An arrangement is described for a partially implantable medical system. A communications coil is adapted for placement parallel to a corresponding partner coil for communication of an implant communications signal having an associated magnetic field component. An implant electronics module is adjacent to the communications coil and electrically connected with it for coupling of the communications signal. And a planar coil shield lens is between the communications coil and the electronics module to promote coupling of the communications signal between the coils and to shield the electronics module from interaction with the magnetic field component.
