Coaxial CableCoaxial Cable is a communications cable that transfers high frequency signals with minimal loss, which makes them ideal for television connections. If you subscribe to cable television, you have coaxial cable connected to either the television or the cable box if you have one.
Coaxial cable is made of a center conductor, which is covered by a dielectric insulator, then another conductor (usually a thin metal braid) and finally a jacket. The jacket protects the entire cable from outside influences.
Wire conductors are what carry the signal from the source to the device and are typically made of aluminum or copper, depending on the application. They both conduct electricity, but copper is the better conductor whereas aluminum is lighter.
A dielectric insulator is like many other insulators in that it does not conduct electric currents itself; however, it must be able to sustain an electrical field. A dielectric could be air, gas, or plastic.
Coaxial cables do degrade over time, so they must be replaced to keep the consistency of the signal strong.