Foldable and unfoldable antenna reflector

Details Foldable and unfoldable antenna reflector Foldable and unfoldable antenna reflector

1985-05-31

1987-04-14

Frankfort, Charles

Communications: radio wave antennas

Antennas

Antenna components

343DIG2, 343881, H01Q 1520

Patent

active

046582657

ABSTRACT:
An antenna reflector, for example for a satellite or spacecraft, has ribs urnalled to a central body by a first journal axis. Each rib has a radially inner section tiltable and lockable relative to the central body, and a radially outer section journalled to the inner rib section at a second journal axis for tilting and locking the outer rib section relative to the inner rib section. A motor driven cable drive and respective pulleys are so arranged that the inner rib sections are first partially unfolded before the outer rib sections begin to be unfolded. The outer rib sections then are moved faster than the inner rib sections so that both rib sections reach the fully unfolded state substantially simultaneously. The folding takes place in the reverse order, whereby the outer rib sections are folded first. The reflector netting is stretched out only after the ribs have been locked into the unfolded state.

REFERENCES:
patent: 3496687 (1970-02-01), Greenberg et al.
patent: 3503072 (1970-03-01), Thompson
patent: 3525483 (1970-08-01), VanAlstyne
patent: 3631505 (1971-12-01), Carman
patent: 3699581 (1972-10-01), Hall et al.
patent: 3717879 (1973-02-01), Ganssle
patent: 4352113 (1982-09-01), Labruyere 343915

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