Coaxial horn antenna system

An antenna feed system, comprising:

• a plurality of feedhorns 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.

An antenna feed system, comprising:

• a plurality of feedhorns 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.