Another advantage of coax cable construction is that enables high-frequency applications (50 MHz and higher). Thanks to such a great shielding and outer jacket, coax cables are less susceptible to electromagnetic and radio-frequency interference. The most important advantage comes from the specific design and construction of a coaxial cable. There must be a reason why coaxial cables are so commonly used, especially in radio communications, telecommunications, wi-fi systems, cable TV, and cable modems. What are The Advantages and Disadvantages of Coaxial Cables? Depending on the purpose, the jacket can also be made of some fire-resistant material, a material resistant to oxidation and ultra-violet light, or water-resistant material. The final layer is commonly known as the jacket, and it’s usually made of PVC ( Polyvinyl Chloride). Improved shielding prevents losses and improves performance, but it also makes the cable thicker and less flexible, which is not always desirable. Sometimes, there’re even four layers of shielding – two layers of aluminum foil and two layers of braided copper wire. Higher-quality cables may have two shields – aluminum foil combined with a braided copper wire. In some cases, it’s a silver-plated braid. In most cases, braided copper wire is used for the shield. This insulator can be made of solid plastic, or foam plastic, or air with spacers. The core conductor is surrounded by a dielectric insulator. Copper-plated steel and stranded copper are also commonly used.
Those four elements are:Ĭopper is usually used for the core. Their thickness and color may vary, and their structure may be more or less complex, but every coaxial cable has 4 key elements. What Does It Look Like?Ĭoaxial cables have a simple cylindrical shape. Since the beginning of the 20 th century, and especially since the introduction of television, it’s one of the most common cables in every household. The cable was first used in 1858, but it was patented 22 years later, in 1880. The term ‘coaxial’ refers to the construction of the cable – this term is used because the core of the cable (the inner conductor) and the woven shielding (usually made of copper) share the same axis (they are coaxial). The radiofrequency range (RF range) spans from the upper end of the audio spectrum to the lower end of the infrared spectrum (from 20kHz to 300GHz).
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