Communications: radio wave antennas – Antennas – Wave guide type
Patent
1984-06-14
1986-10-21
Lieberman, Eli
Communications: radio wave antennas
Antennas
Wave guide type
343836, 343840, 343914, H01Q 1516, H01Q 1919
Patent
active
046188673
ABSTRACT:
The present invention relates to a scanning beam antenna comprising a doubly-curved main reflector, a doubly-curved subreflector and at least one linear array feed. The main reflector is doubly-curved in two planes to produce a separate first focus for each feed in a first plane in front of the subreflector and a separate second focus for each feed in a second orthogonal plane behind the subreflector. The subreflector is curved to refocus each second focus of the main reflector to coincide with the image line of a first axis on the reflecting surface of the main reflector in the first plane. Each feed array is disposed at a separate secondary focus of the combination of the main reflector and subreflector. The resulting antenna provides very little phase error due to aberrations as each beam is linearly scanned.
REFERENCES:
patent: 4024543 (1977-05-01), Vokurka
patent: 4203105 (1980-05-01), Dragone et al.
patent: 4208661 (1980-06-01), Vokurka
patent: 4250508 (1981-02-01), Dragone
patent: 4315262 (1982-02-01), Acampora et al.
patent: 4339757 (1982-07-01), Chu
patent: 4343004 (1982-08-01), Ohm
patent: 4413263 (1983-11-01), Amitay et al.
patent: 4503435 (1985-03-01), Dragone
patent: 4535338 (1985-08-01), Ohm
AT&T Bell Laboratories
Lieberman Eli
Pfeifle Erwin W.
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