What are Coaxial Cables?
Coaxial cables are widely used for transmitting radio frequency (RF) signals in various applications, ranging from telecommunications and television broadcasting to computer networking and satellite communication. Their unique design and construction make them ideal for efficient signal transmission with minimal interference.
What are Coaxial Cables? Coaxial cables consist of a central conductor, surrounded by a dielectric insulating material, which, in turn, is enclosed by a metallic shield. This design provides excellent shielding from external electromagnetic interference and allows for the efficient propagation of RF signals.
Key Components of Coaxial Cables:
1. Central Conductor: The central conductor is typically made of copper or copper-clad steel and carries the electrical signal. It can either be stranded or a single solid wire. Its thickness and conductivity impact the cable's performance.
2. Dielectric Insulation: The dielectric material surrounds the central conductor, providing electrical insulation and support. It is usually made of materials like polyethylene or Teflon, which determine the cable's impedance and signal loss characteristics.
3. Shielding: The metallic shield surrounds the dielectric insulation and prevents the transmission of unwanted electromagnetic interference into or out of the cable. The shield is typically made of aluminum or copper and can be in the form of a braid, foil, or both.
4. Outer Jacket: The outermost layer of the coaxial cable is the protective jacket, which safeguards the cable against physical damage, moisture, and environmental factors. Common jacket materials include PVC (Polyvinyl Chloride) or polyethylene.
