An air vehicle includes a fuselage, and one or more lifting surfaces attached to the fuselage. The SIM card seat is used for receiving a SIM card, which comprises a housing, a signal conducting terminal, a card holder and a ejector. The Switch module comprises a centering device which, under action of a force which is oriented coaxially with respect to the longitudinal axis of the steering spindle, fixes the switch module on the casing tube. Moreover, the two opposing electrode surfaces define an electrode curvature, respectively, that is adapted such that a wave front of the a fundamental transverse radiation mode with respect to the narrow axis substantially coincides with a mirror curvature of the first mirror at the first distance.