An implantable medical device comprising: a rechargeable power source coupled to one or more electrical circuits located within a housing of the implantable medical device, the rechargeable power source configured to provide electrical power to the one or more electrical circuits; a receive antenna configuration comprising at least one receive coil comprising an electrical conductor forming a coil winding, the coil winding affixed to a ferrite sheet positioned within an interior cavity enclosed by the housing of the implantable medical device, the coil winding and the ferrite sheet formed into a curved shape that conforms to a curvature of at least a portion of an inner surface of the housing that at least partially encloses the interior cavity, the ferrite sheet positioned between the coil winding and an external source of an externally generated magnetic field, wherein the ferrite sheet and the coil winding bend along and are positioned adjacent to the curvature of at least the portion of the inner surface, the receive coil configured to generate an electrical current induced into the at least one receive coil when the externally generated magnetic field passes through the ferrite sheet before being imposed onto the at least one receive coil; and recharging circuitry coupled to the at least one receive coil and to the rechargeable power source, the recharging circuitry configured to receive the electrical current induced into the at least one receive coil and to provide a recharging current to the rechargeable power source, wherein the at least one receive coil and the recharging circuitry are configured to provide at least a minimum level of recharging current for a given level of magnetic field intensity provided by the magnetic field imposed on the at least one receive coil for a plurality of orientations of the magnetic field direction relative to an orientation of the implantable medical device. a rechargeable power source coupled to one or more electrical circuits located within a housing of the implantable medical device, the rechargeable power source configured to provide electrical power to the one or more electrical circuits; a receive antenna configuration comprising at least one receive coil comprising an electrical conductor forming a coil winding, the coil winding affixed to a ferrite sheet positioned within an interior cavity enclosed by the housing of the implantable medical device, the coil winding and the ferrite sheet formed into a curved shape that conforms to a curvature of at least a portion of an inner surface of the housing that at least partially encloses the interior cavity, the ferrite sheet positioned between the coil winding and an external source of an externally generated magnetic field, wherein the ferrite sheet and the coil winding bend along and are positioned adjacent to the curvature of at least the portion of the inner surface, the receive coil configured to generate an electrical current induced into the at least one receive coil when the externally generated magnetic field passes through the ferrite sheet before being imposed onto the at least one receive coil; and recharging circuitry coupled to the at least one receive coil and to the rechargeable power source, the recharging circuitry configured to receive the electrical current induced into the at least one receive coil and to provide a recharging current to the rechargeable power source, wherein the at least one receive coil and the recharging circuitry are configured to provide at least a minimum level of recharging current for a given level of magnetic field intensity provided by the magnetic field imposed on the at least one receive coil for a plurality of orientations of the magnetic field direction relative to an orientation of the implantable medical device.