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Coaxial Cable: Advantages & Disadvantages

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Coaxial Cable

A Coaxial Cable, also known as a Coax Cable, is an electrical cable that transmits signals from one point to another. They carry a high volume of digital data in the form of signals, and the chances of signal loss are almost zero. These cables are used to deliver video, voice communications, and data to clients, telephone companies, cable operators, and internet providers all around the world. It has also been globally applied within homes.


Structure of Coaxial Cable

Coaxial Cable are mainly built up of these four different layers:

Coaxial cables have a single copper or copper-coated steel wire at their core. It is responsible for carrying RF signals. The wire is encased in a dielectric insulator, which is typically constructed of plastic. The distance between the center conductor and the following layer remains constant.

The insulator is encircled by the braided mesh, which is woven from copper, aluminum, or other metals. It removes electromagnetic interference from the outside. For added protection, some Coaxial Cable uses several shields in their construction. An external polymer layer, which has a plastic coating serves as the final layer of defense for the entire setup.


There are 3 different types of Coaxial Cable-

  • RG-6: It is suitable for HDTV (High Definition). It is used for drops under 150 feet. Larger conductors used in RG-6 coaxial cables are intended to improve signal quality and handle GHz-level transmissions more efficiently. They are constructed from thicker gauge wire with insulation and shielding calibrated for high-bandwidth, high-frequency transmissions seen in cable TV, satellite TV, and internet connections.
  • RG-11: This type of Cable is best for CCTV systems. It is used for longer drops due to the increased performance over lengths of more than 150 feet. The thickest form of Coaxial wire is called RG-11. When it comes to flexibility, it might be challenging to deal with. Although it does not have as much attenuation as RG-6 or RG-59, it is still perfect for applications that carry data over greater distances.
  • RG-59: It is ideal for TV, internet connections, and video signals. AWG wire in RG-59 cable is smaller and lighter. RG-59 has been around for a long time and was initially used for cable TV connections. Older residences and commercial office buildings tend to contain it. For signals with low bandwidth and low frequency under roughly 50 MHz, including analog video and CCTV installations, it is advised.
Types of Coaxial Cable


  1. This cable is easy to wire and install.
  2. Less affected by noise, cross-talk, or electromagnetic interference.
  3. These cables support high bandwidth.
  4. These cables support multiple channels.
  5. It provide better resistance to crushing and bending, so they are more reliable and durable.


  1. Coaxial cables are expensive for longer distances networks because of the installation thickness.
  2. These cables have multiple layers, which makes them bulky.
  3. Needs to be grounded to prevent interference.
  4. There is a risk of breaking the Coaxial Cable and attaching a “t-joint” by hackers, therefore, safety is an important concern.
  5. Cable failure can cause your entire network to go down.
Features of Coaxial Cable


In conclusion, Coaxial cables have long been a crucial component of the electronics sector. They provide a reliable method of transmitting high-frequency signals, which makes them perfect for use in telecommunications, data networking, and audio and video equipment. Application-specific uses exist for the two primary coaxial cable kinds, 75 Ohm and 50 Ohm. 75 Ohm cables are used for television signals, and 50 Ohm cables are utilized for data and wireless communications.

These cables provide benefits, but they also have drawbacks, like the requirement for grounding to prevent interference, bulkiness, and potential for cable failure. In conclusion, these cables are an essential component of contemporary electronic networking and communication, and selecting the appropriate Coaxial Cable for your application is essential for ensuring high-quality signal transmission.

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