Communication and tracking antenna systems for satellites

Details Communication and tracking antenna systems for satellites Communication and tracking antenna systems for satellites

1996-10-30

1998-12-08

Wong, Don

Communications: radio wave antennas

Antennas

Plural separate diverse type

343700MS, 343781P, 343756, H01Q 2100, H01Q 1300

Patent

active

058476814

ABSTRACT:
A communication and tracking antenna is formed by embedding a tracking patch array in a shaped dual gridded reflector. The reflector includes first and second reflector grids that have orthogonally arranged grid lines and are respectively fed by feed horns. The patch array is positioned so that the first reflector grid is between the patch array and the first feed horn. The first reflector grid thus serves as a filter to remove unwanted polarization components and enhance the quality of both the tracking radiation and the radiation that is reflected from the second reflector grid. In other embodiments, a tracking array is positioned adjacent a reflector's perimeter.

REFERENCES:
patent: 4575726 (1986-03-01), Gounder
patent: 4625214 (1986-11-01), Parekh
patent: 4665405 (1987-05-01), Drabowitch et al.
patent: 5307077 (1994-04-01), Branigan et al.
patent: 5402137 (1995-03-01), Ramanujam et al.
patent: 5673056 (1997-09-01), Ramanujam et al.
James et al, "Superimposed dichroic microstrip antenna array", IEE Proceedings, vol. 135, Pt H, No. 5, Oct. 1988, pp. 304-312.

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