| 摘要 |
PURPOSE:To set the antenna to an optimum receiving state, by providing a fixed antenna section and a movable antenna section having respectively a radiator and plural waveguides so as to exclude a ghost radio wave. CONSTITUTION:The fixed antenna section 3 is provided with the plural waveguides 6 and the radiator 7 fitted respectively to a bearing section 5 inserted into an antenna boom 2. Further, the radiator 7 is provided with a parabola reflector 9. Then, the waveguides 6 and the radiator 7 are kept on one horizontal plane. On the other hand, the movable antenna section 4 is provided with the plural waveguides 11 and the radiator 12 and fixed to a fitting section 13 of the antenna boom 2. Thus, the waveguides 11 and the radiator 12 are turnable according to the turning of the antenna boom 2. Thus, the ghost radio wave is excluded and the antenna is set to the optimum receiving state by adjusting an angle of the moving antenna section 4 to the fixed antenna section 3 in this way. |
