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  2. Werner Co. - Wikipedia

    en.wikipedia.org/wiki/Werner_Co.

    Werner Co. was founded in 1922 by Richard D. Werner as "R. D. Werner Co., Inc.," which specialized in metal moldings. R. D. Werner Co., Inc. became a leader in plastics extrusion during the World War II restrictions on civilian metal usage. After the war, Werner started working with aluminum and developed an emphasis on producing aluminum ...

  3. Fan-beam antenna - Wikipedia

    en.wikipedia.org/wiki/Fan-beam_antenna

    A fan-beam antenna is a directional antenna producing a main beam having a narrow beamwidth in one dimension and a wider beamwidth in the other dimension. This pattern will be achieved by a truncated paraboloid reflector or a circular paraboloid reflector. Since the reflector is narrow in the vertical plane and wide in the horizontal, it ...

  4. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    A lens antenna is made from a layer of dielectric, or a metal screen, or multiple waveguide structure of varying thickness, mounted in front of a feed antenna. The waveguide / screen / dialectric refracts the radio waves, focusing them on the feed antenna, similar to a focusing lens placed in front of a flashlight. Dielectric resonator

  5. Fixed ladder - Wikipedia

    en.wikipedia.org/wiki/Fixed_ladder

    This means that if there is a 4" (100 mm) gutter projecting from the side of a building, a fixed ladder would have to have standoff brackets that were at least 11" (7" + 4") (280 mm) in length. Cages: Cages are optional for fixed ladders with a floor to floor elevation of less than 20' (6100 mm). They are often available for ladders with ...

  6. Radio masts and towers - Wikipedia

    en.wikipedia.org/wiki/Radio_masts_and_towers

    The antenna used for broadcasting through the 1920s was the T-antenna, which consisted of two masts with loading wires on top, strung between them, requiring twice the construction costs and land area of a single mast. [2] (pp 77–78) In 1924 Stuart Ballantine published two historic papers which led to the development of the single mast antenna.

  7. Antenna array - Wikipedia

    en.wikipedia.org/wiki/Antenna_array

    An antenna array (or array antenna) is a set of multiple connected antennas which work together as a single antenna, to transmit or receive radio waves. [ 1 ] : p.149 [ 2 ] The individual antennas (called elements ) are usually connected to a single receiver or transmitter by feedlines that feed the power to the elements in a specific phase ...

  8. Folded unipole antenna - Wikipedia

    en.wikipedia.org/wiki/Folded_unipole_antenna

    The folded unipole antenna is a type of monopole mast radiator antenna used as a transmitting antenna mainly in the medium wave band for AM radio broadcasting stations. It consists of a vertical metal rod or mast mounted over and connected at its base to a grounding system consisting of buried wires. The mast is surrounded by a "skirt" of ...

  9. Mast radiator - Wikipedia

    en.wikipedia.org/wiki/Mast_radiator

    It consists of a ring-shaped toroidal iron core with the primary winding wrapped around it, mounted on a bracket extending from the concrete base below the antenna insulator, connected to the lighting power source. The secondary winding which provides power to the mast lights is a ring-shaped coil that threads through the toroidal core like two ...

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