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2. Citizens band radio - Wikipedia

   en.wikipedia.org/wiki/Citizens_band_radio

   Typical 1980s CB radio intended for use at a fixed location and used with outdoor antenna. "Base stations" are usually operated on household AC power but can also from a vehicle's DC power system if operated in a vehicle or from an emergency battery source.

3. Shortwave broadband antenna - Wikipedia

   en.wikipedia.org/wiki/Shortwave_broadband_antenna

   Even automatic antenna tuners will not work with frequency hopping signals. A less ambitious idea of “broadband antenna” (often called “wideband”) is an antenna that continuously covers the proportionally widest amateur band, that spans 3.5–4.0 MHz (a 14% bandwidth), without requiring an antenna tuner. There are many such designs, but ...

4. Random wire antenna - Wikipedia

   en.wikipedia.org/wiki/Random_wire_antenna

   Random wire antenna. A wire antenna kit, with a coil of wire, strain insulators and a balun. When installed the wire is supported by buildings or trees using the insulators to prevent a short circuit to ground. A random wire antenna is a radio antenna consisting of a long wire suspended above the ground, whose length does not bear a particular ...

5. Antenna types - Wikipedia

   en.wikipedia.org/wiki/Antenna_types

   Antennas can be classified in various ways, and various writers organize the different aspects of antennas with different priorities, depending on whether their text is most focused on specific frequency bands; or antenna size, construction, and placement feasibility; or explicating principles of radio theory and engineering that underlie, guide, and constrain antenna design.

6. Cellular repeater - Wikipedia

   en.wikipedia.org/wiki/Cellular_repeater

   Cellular repeater. A cellular repeater (also known as cell phone signal booster or cell phone signal amplifier) is a type of bi-directional amplifier used to improve cell phone reception. [citation needed] A cellular repeater system commonly consists of a donor antenna that receives and transmits signal from nearby cell towers, coaxial cables ...

7. 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.