Around the globe, coaxial cables are used to transmit a wide frequency spectrum. Consumers of coaxial cables use them to establish cable tv or internet connection, to assemble a surveillance camera or CCTV camera connection, and many other networking systems. The heavily insulated and well-shielded design of the coaxial cable is credited for good quality signal transmission for a relatively shorter distance. For longer distances, coaxial cables are not an ideal candidate as they may experience interference and signal loss resulting in poor output.
Design
While coaxial cables are specifically designed to meet a certain application, intending certain advantages while compromising on other limitations, all types of coaxial cables have the same basic design made of three components, conductor, insulation, and shielding. All the layers of coaxial cables share the same axis, hence the name coaxial. Different layers can vary in the material used and thickness.
Impedance
The amount of resistance offered by cable to the flow of electric current is called impedance and it is measured in the units of Ohm
Coaxial Cables are most frequently divided on the basis of their impedance.
- 50 Ohm has its application in data and wireless communication i.e, two-way communication systems, RF & Microwave transmissions, data transmission, and M&C applications.
- 75 Ohm is mostly used for video signal transmission.
Different Types of Coaxial Cables
Most coaxial cables are given named prefixed by RG or RF. Historically, RG referred to military specification “Radio Guide”, but now it is just genetically used as a prefix to the number assigned to a specific type of cable. The most frequently used coaxial cable types are RG-6, RG-59, and RG-11.
RG-6 are overall thin but have larger conductors for better signal transmission and thicker dielectric insulation for more effective transmission of GHz signals.
RG-59 are thin and have a thinner central conductor. They are mostly preferred for domestic applications as they are perfect for going through the walls and ceilings due to their smaller diameter.
RG-11 is thicker so it offers lower attenuation levels, which means it is more suitable for transmission over longer distances.
How to identify Coaxial Cable Type
Are you trying to fix or assemble a coaxial cable connection? If the coaxial cable is damaged or you need to add length to the coaxial cable or split the connection using a splitter, you will need to buy more coaxial cable. For that purpose you will need to identify the coaxial cable, so you can purchase the right type. Since different coaxial cables come in different sizes, you will need to know the coaxial cable type if you need to replace the connector or insert a splitter. There are different types of coaxial connectors and splitters available in the market, that are suitable for different cables and applications. Most Coaxial cable jackets have the cable type printed, embossed or stamped on their outside. You can also identify the type of coaxial cable by taking into account the application or device it was used for or by identifying the type of connector used. If in doubt you can bring the cable to us and we can identify the cable for you.
