In today’s global age of technology, everything depends on the use of the internet. Whether you are trying to place an order on your favorite food delivery service application or business, try to reach out to clients for corporate orders.
As the global requirement for efficient, reliable, and fastest data transmission, the world quickly uses coaxial cables.
But have you ever wondered what coaxial cables are and how they are used? Well, Don’t worry. We will tell you exactly that in this article, so just continue reading till the end.
Coaxial cables are mostly used by cable operators, telephone companies, and internet service providers to transfer data, video, and voice communications to customers worldwide.
Coaxial cables started in the early 20th century and are preferred for reliable and accurate transmission. However, it has disadvantages that have caused it to be replaced by either fiber optic cable, category cable, or wireless signals.
Coaxial cable’s shielded design contributed immensely to its success. This design allows the cable’s copper core to transfer data fast, without surrendering to interference or damage from various environmental factors.
The coaxial cable’s inner conductor is surrounded by an insulating layer covered with conductive shielding. Some coaxial cables also have an insulating outer jacket.
The following diagram shows the construction of a typical coaxial cable.
- Center Conductor – Copper-clad steel
- Center Conductor Bond – Moisture migration blocked using clean stripping polymer.
- Dielectric – Stable, closed-cell foam with high VPN provided by Polyethylene
- First Outer Conductor – Protection shield with aluminum-polymer aluminum tape securely bonded to the dielectric core.
- Second Outer Conductor – Additional aluminum-polymer-aluminum tape further enhances HF shield isolation before and after flexure.
- Third Outer Conductor – Additional aluminum-polymer-aluminum tape is used in tri-shield and quad-shield constructions to further enhance HF shield isolation before and after flexure.
- Fourth Outer Conductor – Additional 34 or 36 AWG aluminum braid to further improve LF shield isolation in harsh RF noise environments.
- Corrosion-resistant protectant
(i) Indoor and aerial – a non-drip material developed to eradicate moisture migration into the cable construction.
(ii) Underground – a flowing compound capable of sealing small jacket ruptures.
- Jacket – a UV stable outer jacket of either polyethylene (PE) or flame retardant polyvinyl chloride (PVC) to protect the core during installation and for the life of the cable.
- Integral messenger – Carbon steel wire support member connected to the cable by a separable web.
How do Coaxial Cables work?
Coaxial cable’s center conductor ability to transmit data instantly while remaining safe from damage and interference has contributed to its popularity.
Coaxial cables carry the data in the center conductor, while the layers surrounding the conductor try to stop any signal loss or attenuation loss and reduce electromagnetic interference.
The first layer of the dielectric layer offers distance between the core conductor and the outer layers while providing some insulation.
The next layers, collectively called the shield, keep electrical impulses and radio transmissions out.
Coaxial Cables Types
There are two main types of coaxial cables. The first type has an impedance of 75 Ohm (Ω) and the second impedance of 50 Ohm. Impedance is the measure of resistance in the cable to the flow of electrical energy.
57 Ohm cables are usually used for transmitting video signals, while 50 Ohm cables are used for data and wireless communications.
Let’s look at some of the types of coaxial cables:
RG-6 Coaxial Cable
These cables have larger conductor’s dielectric insulation, and are made from a different kind of shielding material. They offer better signal quality and effectively handle GHZ level signals.
RG-59 Coaxial Cable
These cables have even thinner conductors than the RG-6 cables and are perfect for short and low-frequency transmissions.
RG-11 Coaxial Cable
These cables are easily identifiable as they are thicker than other types of cables. It is ideal for transmitting data at longer distances since it has a lower attenuation level than RG-6 or RG-59
Coaxial Cables Uses
Usually, coaxial cables are used to transmit radio frequency signals.
Its other applications or uses include transmission lines connecting radio transmitters and receivers to their antennas, computer network connections, digital audio, and distribution of cable television signals.
Let’s look at some of the most common uses of coaxial cables and the type of coaxial cable used for them.
Coaxial cable for TV
A poor-quality coaxial cable can easily impact your TV reception, so you must select the best cable for this job.
For this purpose, the RG-6 coaxial cable of 75 Ohm is ideal at an affordable price as well.
Coaxial cable for HDTV (high-definition)
For high-definition TV broadcasts, the best coaxial cable is RG-11. It offers a higher gauge which offers more space for signals to transfers.
At a cost-effective coaxial cable price, RG-11 will deliver strong HD signals at high speeds for you.
Coaxial cable for the internet
Internet signals are transmitted and received at a higher frequency than traditional analog video.
RG-6 coaxial cable was developed to satisfy this requirement. Not only does it have a large conductor for better signal quality, but its dielectric insulation is also thicker.
These coaxial cables can also carry GHZ level signals more effectively as they are made with a different kind of shielding material.
Coaxial cable for CCTV
RG-6 can be used for longer distances than RG-59 without worrying about video signal loss, but it isn’t as convenient to work with since it is thicker.
One of the main advantages of using coaxial cable is that the electromagnetic field responsible for carrying the signal exists only in the space between the inner and outer conductors in an ideal coaxial cable.
This ability allows coaxial cables to be installed near metal objects without worrying about power losses. These cables also offer protection of signals from any external electromagnetic interference.
Coaxial Cable vs. Fiber Cable: Which is better?
While both of these types of cables can be used to transmit and receive video, audio, and another form of data, they offer distinct advantages and disadvantages.
Let’s break down the difference between these two types of cables based on reliability, speed, and cost.
Coaxial cable’s insulated structure protects it from most environmental factors, but it is still not immune to outages. Its ability to perform is also dependent on the volume of concurrent users.
Fiber cables are not sensitive to outages, and their overall performance isn’t affected by the number of concurrent users.
Coaxial cables’ uploading and downloading speeds aren’t similar. Even though these speeds are lower than fiber, they are adequate for smaller businesses.
Fiber cables offer symmetric speeds faster than coaxial cables, making them ideal for larger businesses with high volume usages.
Coaxial cables are easy to install, and their implementation is relatively cheap because it’s widely available. Various internet and television networks bundle services are also available to maximize your savings.
Fiber cables are expensive due to activation and installation fees. Since the installation process can be comprehensive, your other system and networks operations may be impacted.
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