Coaxial Cable

Computer NetworkComputer EngineeringMCA

Coaxial cables, commonly called coax, are copper cables with metal shielding designed to provide immunity against noise and greater bandwidth. Coax can transmit signals over larger distances at a higher speed as compared to twisted pair cables.

Structure of Coaxial Cables

Coax has a central core of stiff copper conductor for transmitting signals.  This is covered by an insulating material. The insulator is encased by a closely woven braided metal outer conductor that acts as a shield against noise. The outer conductor is again enclosed by a plastic insulating cover. The structure is shown in the following figure −

Categories of Coaxial Cables

Coaxial cables are categorized into three types as per radio government (RG) ratings −

  • RG – 59: Has impedance of 75W and used in cable TV
  • RG – 58: Has impedance of 50W and used in thin Ethernet
  • RG – 11: Has impedance of 50W and used in thick Ethernet

Applications of Coaxial Cables

  • In analog telephone networks: A single coaxial network can carry about 10,000 voice signals.
  • In digital telephone networks: A coax has a data rate of 600 Mbps.
  • In cable TV networks
  • In traditional Ethernet LANs
  • In MANs
Published on 24-Jul-2018 06:17:30