Coaxial horn antenna system
First Claim
1. A multi-band antenna system comprising:
- a main reflector having a shaped surface of revolution about a boresight axis of said antenna and being operable at a plurality of frequency bands spectrally offset from each other;
a multi-band feed system for said main reflector comprising a sub-reflector defining a second shaped surface of revolution about said boresight axis of said antenna and a plurality of feed horns decoupled from said sub-reflector;
a first one of said horns installed on said boresight axis at a first location separated by a first gap from a vertex of said sub-reflector, said first horn having a plurality of corrugations defining a profile extending from a throat of said first horn and along a tapered portion of said first horn, said profile shaped for producing a radiation pattern for illuminating said sub-reflector at a first frequency band; and
a second one of said horns installed coaxial within said first one of said horns and separated from said vertex on said boresight axis by a second gap, said second horn configured for producing a radiation pattern illuminating said sub-reflector on a second frequency band spectrally offset from said first frequency band.
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Accused Products
Abstract
An antenna feed system includes a plurality of RF horn antennas (201, 202) for operating on a plurality of RF frequency bands. A first one of the feed horns (202) can have a boresight axis and is configured for operating at a first one of the frequency bands. A second one of the feed horns (201) is positioned coaxially within the first one of the feed horns (202) and is configured for operating at least at a second one of the frequency bands. Further, the first one of the feed horns (202) is a corrugated horn that has a plurality of corrugations (204) formed on an interior surface defining a profile. The profile extends substantially from a throat (205) of the first feed horn and along a tapered portion of the first feed horn. The profile substantially minimizes an interaction of the corrugations with the second feed horn.
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Citations
38 Claims
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1. A multi-band antenna system comprising:
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a main reflector having a shaped surface of revolution about a boresight axis of said antenna and being operable at a plurality of frequency bands spectrally offset from each other;
a multi-band feed system for said main reflector comprising a sub-reflector defining a second shaped surface of revolution about said boresight axis of said antenna and a plurality of feed horns decoupled from said sub-reflector;
a first one of said horns installed on said boresight axis at a first location separated by a first gap from a vertex of said sub-reflector, said first horn having a plurality of corrugations defining a profile extending from a throat of said first horn and along a tapered portion of said first horn, said profile shaped for producing a radiation pattern for illuminating said sub-reflector at a first frequency band; and
a second one of said horns installed coaxial within said first one of said horns and separated from said vertex on said boresight axis by a second gap, said second horn configured for producing a radiation pattern illuminating said sub-reflector on a second frequency band spectrally offset from said first frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An antenna feed system, comprising:
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a plurality of RF horn antennas for operating on a plurality of RF frequency bands;
a first one of said horns having a boresight axis and configured for operating at a first one of said frequency bands;
a second one of said horns positioned coaxially within said first horn, said second horn configured for operating at least at a second one of said frequency bands;
wherein said first horn is a corrugated horn having a plurality of corrugations formed on an interior surface, said corrugations defining a profile extending substantially from a throat of said first feed horn and along a tapered portion of said first feed horn. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An antenna feed system, comprising:
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a plurality of RF horn antennas for operating on a plurality of RF frequency bands;
a first one of said horns having a boresight axis and configured for operating at a first one of said frequency bands;
a second one of said horns positioned coaxially within said first one of said horns along said boresight axis, said second horn configured for operating at least at a second one of said frequency bands;
wherein said first horn is a corrugated horn that has a plurality of corrugations formed on an interior surface, said corrugations extending substantially continuously along a throat portion of said first horn and a tapered portion of said first horn to define a profile, said profile substantially minimizing an interaction of said corrugations with said second horn. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification