| 摘要 |
PURPOSE:To set easily an elevating angle and an azimuth angle on ground in the direction of a satellite in a short time by forming a shape of an aperture of a reflector so as to provide wide and narrow directivity to both horizontal and vertical faces and providing a direction adjustment device matching earlier the wide directivity. CONSTITUTION:The antenna consist of a reflector 4, a primary radiator 5, a fixed device 6 and an elevating angle detecting meter 7 and the reflector 4 is formed to a shape having a long width and a short depth. When the area of aperture is unchanged, the gain is kept nearly identical, the beam width of the vertical directivity is wider and the beam width of the horizontal directivity is narrower. First the reflector 4 is adjusted so as to allow the elevating angle of the detecting meter 7 to be directed in the designated direction, then the parabolic antenna is directed in the azimuth toward the satellite by using an azimuth magnetic pointer and the azimuth is adjusted so as to maximize a reception output. since the beam of the vertical directivity is wide, when the azimuth is adjusted by moving the horizontal plane to the right and left, the disabled reception of a radio wave from the satellite is avoided and it is easy to apply minute adjustment of the elevating angle and azimuth after the radio wave is caught once. |
