Communications: radio wave antennas – Antennas – Wave guide type
Patent
1982-02-25
1984-11-20
Lieberman, Eli
Communications: radio wave antennas
Antennas
Wave guide type
343914, 343779, H01Q 1919
Patent
active
044841973
ABSTRACT:
The present invention relates to a multibeam antenna arrangement having minimal primary aberration of astigmatism and coma over a wide area of the focal surface of the antenna. The present antenna comprises a plurality of N reflectors arranged confocally in a sequence along a feed axis of the antenna and at least one feed disposed in the vicinity of a focal point on the focal surface. The reflectors and the at least one feed are further arranged to provide an equivalent centered antenna arrangement with the longitudinal axis of the feed substantially parallel to an equivalent axis of the centered arrangement for eliminating astigmatism. Primary coma is then eliminated by deforming two of the N reflectors in a predetermined manner.
REFERENCES:
patent: 4145695 (1979-03-01), Gans
patent: 4166276 (1979-08-01), Dragone
patent: 4224626 (1980-09-01), Sternberg
Panicali et al., A reflector Antenna Corrected for . . . Aberrations, Proc. of IEEE, vol. 59, No. 2, Feb. 1971, pp. 311-312.
Wong et al., Astigmatic Correction by a Deformable Subreflector, AP-S Int. Symp. vol. II, Seattle, Wash. 1979, pp. 706-709.
AT&T Bell Laboratories
Lieberman Eli
Pfeifle Erwin W.
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