| 摘要 |
<p>A multibeam antenna comprises a parabola reflector, a down converter, a supporting arm, and a holding member. The down converter comprises, in one unit, a multi-primary radiator, and a housing incorporating a conversion circuit. The multi-primary radiator comprises a plurality of primary radiators whose centers of apertures are aligned. Two adjacent primary radiators are joined at an integrating part. The angle between the down converter and the supporting arm can be changed relative to the vertical irradiation axis by the holding member, and hence the angle of polarization can be regulated easily by the changing function. Paired power supply elements provided on the conversion circuit are arranged perpendicularly to each other. The angle between each power supply element and the center line of the integrating part is determined based on the central longitude of the range of latitude of the receiving area.</p> |
