Communications: radio wave antennas – Antennas – Antenna components
Patent
1998-12-14
2000-06-27
Le, Hoanganh
Communications: radio wave antennas
Antennas
Antenna components
343912, 343DIG2, H01Q 1520
Patent
active
060812443
ABSTRACT:
An antenna reflector comprising a single membrane antenna reflector surface and means for supporting said antenna reflector surface are disclosed wherein a shape of said antenna reflector is reconfigured to assume a stowed position. The shape of the stowed reflector allowing a large, single piece antenna reflector to be stowed efficiently inside a minimum payload area of the space vehicle. The method and apparatus of this invention ensure that both the deployed and stowed surfaces of the membrane antenna reflector are isometric, or length preserving, mappings of one another. The circumferential dimension of the antenna reflector is decreased having the effect of rolling up the paraboloid so that its surface is similar to a cone. Additionally, the method and apparatus are employed such that when the antenna reflector surface is deployed the antenna reflector membrane unrolls without stretching.
REFERENCES:
patent: 5451975 (1995-09-01), Miller et al.
patent: 5635946 (1997-06-01), Francis
patent: 5990851 (1997-06-01), Henderson et al.
Le Hoang-anh
Space Systems Loral, Inc.
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