RG11 coaxial cables are often used for high-frequency applications such as cable television (CATV) distribution, broadband internet, and satellite communication. They typically have a copper-clad steel center conductor, a dielectric insulator, a braided copper shield, and a PVC or PE outer sheath. The center conductor and shield are designed to maintain a constant impedance of 75 ohms, which is the standard impedance used in CATV and other high-frequency applications.

One of the main advantages of RG11 coaxial cables is their low signal attenuation, which means that the signal can travel over long distances without losing strength. RG11 coaxial cables also have higher power handling capacity than other coaxial cables, which makes them suitable for use in high-power applications.