presence of a time-varying magnetic field operating at a first frequency; a ferrite core coupled to the coil winding, said ferrite core having a planar surface substantially parallel to the coil winding; circuitry contained in the ferrite core and in electrical communication with the coil winding, the circuitry adapted to receive and condition the electric current produced in the coil winding; and a radio frequency (RF) antenna configured to operate at a second frequency different from the first frequency, the RF antenna comprising a micro-strip patch antenna disposed on the planar surface of the ferrite core such that the micro-strip patch antenna is substantially parallel to a skin surface and is disposed between the skin surface and the ferrite core when the coil winding is implanted in the patient at a location just below the skin surface, wherein the ferrite core is configured to isolate said circuitry from the first and second frequencies.