The horn antenna was armored except for its open end.

I shifted to the horn antenna and tried again.

A well-known example of this is the horn antenna.

Horn antennas can also be constructed with high gain, but are less commonly seen.

Many towers were designed to carry horn antennas but no longer do so, and look rather odd as a result.

I shifted to horn antenna, aiming at the glint of light.

These are the common types of horn antenna.

In about 1960, dual-band horn antennas started to be used widely, and a few of these survive to the present day.

The aperture efficiency ranges from 0.4 to 0.8 in practical horn antennas.

Separate horn antennas were used for transmitting and receiving.

Most practical horn antennas are designed as optimum horns.

The Andover Earth Station was equipped with a giant horn antenna, 7 stories high and weighing 340 tons.

The horn antenna is used where high gain is needed, the wavelength is short (microwave) and space is not an issue.

The medium gain horn antennas will be used for housekeeping data downlink when the high gain antenna is not facing Earth.

This has advantages over ordinary (conventional) curved lenses, which results in a much improved directivity for this horn antenna configuration.

Tuba used a horn antenna built of mesh wire 150 feet long and driven through 22- by 6- inch waveguides, possibly the largest ever built.

Bell Laboratory engineers designed a large horizontal conical horn antenna with a parabolic reflector at its mouth that re-directed the beam.

Wavelengths are small enough that they can be focused into narrow beams by parabolic and horn antennas from a half meter to five meters in diameter.

"Astronomy and Astrophysics Horn Antenna."

An examination of the microwave horn antenna showed it was full of pigeon droppings (which Penzias described as "white dielectric material").

An advantage of horn antennas is that since they have no resonant elements, they can operate over a wide range of frequencies, a wide bandwidth.

Akatsuki also has a pair of medium gain horn antennas mounted on turntables and two low gain antennas for command uplink.

Pyramidal horn (a, right) - a horn antenna with the horn in the shape of a four-sided pyramid, with a rectangular cross section.

As with the dish antenna, a feed to the receiver or from the transmitter is placed at the focus, the feed typically consisting of a horn antenna.

This structure houses equipment and controls for the Horn Antenna and is included as a part of the designation as a National Historic Landmark.