Reflector antenna system having reduced blockage effects

Details Reflector antenna system having reduced blockage effects Reflector antenna system having reduced blockage effects

1985-05-30

1987-08-25

Nussbaum, Marvin L.

Communications: radio wave antennas

Antennas

Wave guide type

343781R, 343781CA, 343782, 343837, H01Q 1919, H01Q 1910

Patent

active

046896325

ABSTRACT:
A reflector antenna system with reduced blockage effects is provided by placing a compensating reflector between the surface of the main curved reflector and its primary feed to intercept illuminating radiation which would otherwise be blocked by the feed. The compensating reflector reflects the intercepted radiation with a beam pattern which is essentially identical to the substractive blockage pattern. The compensating reflector is spaced from the main reflecting surface to place its beam pattern in phase opposition to the blockage pattern to cancel common components from the blockage pattern.

REFERENCES:
patent: 2370053 (1940-12-01), Lindenblad
patent: 2803009 (1957-08-01), Seamans
patent: 3195137 (1965-07-01), Jakes, Jr.
patent: 3218643 (1965-11-01), Hannan et al.
patent: 3231893 (1966-01-01), Hogg
patent: 3235870 (1966-02-01), Hannan
patent: 4274098 (1981-06-01), Renau et al.
patent: 4500882 (1985-02-01), Katagi et al.
patent: 4509055 (1985-04-01), Fassett

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