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2. Radio masts and towers - Wikipedia

   en.wikipedia.org/wiki/Radio_masts_and_towers

   A mast radiator or mast antenna is a radio tower or mast in which the whole structure is an antenna. Mast antennas are the transmitting antennas typical for long or medium wave broadcasting. Structurally, the only difference is that some mast radiators require the mast base to be insulated from the ground.

3. Mast radiator - Wikipedia

   en.wikipedia.org/wiki/Mast_radiator

   The RF current density in the earth, and thus the power loss per square meter, increases the closer one gets to the ground terminal at the base of the mast, [16] so the radial ground system can be thought of as replacing the soil with a higher conductivity medium, copper, in the parts of the ground carrying high current density, to reduce power ...

4. List of RF connector types - Wikipedia

   en.wikipedia.org/wiki/List_of_RF_connector_types

   NMO mount connector (new Motorola mount), removable mobile antenna connector uses a 3 ⁄ 4 inch (19 mm) mounting hole and has a large base with a 1 1/8" – 18 tpi thread for attaching the antenna. SC connector, screw version of C connector [not to be confused with the fiber optic connector of the same name]

5. Counterpoise (ground system) - Wikipedia

   en.wikipedia.org/wiki/Counterpoise_(ground_system)

   Counterpoises are typically used in antenna systems for radio transmitters where a good earth ground connection cannot be constructed.. Monopole antennas used at low frequencies, below 3 MHz, such as the mast radiator antennas used for AM broadcasting, require the radio transmitter to be electrically connected to the Earth under the antenna; this is called a ground (or earth).

6. Monopole antenna - Wikipedia

   en.wikipedia.org/wiki/Monopole_antenna

   For monopole antennas operating at lower frequencies, below 20 MHz, the ground plane is usually the Earth; in this case the antenna is a vertical mast mounted on the ground on an insulator to isolate it electrically from the ground. One side of the feedline is connected to the mast and the other to an Earth ground at the base of the antenna. In ...

7. Antenna types - Wikipedia

   en.wikipedia.org/wiki/Antenna_types

   The wires outline the shape of the letter 'T', hence the name. The dangling wire may run directly into the back of a radio, but more often a 'T' antenna is fed by a cable attached near where the dangling wire comes to ground. Additionally, the antenna requires a low resistance ground system, normally centered directly below the bottom of the 'T ...