An antenna unit includes one or more antenna circuits coupled to one or more antenna structures. The pad includes an inner surface and an outer surface, with the inner surface for facing the area of the wearer’s body. Once the wordline is selected, the charge stored on the local capacitance may be quickly shared with the capacitance of the wordline. A calibration circuit correlates measured electrode voltage to power line voltage. The content delivery system utilizes the initial scheduling information as a starting point for scheduling email deliveries.