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Coaxial Cable
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
Updated on: 19-Jun-2020
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