Shaped offset-fed dual reflector antenna

Details Shaped offset-fed dual reflector antenna Shaped offset-fed dual reflector antenna

1985-02-25

1988-11-08

Sikes, William L.

Communications: radio wave antennas

Antennas

Wave guide type

343781CA, H01Q 1914

Patent

active

047836644

ABSTRACT:
A shaped offset-fed dual reflector antenna having a main reflector, a sub-reflector and a primary radiator which do not block the wave-path of said main reflector is improved by using an inclined primary radiator from a boresight axis of the antenna, and the shaped non-quadratic surface in said main reflector and/or said sub-reflector, to provide the desired aperture field distribution, improved cross-polarization characteristics, and improved side-lobe characteristics. The incline angle of the primary radiator is in the range between 10 degrees and 40 degrees. When a gregorian antenna is used, and the aperture field distribution is Tailor's -40 dB distribution, said incline angle is preferably 16 degrees.

REFERENCES:
patent: 4343004 (1982-08-01), Ohm
patent: 4425566 (1984-01-01), Dragone
patent: 4464666 (1984-08-01), Watanabe et al.
patent: 4503435 (1985-03-01), Dragone
patent: 4603334 (1986-07-01), Yoshihiko et al.
"A Shaped Offset-Fed Dual Reflector Antenna", in IEEE Transactions and Propagation, vol. AP-27, No. 2, Mar. 1979, pp. 165-169.

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