Coaxial cable, also known as coax, is used to transmit radio frequency signals. It has lower emission losses and provides protection from electromagnetic interference, allowing signals with lower power to transmit over a longer distance. This cable is comprised of an inner core, insulator, shield and outer cover. Since all the sections share the same axis, it is called coaxial. This cable is commonly used for carrying cable television signals along suburban streets and into homes.
How is it made?
The inner core of a regular coaxial cable is made of solid copper between one and two millimetres thick. The dielectric insulator of this cable is either foam, solid plastic or an air gap created by plastic spacers. The shielding is made of copper braid and it surrounds the insulator layer. This kind of cable is usually braided so as to provide flexibility. A thin plastic layer protects the shielding.
Advantages of a coaxible cable
- Coaxial cable has a wider frequency range which allows the cable to carry multiple signals, making it ideal for carrying many cable television broadcasts.
- Each channel of this cable has a greater bandwidth which allows for high definition video.
- The shielding of this cable reduces interference, allowing for greater cable lengths between amplifiers.
Applications of coaxial cable
- It is used to carry television signals and connect video equipment together.
- It is also used to carry radio signals and connect the receiver, transmitter and antenna together.
- Short lengths of a coaxial cable are used for connecting devices with test equipment such as signal generators.
- Coaxial cable is also used to connect computers in local area networks. It is widely used in cable broadband.
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