![]() It also protects the signal from outside electromagnetic interference.Īs a result, signal can be carried over long distances with little interference or loss. The insulator keeps the signals from coming in contact with and canceling each other. How Does Coaxial Cable Work?Ĭoaxial cables transmit signals through the center wire and metal shield at the same time. Outdoor-rated cables need extra insulation and special jackets to protect the wires from sun and moisture. The final layer is a rubber wrapper or jacket that insulates the whole configuration. It cancels outside electromagnetic interference. The metal shield, made of woven copper, aluminum, or other metals, wraps around the insulator. It keeps a constant distance between the center conductor and the next layer. ![]() A dielectric insulator, often made of plastic, surrounds the wire. It’s what carries the high-frequency signals. Before we get into how coax cables work, you need to know how they’re constructed.Īs you can see from the above image, there are four main parts:Īt the core, coaxial cables consist of a single copper or copper-coated steel wire.
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