Horn antenna
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A horn antenna or microwave horn is an antenna that consists of a flaring metal waveguide shaped like a horn to direct radio waves in a beam. Horns are widely used as antennas at UHF and microwave fre
Pyramidal microwave horn antenna, with a bandwidth of 0.8 to 18 GHz. A coaxial cable feedline attaches to the connector visible at top. This type is called a ridged horn; the curving fins visible inside the mouth of the horn increase the antenna's bandwidth.
The first modern horn antenna in 1938 with inventor Wilmer L. Barrow.
Pyramidal horn antennas for a variety of frequencies. They have flanges at the top to attach to standard waveguides.
Corrugated conical horn antenna used as a feed horn on a Hughes Direcway home satellite dish. A transparent plastic sheet covers the horn mouth to keep out rain.
Arno Allan Penzias
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Arno Allan Penzias was an American physicist and radio astronomer. He shared the 1978 Nobel Prize in Physics with Robert Woodrow Wilson "for their discovery of cosmic microwave background radiation".
Penzias in 1982
Penzias and Wilson, standing under the 15 m (49 ft 3 in) Holmdel Horn Antenna in New Jersey that brought their most notable discovery