antenna: Quick Facts

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Last updated

Oct. 14, 2026

Facts

Also Known As	aerial

Photos

ASR-9 airport surveillance radar

Multiple tall telecommunications towers with red lights stand on a hilltop at dusk in Phoenix, Arizona, silhouetted against a darkening sky.

The satellite's solar panels are arrays of solar cells that provide the electrical energy needed for its functions, the power being stored in batteries. Its antennas may be 8 ft (2.5 m) in diameter and may transmit wide-area-of-coverage beams or narrowly focused “spot” beams.

Figure 12: Block diagram of monochrome television transmitter.

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Topics

receiving antenna sparkless antenna circuit transmitting antenna half-wave dipole antenna directional antenna omnidirectional antenna parabolic antenna antenna array loop antenna counterpoise cable transducer waveguide electric circuit electrode microelectromechanical system speech recognition solid-state device

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Key People

Guglielmo Marconi

Guglielmo Marconi

Italian physicist

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George Harold Brown

American engineer

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Alexander Meissner

Austrian engineer