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Antenna (radio) - Wikipedia, the free encyclopedia (2593 words) |
 | Complex impedance of an antenna is related to the electrical length of the antenna at the wavelength in use. |
 | The polarization of an antenna is the polarization of the signals it emits. |
 | The Phased array antenna is a group of independently fed active elements in which the relative phases of the respective signals feeding the elements are varied in such a way that the effective radiation pattern of the array is reinforced in a desired direction and suppressed in undesired directions. |
| List of antenna terms - encyclopedia article about List of antenna terms. (1971 words) |
 | Cassegrain antenna In telecommunications and radar, a Cassegrain antenna is an antenna in which the feed radiator is mounted at or near the surface of a concave main reflector and is aimed at a convex secondary reflector slightly inside the focus of the main reflector. |
 | intermediate-field region Intermediate-field region: For an antenna, the transition region--lying between the near-field region and the far-field region--in which the field strength of an electromagnetic wave is dependent upon the inverse distance, inverse square of the distance, and the inverse cube of the distance from the antenna. |
 | The radiation pattern for the isotropic antenna is a sphere with the antenna at its center. |