An injection device of the kind having a main housing is disclosed and includes a drive mechanism to expel selectively a dose of medicament from a medicament cartridge through a needle unit and an electronic control unit to control the drive mechanism. The connection device includes a dielectric housing having a slot formed therein to allow the electrical device to plug in. The sensor includes the microsphere coupled with at least one optical fiber. The method also includes the step of identifying a portion of a television signal in which control information is present. A resonator grid includes a plurality of resonators in a planar array to electromagnetically enhance the performance of the plan antenna section.