Cable Popular Science Series--Definition and Function of Concentric Cables





Definition of the concentric cables

Concentric cables originated in the late 19th century. It is a cable consisting of more than two concentric arranged conductors, and is a composite cable. The conductor and the shield share the same axis.

Its inner neutral line is rotated around the conductor.

 

Knowledge of the Concentric cable         

Concentric cable is a type of communication cable. If classified from the use, it can be divided into two categories.

One is baseband concentric cable, and one is broadband concentric cable. The so-called broadband concentric cable is actually the combination of the network concentric cable and the video concentric cable.

The concentric cable will be more expensive, but he is more powerful, especially anti-interference.

If you need to communicate with a lot of capacity or want to link multiple devices, a concentric cable is your best choice.

                                     



Structure and working principle of the coaxial cable

Concentric cable structure

Concentric cable exterior has conductive shielding and other material layers (improve environmental performance).

Concentric cable is made of woven conductor strands and layered, which improves the flexibility of the coaxial cable and is reconfigurable. Make the cables overall lightweight and durable.

The core of the concentric cable is the concentricity of the cylindrical conductor inside it, and as long as the concentricity remains unchanged, the performance of the cable.

 

Coaxial cable working principle


The coaxial cable is based on its conductor having some important characteristics of relevant characteristics.

These properties determine its distinctive applications, namely skin depth and cutoff frequency.

The phenomenon of high frequency band signal when information spreads along the same axis is the so-called skin depth.

The cut-off frequency is the wavelength of the electromagnetic energy and the frequency generated is the cut-off frequency.

 

Use of the concentric cable

Concentric cable have reliable physical properties and can provide high-quality audio and video transmission.

It can also be subdivided into use: RG-58 and coarse cable RG-11 and semi-rigid coaxial cable


Thick cable

The RG-11 has a diameter of 1.27cm, with a maximum transmission distance of 500m

It is mainly used to connect the network of several thin cables.

 

Fine cable

Fine cable diameter is 0.26cm, with a maximum transmission distance of 185m

It is mainly used to erect a network with relatively concentrated terminal equipment.

 

Semi-rigid concentric cable

The scope of use is very small, large hardness, not easy to bend.

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