| 摘要 |
PROBLEM TO BE SOLVED: To receive electric waves from the other geostationary satellite by a multi-beams parabolic antenna dedicated to electric waves reception from a specific geostationary satellite. SOLUTION: An arcuate slot 28 positioned on a circumference around a focus is formed on a base plate 26 disposed so as to superimpose the focus on a back surface side of a reflection mirror, screw holes 24 are formed on the circumference on the back surface of the reflection mirror, and a bolt 30 is connected to the screw hole 24 via the slot 28. The slot 28 is formed in a range that a reflection mirror 8 can be rotated until a position where two primary radiators on both sides of a focus position rotated around the focus ranging over a predetermined angular range from a substantially horizontal state to a predetermined rotational direction. A through hole 102 is formed in a rotation plate 100 between the reflection mirror 8 and the base plate 26, to insert a bolt 104 for mounting the rotation plate 100 in the screw hole 24. In a state that the rotation plate 100 is mounted on the back surface of the reflection mirror, a screw hole 106 is formed at a position on the circumference of the rotation plate 100, and the bolt 30 inserted into the slot 28 is connected thereto. The screw hole 106 is formed at a position where the reflection mirror can rotate in a direction reverse to a predetermined rotational direction along the slot 28.
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