Television channels broadcast their transmissions through radio frequency and this frequency is aired, caught by antennas and then transmitted to the television set through cables. The radiofrequency (RF) is basically the oscillation rate of an alternating electric signal carried through a wire. These cables are different from other wires as they are capable of transmitting radio frequencies/ microwave lengths and digital signals in the form of electric current.
What are rf cables?
RF cables are the type of coaxial cable which is used to transmit radio frequency signals. Meeting the diverse needs of military, business and telecommunication coaxial cable are able to offer diverse solutions. Coaxial cables are capable of transmitting data in the form of RF, microwave or digital signals.
What is the structure of coaxial cable?
They were designed to reduce the problem of electromagnetic interference faced by using a twisted pair of wires when they carry current. The term coaxial implies that all the layers of the cable share the same axis. In the centre is a single copper wire which is wrapped into an insulator (usually plastic). The next outer layer is metallic (aluminium usually) and it functions to block out electromagnetic interference (EMI) from outside. The outer most is a rubber coating also referred to as a protective jacket.
Designing of Coaxial Cabal
While the basic structure of coaxial cable remains same the design and material used can vary. This variation can alter the functionality and performance of the cable in the system and therefore its utility. Some cables may have bare copper conductor centre other may have copper-covered steel conductors at the centre. Similarly, this central conductor may be wrapped by a foamed or solid insulator. Another variation could be in the EMI insulating layer which could be an aluminium or copper foil or either braided aluminium sheet.
Functioning of coaxial cables
Coaxial cables serve different purposes depending upon their design and type. There are three basic types of coaxial cables. RF cables transmit radio signals and are mostly used in television sets and internet connections. The next is microwave coaxial cables which transmit micro-wavelengths and are used in microwave communication systems, airborne systems, satellite, cellular base stations, ground systems. The third type is used to make audio connections between a source such as a game console, DVD player, Blu-ray Disc player, and other components such as a receiver, amplifier, or speaker at home theatres. They are called digital coaxial cables and are great for sending digital signals from one component to another component even for a longer distance.
Why businesses prefer Coaxial cables?
Coaxial cables are better shielded and therefore offer significantly reduced crosstalk and other disruptions or leakages. Due to better shielding, they can safely carry signals for longer distance. They are more expensive in comparison to twisted wires but as they offer better quality and clarity for professional use, they are preferred by most businesses. With coaxial cables, you can protect the quality of the signal and send them to longer distance.