Electrical cable type with concentric inner conductor, insulator, and conducting shield
"Coax" redirects here. For the act of coaxing, see Persuasion.
RG-59 flexible coaxial cable composed of:
Outer plastic sheath
Woven copper shield
Inner dielectric insulator
Copper core
Coaxial cable, or coax (pronounced /ˈkoʊ.æks/), is a type of electrical cable consisting of an inner conductor surrounded by a concentric conducting shield, with the two separated by a dielectric (insulating material); many coaxial cables also have a protective outer sheath or jacket. The term coaxial refers to the inner conductor and the outer shield sharing a geometric axis.
Coaxial cable is a type of transmission line, used to carry high-frequency electrical signals with low losses. It is used in such applications as telephone trunk lines, broadband internet networking cables, high-speed computer data busses, cable television signals, and connecting radio transmitters and receivers to their antennas. It differs from other shielded cables because the dimensions of the cable and connectors are controlled to give a precise, constant conductor spacing, which is needed for it to function efficiently as a transmission line.
In his 1880 British patent, Oliver Heaviside showed how coaxial cable could eliminate signal interference between parallel cables.
Coaxial cable was used in the first (1858) and following transatlantic cable installations, but its theory was not described until 1880 by English physicist, engineer, and mathematician Oliver Heaviside, who patented the design in that year (British patent No. 1,407).[1]
^Nahin, Paul J. (2002). Oliver Heaviside: The Life, Work, and Times of an Electrical Genius of the Victorian Age. JHU Press. ISBN 0-8018-6909-9.
Coaxialcable, or coax (pronounced /ˈkoʊ.æks/), is a type of electrical cable consisting of an inner conductor surrounded by a concentric conducting shield...
axis. The two-dimensional analog is concentric. Common examples: A coaxialcable is a three-dimensional linear structure.[citation needed] It has a wire...
Cable television is a system of delivering television programming to consumers via radio frequency (RF) signals transmitted through coaxialcables, or...
scanners. Different types of network cables, such as coaxialcable, optical fiber cable, and twisted pair cables, are used depending on the network's...
Triaxial cable, often referred to as triax for short, is a type of electrical cable similar to coaxialcable, but with the addition of an extra layer...
their antennas. While coaxialcables can go longer distances and have better protection from EMI than twisted pairs, coaxialcables are harder to work with...
surface of the coaxial shield is actually unbalanced. If that current can be blocked, then the coax becomes a "balanced line". Coaxialcable's great advantage...
Ethernet uses a thick coaxialcable as a shared medium. This was largely superseded by 10BASE2, which used a thinner and more flexible cable that was both cheaper...
glass (RFoG) and coaxialcable infrastructure. Cable modems are primarily used to deliver broadband Internet access in the form of cable Internet, taking...
a single wire. After mid-century, coaxialcable came into use, with amplifiers. Late in the 20th century, all cables installed used optical fiber as well...
sufficiently short segment of cable (much smaller than a wavelength, so that these quantities are not dependent on Z). The coaxialcable is specified as having...
was invented by Alexander Graham Bell. Coaxialcable, or coax (pronounced /ˈkoʊ.æks/) is a type of electrical cable that has an inner conductor surrounded...
almost no radiation loss. Coaxialcables are commonly used at audio frequencies and above for convenience. A coaxialcable has a conductive wire inside...
are shielding, coaxial geometry, and twisted-pair geometry. Shielding makes use of the electrical principle of the Faraday cage. The cable is encased for...
radio frequency connector used for coaxialcable. It is designed to maintain the same characteristic impedance of the cable, with 50 ohm and 75 ohm types being...
transmission line include parallel line (ladder line, twisted pair), coaxialcable, and planar transmission lines such as stripline and microstrip. The...
inductance of the coax; that energy is proportional to the cable's measured inductance. The magnetic field inside a coaxialcable can be divided into...
Ethernet, thinnet, and thinwire) is a variant of Ethernet that uses thin coaxialcable terminated with BNC connectors to build a local area network. During...
copper wire and cable in them, it was possible to replace those big cables with much smaller coaxialcable. The next major use of coax in telecommunications...
made using coaxialcable near to the feed point of a balanced antenna, then the RF current that flows on the outer surface of the coaxialcable can be attenuated...
television receivers. Alternatively television signals are distributed by coaxialcable or optical fiber, satellite systems and, since the 2000s via the Internet...
signals in coaxialcables again using transmitter and receiver modules, and the cable modem termination system (CMTS) connects to these coaxialcables. An example...
connectors are semi-precision coaxial RF connectors developed in the 1960s as a minimal connector interface for coaxialcable with a screw-type coupling...
RF connectors are typically used with coaxialcables and are designed to maintain the shielding that the coaxial design offers. Better models also minimize...
radiate: something that coaxialcable is not generally supposed to do. A leaky feeder communication system consists of a cable run along tunnels which...
initially carrying 36 telephone channels. In the 1960s, transoceanic cables were coaxialcables that transmitted frequency-multiplexed voiceband signals. A high-voltage...
a coaxial RF connector commonly used for "over the air" terrestrial television, cable television and universally for satellite television and cable modems...
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