Patent ID: 7477203

Claim:
An elevation angle control apparatus for adjusting an elevation angle of a satellite antenna 10 by adjusting an angle of a frame 20 , pivotally fixed to a supporting bracket 30 by an elevation angle shaft 40 , to which the satellite antenna 10 is fixed, the elevation angle control apparatus comprising: a belt 50 in which one end 52 is fixed to the supporting bracket 30 and the other end thereof 54 is fixed to an upper end 22 of the frame 20 ; a driving motor 60 mounted on the supporting bracket 30 and driving the belt 50 ; a fixed pulley 70 rotatably fixed to the supporting bracket 30 between the driving motor 60 and the one end 52 of the belt 50 fixed to the supporting bracket 30 ; a movable pulley 80 disposed between the fixed pulley 70 and the one end 52 of the belt 50 fixed to the supporting bracket 30 ; and a rod 90 in which the movable pulley 80 is rotatably fixed to one end 92 of the rod and the other end 94 thereof is pivotally fixed between the elevation angle shaft 40 and the upper end 22 of the frame 20 ; wherein the belt 50 is connected from the upper end 22 of the frame 20 to the supporting bracket 30 via the driving motor 60 , the fixed pulley 70 and the movable pulley 80 , and the angle of the frame 20 is adjusted such that the frame 20 is rotated about the elevation angle shaft 40 by pulling of the belt 50 caused by forward and backward rotation of the driving motor 60 and by movement of the rod 90 caused by the pulling of the belt 50 .