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2. Antenna rotator - Wikipedia

   en.wikipedia.org/wiki/Antenna_rotator

   e. 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 ...

3. Channel Master - Wikipedia

   en.wikipedia.org/wiki/Channel_Master

   In the 1980s, Channel Master was the only second source for General Instrument (GI)'s Videocipher II module, a building block for satellite television receivers, under a licensing agreement for which Avnet paid GI a million dollars. The Channel Master 4251, a high-performance parabolic UHF television antenna, stood about seven feet in diameter ...

4. Log-periodic antenna - Wikipedia

   en.wikipedia.org/wiki/Log-periodic_antenna

   A log-periodic antenna (LP), also known as a log-periodic array or log-periodic aerial, is a multi-element, directional antenna designed to operate over a wide band of frequencies. It was invented by John Dunlavy in 1952. The most common form of log-periodic antenna is the log-periodic dipole array or LPDA, The LPDA consists of a number of half ...

5. Yagi–Uda antenna - Wikipedia

   en.wikipedia.org/wiki/Yagi–Uda_antenna

   A modern high-gain UHF Yagi television antenna with 17 directors, and one reflector (made of four rods) shaped as a corner reflector. Drawing of Yagi–Uda VHF television antenna from 1954, used for analog channels 2–4, 54–72 MHz (U.S. channels). It has five elements: three directors (to left) one reflector (to right) and a driven element ...

6. Radio masts and towers - Wikipedia

   en.wikipedia.org/wiki/Radio_masts_and_towers

   A radio mast base showing how virtually all lateral support is provided by the guy-wires. The terms "mast" and "tower" are often used interchangeably. However, in structural engineering terms, a tower is a self-supporting or cantilevered structure, while a mast is held up by stays or guy-wires. [1] A mast.

7. Satellite dish - Wikipedia

   en.wikipedia.org/wiki/Satellite_dish

   v. t. e. A satellite dish is a dish-shaped type of parabolic antenna designed to receive or transmit information by radio waves to or from a communication satellite. The term most commonly means a dish which receives direct-broadcast satellite television from a direct broadcast satellite in geostationary orbit.