What type of antenna cable is described as having a center conductor surrounded by a dielectric?

The type of antenna cable that features a center conductor surrounded by a dielectric is co-axial cable. Co-axial cables are designed with an inner conductor that transmits the signal and are insulated from the outer conductor by a dielectric material. This design helps prevent signal loss and interference by maintaining an effective shielding around the inner conductor.

In co-axial cables, the outer conductor is typically designed to act as a ground, thereby minimizing the external electromagnetic interference and maintaining signal integrity while transmitting high-frequency signals. The structure makes them ideal for various applications, including antenna connections in avionics systems where reliable signal transmission is critical.

Other options like tri-axial cables have an additional layer of insulation and conductors, flat ribbon cables consist of parallel conductors in a flat configuration useful for different applications, and fiber optic cables utilize light instead of electrical signals to transmit data, distinguishing them from the characteristics of co-axial cables.