Patent ID: 6774860
Filing Date: 2004-08-10
Classification: H01Q

Abstract:
An antenna system for an unmanned air vehicle (UAV), comprising:a dipole antenna; an antenna mount rotatable about roll and pitch axes of the UAV; a first servo motor coupled to control rotation of the antenna mount about the roll axis; a second servo motor coupled to control rotation of the antenna mount about the pitch axis; a first feedback control system connected to the first servo motor to control rotation of the antenna mount about the roll axis in accordance with a roll error signal obtained from a gyro system in the UAV; and a second feedback control system connected to the second servo motor to control rotation of the antenna mount about the pitch axis in accordance with a pitch error signal obtained from a gyro system in UAV; wherein the antenna mount is rotated to compensate for pitch and roll rotations of the UAV, thereby reducing fluctuations in antenna gain that would otherwise be caused by misalignment of a radiation pattern of the antenna with a related ground-based antenna.