Reflector antenna feed device
AssigneeAlcatel Lucent
InventorsDenis TUAU, Armel Le Bayon
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Abstract
The antenna feed device (4) of the invention comprises a reflector (2) into which a circular or rectangular section waveguide (8) opens out, the waveguide including a cylindrical or conical radiating aperture (10, 9) at its end. A lens (22) of dielectric material is inserted in part into the inside of the aperture, the portion (23) of the lens (22) projecting out from the waveguide (8) being substantially in the form of a truncated cone and having its smaller diameter end (24) facing outwards. The end (24) includes a central cavity (25) of shape that is given by the solution to a polynomial equation of the “b+ax+cx2+dx3” type, or to a logarithmic equation.
Claims12
A device for feeding an antenna comprising a reflector (2) into which there opens out a waveguide (8) of circular or rectangular section and having at its end a cylindrical or conical radiating aperture (10 or 9), a lens (22) of dielectric material being inserted in part into the inside of said aperture, the device being characterized in that the portion (23) of the lens that projects from the waveguide is substantially in the form of a truncated cone with its smaller diameter end (24) facing outwards, said end (24) having a central cavity (25) of shape given by the solution of a polynomial equation of the “b+ax+cx2+dx3” type or to a logarithmic equation.
A reflector antenna comprising a feed device (4) including a reflector (2) into which there opens out a waveguide (8) of circular or rectangular section having a cylindrical or conical radiating aperture at its end, a lens (22) of dielectric material being inserted in part inside said aperture, the portion (23) of the lens projecting out from the waveguide being substantially in the shape of a truncated cone and having its smaller diameter end (24) facing outwards, said end (24) including a central cavity (25) of shape given by the solution to a polynomial equation of the “b+ax+cx2+dx3” type, or to a logarithmic equation.
Dependencies are inferred from the claim text.