Shaped offset-fed dual reflector antenna

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

H - Electricity

01

Q

351/54

H01Q 19/19 (2006.01)

Patent

CA 1232061

ABSTRACT OF THE DISCLOSURE 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 a primary radiator inclined from a boresight axis of the antenna, and shaped non-quadratic surfaces in the main reflector and/or the 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 type antenna is used, and the aperture field distribution is Tailor's-40 dB distribution, the incline angle is preferably 16 degrees.

474930

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