Coaxial Cables

Coaxial cables are cables that are used to transmit signals for radios, televisions, Internet connection, and calls. Most recommended cable for internet and hdtv are found at home where cable companies, telephone companies, and Internet providers set them up.

How do Coaxial Cables Work?

The coaxial cable transfers the signal it carries through the center core and other metal jacketing all at the same time because the two conductors generate a magnetic field. This isn’t a unique case as all electrically charged wires have the same function. However, the fields cancel out each other when the opposite charged magnetic fields collide. That is why cables are allowed to be put near any other electronic equipment and metallic objects without them performing like magnets. Another thing it does is prevent other external magnetic fields from changing the signal the cables carry with them.

What are the Parts of Coaxial Cable?

To further understand how coaxial cables work, here are the four parts of in a coaxial cable:

Center Core

The center core is the part of the coaxial cable that’s situated in the middle, hence the name. It is the most integral part of the cable as it is the one that carries the signal. There are two types of core: the core that is in high power or current application and core that is a single solid wire.

Dielectric Insulator

This is what separates the core from the shield. It’s also responsible for the unwavering impedance of the core between it and the shield. It oversees the frequency, controlling how of frequency can the core carry, which means that if the dielectric insulator is high, then the frequency is high as well.

Metallic Shield

As the name suggests, this is the part of the coaxial cable that prevents the signal from escaping. While it does that, it also stops unwanted external signals from disrupting the signal being carried by the center core.

Plastic Jacket

Much like a jacket, this part protects all of the coaxial cables, albeit not the same way metallic shield protects the signal in the center core. The plastic jacket protects the coaxial cable from the environment itself. Some come in a single layer, while others are thicker, having multiple layers, to better protect the cable.

Tips When Getting A Coaxial Cable

Know your Cable Size

There are various coaxial cables sizes, and they are not interchangeable so it would be wise to know what size of coaxial cable you need.

Determine the right connector

Like sizes, there are several types of coaxial cables, like F-type or N-type.

Types of Coaxial Cables

Hard Line Coaxial Cables – heavy duty coaxial cables to carry a stronger signal

Semi-Rigid Coaxial Cables –  for environments that will most likely damage the cable

RG-6 Coaxial Cables – most common coaxial cable that cable companies often use

Twin-Axial Cables  – paired cables that can substitute conventional coaxial cables

Tri-Axial Cables – stronger coaxial cable to shield off electromagnetic interference


If you’re planning on getting a coaxial cable without professional help, it is advisable that you read more about coaxial cables to understand how they work better and up the chances of getting and installing one right.

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