Communications: radio wave antennas – Antennas – Wave guide type
Patent
1979-04-26
1981-02-10
Lieberman, Eli
Communications: radio wave antennas
Antennas
Wave guide type
343781CA, 343837, 343DIG2, H01Q 1912
Patent
active
042505089
ABSTRACT:
The present invention relates to an antenna arrangement capable of generating one or more linearly scanning spot beams which are scanned over separate strip portions of the entire field of view of the antenna. The antenna arrangement comprises an optical system comprising an aperture and a focal plane, and a novel feed arrangement. The feed arrangement comprises a separate linear phased array disposed within a separate rectangular waveguide section for each linear scanning beam desired. An offset curved reflector, disposed in each waveguide section, converts a linearly scanning planar wavefront generated by an array into a converging beam forming a linearly moving point source on the antenna's focal plane with the principle ray of each instantaneous wavefront being directed at the center of an image of the aperture of the optical system as seen by the feed arrangement.
REFERENCES:
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patent: 2656464 (1953-10-01), Robinson
patent: 2870441 (1959-01-01), Hines
patent: 3067421 (1962-12-01), O'Nians et al.
patent: 3267472 (1966-08-01), Fink
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patent: 3680140 (1972-06-01), Chalfin et al.
patent: 3766558 (1973-09-01), Kuechken
patent: 3864689 (1975-02-01), Young
Dragone; Imaging Reflector Arrangements to Form a Scaning Beam Using a Small Array; B.S.T.J. Vol. 58, No. 2, Feb. 1979, pp. 501-515.
Bell Telephone Laboratories Incorporated
Lieberman Eli
Pfeifle Erwin W.
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