What is a coaxial cable?
Coaxial cable is a specific cable type that consists of four layers of material. There is an internal conductor, dielectric insulating layer, other conductive layer and insulating layer. The cable is called coaxial because both internal and outer conductive layers are on the same geometric axis. The geometric axis is a line passing through the length of the material.
These cables are designed to be used for frequency transmission. The purpose of multiple layers is to limit the electromagnetic field generated by the signal to the interior of the cable itself. This development reduces the amount of electromagnetic interference with the cable.
The internal conductor can be solid or stuck in design. Stuck is the preferred type of wire due to a greater degree of flexibility. The possibility of improving performance is to buy a coaxial cable with a silver internal conductor. The second option is a copper iron wire.
The more tdal layer is an insulation that can be made of foam plastic, air with spacers to retain the inner wire and prevent the h remTu, solid plastic or solid teflon®. Insulation of polyethylene is often used in low -electrical loss cables. The higher the quality of the isolation, the greater the cost.
In the standard coaxial cable, the shield consists of a copper conductor that is met to improve flexibility. Knit wire can be silver, two -layer or covered with foil to improve the shield performance. Depending on the desired signal shading level, the shield may be a fixed metal tube.
The risk of using this type of hard cable is the inability to accommodate sharp bends. Any turning point in the shield results in the loss of the signal in the cable. This type of installation is most often observed in cable television distribution systems due to their requirements.
The insulating jacket is often made of polyvinyl chloride (PVC), but can also be made of a wide range of materials. May include the actualSti resistance to fire, antioxidation or ultraviolet resistance to light. The type of insulation depends on installation and environment.
The materials used in the coaxial cable composition must comply with government regulations at an acceptable level of electromagnetic signal leakage. These signals disrupt a wide range of other signals. The type of insulation required to reduce the signal leak to zero is expensive and impractical. The cables created today are a combination of a function and are deigned to reduce the level of interference as much as possible without incurring disproportionate costs and creating impractical cable properties.