Coaxial Cable: An Introduction

Coaxial cable also referred to as a coax cable, is an electric cable that helps transmit radio frequencies (RF) from one point to the other.

Introduced first in the early 20th century, coaxial cables were primarily used for connecting satellite antenna facilities to homes and businesses thanks to their durable nature and ease of installation.

In the following article, we will discuss all about coaxial cables, their types, and how they are used. Let us start with the types of RG cables.

What is RG cable?

What is RG cable

Coaxial cables come in different shapes and sizes, and they all vary by their gauge points and resistance to electrical current. Gauge refers to the thickness of the cable and is measured by a radio guide measurement or RG number. The higher the RG, the thinner the central conductor cord is.

What does a Coaxial Cable look like?

Coaxial Cable

Coaxial cables are identified by their thickness and round shape, which is primarily due to their interior insulation layer. This makes the cable look very different from other types of cables which is why they differ from twisted pair and Ethernet cables. The most common sizes in coaxial cables come in the RG-6, RG-11, and RG-59 categories. They are differentiated on the basis of their sizes. They differ in terms of color, which come in black, white, and brown.

How do Coaxial Cables work?

Their shielded design allows for the central conductor to transmit data quickly. This is why coaxial cables are popular. They protect from damages and interference during data transmission.

Coaxial cables are built on four layers; they are as follows:

  1. A central conductor, which consists of copper. The conductor is the point at which data travels.
  2. Dielectric plastic insulation around the copper conductor.
  3. A braided mesh of copper which helps to shield from electromagnetic interference (EMI).
  4. An external layer, which has a plastic coating. It is used to protect internal layers from damages.

The central conductor carries data through the wire. The surrounding layers are for insulation purposes and stop any sort of signal loss, which helps to reduce Electromagnetic Interference (EMI).  The dielectric layer is set between the core and the outer layers, providing insulation.

The next layer, also known as the shield, protects from electrical impulses and keeps radio transmissions out. The combined purpose of the layers is to provide an uninterruptible signal transmission.

What is the transmission speed of Coaxial Cable?

The transmission speed of coaxial cables is 10Mbps, and they offer 80 times more transmission than twisted cables.

Coaxial cable advantages and disadvantages

Coaxial cables, like every other piece of technology, have their own set of advantages and disadvantages in usage. Listed here are some of them:

Advantages:

  • Durability
  • Reasonable price
  • Simple wiring and installation process
  • Expansion is easy
  • EMI resistance
  • 10Mb transfer capacity

Another good benefit of coaxial cables is that the electromagnetic signals are transmitted only inside the conductor. Because of this, coaxial cables can easily be installed next to metallic objects without loss of power, unlike other types of transmission lines.

Disadvantages of coaxial cable

The main disadvantage of using coaxial cables arises due to their dependent nature. A single cable failure can take down an entire network.

Coaxial cable types

coaxial cables

Coaxial cables are categorized into two types. The first type has an impedance of 75 Ohm’s and the other have an impedance of 50 Ohm. The ones with 75 Ohm are used mostly for video signals, while 50 Ohm cables are used for other data and wireless communications. Ohm refers to the measure of impedance, which is the resistance in the cable from the flow of electrical energy.

What’s RG coaxial cable?

Coaxial cable

RG or radio guide coaxial cable is a common cable type used for residential and commercial purposes. It has the following types:

What’s RG-6 cable?

These types of cables have larger conductors, which is why they provide better quality signals. Their dielectric insulations are thicker, with a different type of shielding. This makes them handle GHz signals more effectively. This type of cable is overall thin, which means that it can be installed easily in the walls or ceilings.

What’s RG-59 cable?

RG-59 is a common cable used in domestic settings. It is very similar to the RG-6 cable, but it has a thinner central conductor. For low-frequency transmissions, they are a good choice.

What’s RG-11 cable?

The RG-11 is comparatively thicker than other types of cables, which does not make it ideal for household cabling. However, because of its thick design, it offers lower attenuation levels than RG-6 or RG-59, making it suitable to carry data for longer distances.

What’s RF coaxial cable?

RFC195 Coax Cable

RF cables are used for the transmission of radio frequencies. Here are some commonly used industrial cables. The following list aims to explain the key features and uses of the industrial cables.

RFC100A Coax Cable

The RFC100A uses the same connectors as the RG-316 and RG-174. It is ideal for setting up jumper assemblies for wireless communications. Its various applications include mobile antennas, GPS, WLAN, WiMax connections, and many more.

RFC195 Coax Cable

The RFC195 is a universal coax cable, using the same connectors as the RG-58/142,400, and 223. Similar to the 100A, it is ideal for jumper assemblies. Its other features include GPS, Mobile Antennas, WLL, WLAN, and WiMax.

RFC240FR Coax Cable

The RFC240FR cables have similar connectors as the RG8x. The primary benefit of using this cable is because it is fire resistant, and ideal for use in jumper assemblies. Most popular applications include GPS, WLL, WLAN, LMR, WISP, SCADA, and WiMax.

RFC240UF Coax Cable

RFC240UF also has the same connectors as the RG8x and is designed for applications where speed and flexibility are required. Applications for the RFC240UF include Mobile Antennas, GPS, LMR, WISP, and WiMax.

RFC400 Coax Cable

RFC400 has similar connectors as the RG213 and RG8U. Best used for jumper assemblies, it is used for jumper assemblies in Wireless Communications. Other applications include Mobile Antennas, GPS, WLL, WLAN, WISP, and SCADA.

 RFC400DB Coax Cable

The RFC400DB is an advanced version of the RFC400. The DB in this version stands for Direct Burial, which is ideal when you want to set up jumper assemblies in wireless systems. Its best applications are with GPS, WLL, WLAN, LMR, WISP, SCADA, and WiMax.

RFC400FR Coax Cable

The RFC400FR is the fire resistant version of the RFC400 model. Again, it is ideal for Wireless Communication Systems. It is used in applications like GPS, WLL, WLAN, LMR, and WiMax.

RFC1807A Coax Cable

The RFC1807A is a generic coaxial cable. It provides good support for jumper assemblies and is used popularly for GPS, WLL, Mobile Antennas, WLAN, and WISP.

RG58C/U Coax Cable

The RG58C provides a flexible communication cable that runs at 50 Ohm. The copper stranding wires are 0.18mm that is 19 Tinned. Moreover, its Polyethylene covering of 2.95mm provides solid dielectric insulation. Plus, it has a 4.95mm PVC jacket with a 90% silver-plated copper braid.

RG142 Coax Cable

The RG142 is similar to the RG58C with only a slight difference of having a 95% silver-plated copper braid.

RG174A/U Coax Cable

The RG174A/U coaxial cable provides a flexible mode of communication that transfers signals at 50 Ohm. With 0.16mm/7 Tinned copper braid wires, combined with an 85% tinned copper braid, you will benefit a lot from this product.

RG213U Coax Cable

The RG213U coaxial cable has the same communication cable impedance of 50 Ohm. It also has 0.75mm/7 bare copper wire braids. Moreover, it has a 95% bare copper braid with a 10.20mm PVC jacket.

RG223 Coax Cable

This cable is one you need to look out for. It provides a communication cable at 50 Ohm, combined with a 0.90mm/112-128 silver plated bare copper wires. Moreover, it has a 90-95% silver-plated copper braid with a 5.30mm PVC jacket.

What is a coaxial Splitter?

coaxial splitter

When coaxial cables lines are set-up, they produce end-to-end signal transfer. Such a singularity is a drawback in the use of coaxial cables. For that reason, the coaxial splitter is used.

Coaxial splitters are used when there is a need to transfer through one or more devices that require a signal. For example, if you have two TV’s in your home, you can use a coaxial splitter to transfer a single cable signal into two devices.

What are Coaxial Cables used for?

 

In this list, you will find different types of coaxial cables and the tasks that they can perform.

  • Television Sets

The RG-6 Coaxial cable for television sets is useful because it provides the best impedance (Ohm). We all know that poor quality television reception gets on our nerves, so it is best to choose the RG-6 cables so that you can get the best possible cable reception.

  • HDTV

The RG-11 is more suited towards HDTV sets. Because of its higher gauge, it provides more space for signal transmission. Since HD requires a stronger signal speed, the RG-11 is ideal for transferring such signals.

  • Internet

Coaxial cables are also used to transfer signals for internet connections. Internet signals run at higher speeds than traditional analog videos. The RG-6 cable is designed for the transmission of internet signals.

It has a larger conductor, which provides high-quality signal transmission. The dielectric insulation is also thicker. RG-6 cables are built with a different form of shielding, which makes it the ideal cable for carrying GHz signals more effectively.

  • CCTV Cameras

RG-59 is best for transferring video signals through CCTV cameras. However, RG-6 can also be used because it can run at longer distances and does not hinder video signals. It is thick, firm, and very convenient to work with.

  • Video

For video signals, RG-59 and RG-6 are ideal. With industry standards, the RG-59 is most commonly used, but RG-6 is better at transferring digital video signals.

Conclusion

In this article, we talked about coaxial cables, and everything related to them. We talked about the sizes and the shapes they come in and their uses in various household and industrial appliances. We hope you found this article to your liking.

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