This paper describes a pointing control of a mobile antenna mounted on a vehicle. For precise pointing, the antenna must be controlled to point to a target under the influence of continuous disturbances acting on the vehicle. For this purpose, we propose an optimal controller design method in a framework of the H_∞ gain-scheduled controller synthesis. By this synthesis, the optimal controller is obtained by using parameter varying notch-filter in order to attenuate the various frequency disturbances. We apply this design method to an automobile model having a rotating antenna.