On-orbit reconfigurability of a shaped reflector with feed/refle

Details On-orbit reconfigurability of a shaped reflector with feed/refle On-orbit reconfigurability of a shaped reflector with feed/refle

1996-11-27

2000-02-29

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With means for moving directive antenna for scanning,...

343781P, 343839, H01Q 312, H01Q 1910

Patent

active

060315024

ABSTRACT:
A system and method for changing the radiation pattern of an antenna assembly of a satellite in orbit is provided. The antenna assembly includes a reflector antenna fed by a feed assembly. The reflector antenna transmits and receives signals within a radiation pattern. The reflector antenna and the feed assembly are movably mounted to a sliding mechanism so that they can be displaced with respect to one another. The displacement causes defocusing as the reflector antenna is displaced from the focus point. The defocusing causes the radiation pattern to become more compact or broadened. Thus, the radiation pattern of the satellite provided with a single reflector antenna and a single feed element may be changed while the satellite is in orbit. The system and method include gimballing the reflector antenna to steer the radiation pattern.

REFERENCES:
patent: 3302205 (1967-01-01), Johnson
patent: 3832715 (1974-08-01), Afifi et al.
patent: 3882503 (1975-05-01), Gamara
patent: 4586051 (1986-04-01), Saitto et al.
patent: 4772892 (1988-09-01), Payelian et al.
patent: 5546097 (1996-08-01), Ramanujam et al.
patent: 5579018 (1996-11-01), Francis et al.

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