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  2. Circularly disposed antenna array - Wikipedia

    en.wikipedia.org/wiki/Circularly_disposed...

    Direction-finding system Galeta Island, Panama. A circularly disposed antenna array (CDAA), sometimes referred to as a circularly disposed dipole array (CDDA) or a wullenweber, [1] is a large circular antenna array used for radio direction finding.

  3. Werner Co. - Wikipedia

    en.wikipedia.org/wiki/Werner_Co.

    Werner reported audited net sales of $472.3 million for the year ending Dec. 31, 2005. As of March 31, 2006, Werner reported assets of $201 million and liabilities of $473.4 million. [ 3 ] Werner Co. filed for Chapter 11 protection under the bankruptcy code in Delaware on June 12, 2006, primarily due to excessive leverage, significant increases ...

  4. Antenna rotator - Wikipedia

    en.wikipedia.org/wiki/Antenna_rotator

    An antenna rotator (or antenna rotor) is a device used to change the orientation, within the horizontal plane, of a directional antenna. Most antenna rotators have two parts, the rotator unit and the controller. The controller is normally placed near the equipment which the antenna is connected to, while the rotator is mounted on the antenna ...

  5. AN/FRD-10 - Wikipedia

    en.wikipedia.org/wiki/AN/FRD-10

    The system was four times more accurate than the prior Navy AN/GRD-6 system with bearing accuracy better than 0.5 degrees. [2] The Navy AN/FRD-10 was slightly smaller and had a narrower frequency range compared to the Air Force AN/FLR-9 system. [2] The FRD-10 had only 2 antenna rings, 870 feet (270 m) and 780 feet (240 m) diameters. [2]

  6. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    Inevitably some antennas won't conveniently fit into any one basic type, so the last section on real antennas is an "everything else" category for a few peculiar antennas that don't fit cleanly into any of the categories or subcategories used in this article; for example, random wire antennas and antennas that are laid down on the ground ...

  7. Radio masts and towers - Wikipedia

    en.wikipedia.org/wiki/Radio_masts_and_towers

    The pointed lower end of the antenna ended in a large ceramic insulator in the form of a ball-and-socket joint on a concrete base, relieving bending moments on the structure. The first, a 665 foot (203 m) half-wave mast was installed at radio station WABC's 50 kW transmitter at Wayne, New Jersey in 1931.

  8. Conformal antenna - Wikipedia

    en.wikipedia.org/wiki/Conformal_antenna

    Conformal antennas are a form of phased array antenna. They are composed of an array of many identical small flat antenna elements, such as dipole, horn, or patch antennas, covering the surface. At each antenna the current from the transmitter passes through a phase shifter device which are all controlled by a microprocessor (computer).

  9. Collinear antenna array - Wikipedia

    en.wikipedia.org/wiki/Collinear_antenna_array

    Collinear dipole array on repeater for radio station JOHG-FM on Mt. Shibisan, Kagoshima, Japan. In telecommunications, a collinear antenna array (sometimes spelled colinear antenna array) is an array of dipole or quarter-wave antennas mounted in such a manner that the corresponding elements of each antenna are parallel and collinear; that is, they are located along a common axis.

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