A particular type of cable which is used to transmit radio, video and data frequencies is called coaxial cable. Invented in the year 1929 but it wasn’t till 1941 that it was implemented commercially. Its primary function was to strengthen particular type of signals for which it was used. The purpose of work also depended on the cable design as well.

 

The reason for it being called coaxial is due to the fact that the copper, the key cable responsible for carrying various forms of signals is enclosed within another type of physical concentric channel. Notable features of the cable are its insulation which is then covered with a shield made out net of aluminium.

 

The exterior portion of the cable is called the sheath. The main reason for this type of cable to be used is because exposed cable-line cannot be placed near metallic object or placed underneath the ground.

 

Usually the cables are distinguished by its impedance between the wire and the appliance. Different gadgets use different coaxial cable impedance. For instance, a 50 ohm wire is used in transmitting radio frequencies, a 60 ohm cable is used to transmit radio channels as well as antenna based gadgets.

 

However, this type of cable is no longer in use. Another is the 75 ohm wire-line, which is widely used for long distance networks and video signals. It is a standard cable which is recognized internationally. Lastly, there is the 93 ohm cable but it has completely phased out but earlier it was used for connecting between two computers. 

 

In addition to this, there are three typical forms of constructions for the cables. These are the braided or flexible cable, the ribbon cable and finally the semi-rigid cable. It is also said that longer the cable the more effective it is.

 

See also:

 

Shielded Twisted Pair Cables - Different Types of Cabling Used for Increased Bandwidth

Fibre Optic Cable - Simple Technology and Greater Bandwidth

Wireless LANs- Their Advantages and Disadvantages as Compared to Wired Networks

Introduction to Network Cabling: Cables for Computer Networking

Ethernet Cable Specifications for Maximizing Speed and Efficiency

Networking through Unshielded Twisted Pair (UTP) Cables