| 摘要 |
PURPOSE:To attain compactness at folding and to reduce the interference among reflection mirror surfaces at the expansion by adopting the constitution that split reflection mirror faces are folded around a central reflection mirror face and then expanded. CONSTITUTION:Each end of plural split reflection mirror faces 14, 15 provided radially to the circumferential ridge of the central reflection mirror face 11 around the mirror face 11 is supported by a synchronization release mechanism having tangential axes 12, 13 provided to the circumferential ridge of the mirror face 11 freely turnably in a direction. A couple of front matchiog mirror faces 14, 15 combined in a way that the front faces are opposed to each other in the folding state and another couple of rear face matching mirror faces 15, 15 combined in a way that the rear faces are opposed are arranged to the mirror faces 14, 15 overlappingly alternately, the mirror faces 14, 14 and 15, 15 are driven around the axis of the mirror face 11 in a tangential direction and the rear faces are driven around the axis of the antenna radially so that they face outward. The mirror faces are expanded while the interference among the mirror faces is prevented in this way.
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