Dual band satellite communications antenna feed
AssigneeRaytheon Company
InventorsJohn Joseph Hanlin, Yueh-Chi Chang, Richard Henry Holden
Life of this patent
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Abstract
An antenna feed that transmits in a single vertical or horizontal linear polarization at commercial Ka-band while simultaneously receiving both vertical and horizontal polarizations at commercial KU-band is presented. The antenna feed includes a metal feed horn, an integrated corrugated ring filter, an outer conductor disposed coaxially about the feed horn, a hollow inner conductor disposed coaxially within the feed horn and a polyrod disposed within the hollow inner conductor. The antenna feed further includes a PCB having receive channel RF probes, 180-degree hybrid combiners and LNB circuitry. The PCB is surrounded by a housing which is attached to the feed horn.
Claims18
An antenna feed comprising:
- a feed horn;
- an outer conductor in electrical communication with and contiguous to said feed horn;
- a hollow inner conductor disposed coaxially within said outer conductor;
- a polyrod having at least a portion thereof disposed within said hollow inner conductor and projecting into a throat of said metal feed horn, said polyrod having a shape to provide proper beamwidth and match at a first frequency band;
- and
- a printed circuit board (PCB) including a pair of receive channel RF probes, 180-degree hybrid combiner and low noise block (LNB) circuitry for reception of a second frequency band, said second frequency band being of lower frequency than said first frequency band, said PCB mounted generally perpendicular to the axis of said hollow inner conductor, said inner conductor passing through a central aperture in said PCB, said pair of receive channel RF probes located substantially in the plane of the PCB and disposed along a diameter of said outer conductor.
Dependencies are inferred from the claim text.