Coaxial cable (coax) is a shielded electrical cable with an inner conductor, dielectric insulator, conductive shielding, and protective jacket, designed to transmit high-frequency signals with low interference. Common types include RG-6 (high bandwidth, long-distance) and RG-59 (low frequency, shorter, flexible). These cables are widely used for cable television (CATV), internet feeds, CCTV surveillance, and radio transmitters.
- Structure:Consists of a central conductor (copper or copper-clad steel) surrounded by a insulating layer, a conductive shield, and an outer protective jacket.
- RG6 Coaxial Cable:Commonly used for satellite television and high-speed cable internet, designed for higher bandwidth applications
- RG59 Coaxial Cable:Commonly used for CCTV surveillance systems and older audio/video equipment, featuring a smaller center conductor and less shielding than RG6.
- Performance:The shielding, which can be dual or quad-shielded, protects the internal signal from electromagnetic interference (EMI) and radio frequency interference (RFI).
Common Applications
- Cable TV & Internet:Connecting service provider lines to homes and modems.
- CCTV Surveillance:Transmitting video signals from cameras to recorders.
- Radio Broadcasting:Connecting transmitters to antennas.
- Signal Attenuation:Long cable lengths can lead to signal degradation; therefore, selecting the correct cable type (e.g., RG-6 for longer runs) is crucial for maintaining signal integrity.