| 摘要 |
PURPOSE:To facilitate a conveyance and an assembling, to prevent the occurring of a clearance and a projected part at a main mirror surface after the development and to develop smoothly a divided piece by forming in a calyx-shaped piece the central part of the main mirror surface of a large antenna, dividing alternately the main mirror surface of the circumference to a petal-shaped large piece and a petal-shaped small piece with an even number and executing the hinge-linking. CONSTITUTION:For a main mirror surface 1 of a parabolic antenna, the central part is divided and formed into a calyx-shaped piece 2 and the part of the circumference is alternately divided into plural petal-shaped large pieces 3 and petal-shaped small pieces with an even number. For these petal-shaped large pieces 3 and petal-shaped small pieces 4, both the right and left edge parts are hinge-linked to a calyx-shaped piece 2 at hinge parts h31, h32, h41 and h42. With hinge central lines H3 and H4 as a center, rotation and development are executed smoothly, the petal-shaped large pieces 3 and petal-syhaped small pieces 4 are constructed to be folded in a bud shape.
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