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US 6,771,225 B2Granted
Low cost high performance antenna for use in interactive satellite terminals
AssigneeEutelsat SA
InventorDaniel Tits
Life of this patent
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Abstract
The invention relates to a Interactive Satellite Terminal antenna system comprising an antenna to which is associated a feed horn. This antenna systems characterized in that it comprises an elliptical parabolic main reflector and a corrugated feed horn (2) having an outer elliptical aperture and an inner cylindrical waveguide with an inner portion (7) and a step section (8) and in that cavity elements (10) are added to the step section (8) for compensating cross-polar components. The invention can be used in antenna systems.
Claims18
Interactive Satellite Terminal antenna system comprising:
- an elliptical parabolic main reflector for reflecting an electromagnetic field having a fundamental mode and a cross polar component;
- and
- a compensated feed horn for feeding said electromagnetic field to said elliptical parabolic main reflector, said compensated feed horn having along a longitudinal axis from said elliptical parabolic main reflector an outer elliptical aperture, a step section with at least one slot to excite a higher order mode of reflected electromagnetic field and counteract said cross polar component, and an inner cylindrical waveguide.
Dependencies are inferred from the claim text.