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What is a Coaxial Cable?

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What is a Coaxial Cable?

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A coaxial cable is a specific type of cable that consists of four layers of material. There is an inner conductor, a dielectric insulating layer, another conductive layer, and an insulating layer. The cable is called coaxial because both the inner and outer conductive layers are on the same geometric axis. A geometric axis is a line passing through the length of the material. These cables are designed to be used for radio frequency transmissions. The purpose of the multiple layers is to restrict the electromagnetic field generated by the signal to interior of the cable itself. Using this development, the amount of electromagnetic interference through the cable is reduced. The inner conductor can be either solid or stranded in design. Stranded is the preferred wire type, due to its greater degree of flexibility. An option to improve performance is to purchase a coaxial cable with a silver plated inner conductor. The other option is a copper-plated iron wire. The next layer is insulation

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Coaxial cable, also called coax, is used to transmit radio frequency (RF) signals. It has low emission losses and provides protection from electromagnetic interference, allowing signals with low power to be transmitted over longer distances. Coaxial cable is comprised of an inner core, insulator, shield, and outer cover. It is called coaxial because these sections all share the same axis. There are many different types of coaxial cable, each one with different physical and electronic properties designed for specific tasks. It is commonly used for carrying cable television signals along suburban streets and into homes.

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Coaxial cables are a type of cable that is used by cable TV and that is common for data communications. Taking a a round cross-section of the cable, one would find a single center solid wire symmetrically surrounded by a braided or foil conductor. Between the center wire and foil is a insulating dialectric. This dialectric has a large affect on the fundamental characteristics of the cable. In this lab, we show the how the permittivity and permeability of the dialectric contributes to the cable’s inductance and capacitance. Also, these values affect how quickly electrical data is travels through the wire.

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Coaxial cable is called “coaxial” because it includes one physical channel that carries the signal surrounded by another concentric physical channel, both running along the same axis. The two channels are seperated by a layer of insulation and there is additional insulation around the outer concentric physical layer What is Quad Shield Cable? Most commonly found in broadband (CATV) cable, quad shields are multiple layers of foil/braid/foil/braid. This construction gives excellent shield protection and also allows the use of water blocking gels and other methods to weather-proof cables.

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