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horn antenna


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An antenna in the shape of a flared horn. It is often fed by a waveguide. A small horn is often used as the feed at the focus of a parabolic antenna. The cosmic microwave background was first detected with a large horn antenna. Horn antennas have very low side lobes and are thus less affected by radio interference than parabolic antennas.

Subjects: Astronomy and Astrophysics.


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