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2. Twin-lead - Wikipedia

   en.wikipedia.org/wiki/Twin-lead

   For this reason, when attaching a twin-lead line to a coaxial cable connection, such as the 300 Ω twin-lead from a domestic television antenna to the television's 75 ohm coax antenna input, a balun with a 4:1 ratio is commonly used. Its purpose is double: First, it transforms twin-lead's 300 Ω impedance to match the 75 Ω coaxial cable ...

3. Guy-wire - Wikipedia

   en.wikipedia.org/wiki/Guy-wire

   Conductive guy cables for radio antenna masts can catch and deflect radiation in unintended directions, so their electrical characteristics must be included in the design. Often the guy wire is divided by strain insulators into isolated sections whose lengths are not resonant with the transmission frequencies.

4. Coaxial antenna - Wikipedia

   en.wikipedia.org/wiki/Coaxial_antenna

   In the most basic form, a quarter-wavelength section of coaxial cable is prepared such that the inner and outer conductors are separate but still attached to the remaining cable. The outer (shield) conductor is connected to a quarter-wavelength conducting sleeve into which the cable is inserted, and the inner conductor protrudes vertically ...

5. G5RV antenna - Wikipedia

   en.wikipedia.org/wiki/G5RV_antenna

   A transmatch (antenna tuner) is not required to use this antenna near its nominal design frequency of 14 MHz, and judicious length adjustments can sometimes include one other frequency band. All other frequencies require a transmatch. [citation needed] There are many variants of the G5RV antenna. Two variations of the G5RV design, called ZS6BKW ...

6. Random wire antenna - Wikipedia

   en.wikipedia.org/wiki/Random_wire_antenna

   Often random wire antennas are also (inaccurately) referred to as long-wire antennas.There is no accepted minimum size, but actual long-wire antennas must be greater than at least a quarter-wavelength (⁠ 1 / 4 ⁠ λ) or perhaps greater than a half (⁠ 1 / 2 ⁠ λ) at the frequency the long wire antenna is used for, and even a half-wave may only be considered "long-ish" rather than "truly ...

7. World's longest undersea and land power cable switched ... - AOL

   www.aol.com/worlds-longest-undersea-land-power...

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8. Wi-Fi over Coax - Wikipedia

   en.wikipedia.org/wiki/Wi-Fi_over_Coax

   Coaxial cables with characteristic impedance of 75 Ω, such as RG-6 cables used for in-building television distribution, can also be used by incorporating impedance converters. [1] As part of a distributed antenna system , Wi-Fi over Coax can connect multiple floors of a home or office via power dividers and zoned antennas either passively or ...

9. Antenna types - Wikipedia

   en.wikipedia.org/wiki/Antenna_types

   A modified mast antenna, usually grounded at its base, augmented by one or several parallel wires called "skirt wires" that attach to the mast part-way up the antenna. The skirt wires can attach at any height between part-way up and the top of the mast. One or more of the skirt wires is fed with the signal, similar to a gamma match.