What is coaxial cable?

A coaxial cable is a cable that has an inner conductor surrounded by an insulating layer, surrounded by a conductive shield (outer conductor) and a protective outer jacket. The diagram below illustrates the structure of a typical cable. Electrical signals flow on the center conductor.

Center Conductor - Copper Clad Steel.

Center Conductor Bonding - Clean Release Polymer is used to stop moisture migration.

Dielectric - Polyethylene, closed cell foam with high VP provides mechanical stability.

The first outer conductor - an aluminum polymer aluminum tape firmly bonded to the dielectric.

Second Outer Conductor - 34 or 36 AWG Aluminum Braid

Third Outer Conductor - Additional aluminum polymer aluminum tape is used in triple and quad shield constructions to further enhance high frequency shield isolation before and after bending.

Fourth Outer Conductor (Optional) - Use additional 34 or 36 AWG aluminum braid in quad shield construction to further improve LF shield isolation in extreme RF noise environments.

Indoor and Overhead - A non-drip material designed to prevent corrosion of the metal parts of the cable.

Underground - A mobile compound that prevents moisture migration.

Corrosion protection agent

Jacket - UV stabilized outer jacket of polyethylene (PE) or flame retardant polyvinyl chloride (PVC) to protect the cores for the life of the cable.

Integral Messenger - A galvanized carbon steel wire support member that is attached to the cable with a detachable mesh.