US Patent 9533163 Systems and methods for implantable medical device communication

An implantable medical device (IMD) is configured to be implanted within a patient. The IMD may include a controller configured to adjust a communication frequency, a housing formed of an electrically common material, and an insulating cover coupled to the housing. The insulating cover may include one or both of at least one opening or at least one thinned area over portions of the housing. Multiple sub-electrodes are formed in the housing through the opening(s) or the thinned area(s).