Radiation pattern
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An antenna radiation pattern is the directional dependence of the field strength of the radio waves from the antenna or other source.
A rectangular radiation plot, an alternative presentation method to a polar plot
Maszt radiowy w Konstantynowie
Directional antenna
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A directional antenna or beam antenna is an antenna that radiates or receives greater radio wave power in specific directions. Directional antennas can radiate radio waves in beams, when greater conce
Radiation pattern
…angles, separated by "nulls" at which the radiation goes to zero. The larger the antenna is compared to a wavelength, the more lobes there will be. In a directional antenna in which the objective is to emit the radio waves in one particular direction, the antenna is designed to radiate most of its power in the lobe directed…
A multi-element, log-periodic dipole array
A 70-meter Cassegrain radio antenna at GDSCC, California
An early example (1922) of a directional AM radio transmitter using a long wire antenna, built for WOR, then in Newark, New Jersey and targeting both New York City and Philadelphia in addition to Newark.
Holmdel Horn Antenna in Holmdel, New Jersey (1960s). Built to support the Echo satellite communication program, it was later used in experiments that revealed the Cosmic microwave background permeating the universe.