koaxiális

Koaxiális refers to a coaxial cable, a type of electrical cable that consists of an inner conductor surrounded by an insulating layer, and then a braided metal shield. This construction provides excellent shielding against electromagnetic interference, making coaxial cables suitable for transmitting high-frequency signals.

The most common application of coaxial cables is in television broadcasting and cable television systems, where they are used to carry video and audio signals from the antenna or headend to the receiver. They are also used in computer networks, particularly in older Ethernet standards, and in radio frequency applications such as transmitting signals from antennas to radios and televisions.

The impedance of a coaxial cable is a critical factor in its performance. Common impedances are 50 ohms and 75 ohms. The choice of impedance depends on the application. For example, 50-ohm cables are typically used in data transmission and radio frequency applications, while 75-ohm cables are prevalent in video and audio applications.

Coaxial cables are known for their durability and reliability. However, they can be susceptible to signal loss over long distances, which can be mitigated by using thicker cables or signal boosters. The connectors used with coaxial cables, such as BNC and F-connectors, are designed to ensure a secure and reliable connection, maintaining signal integrity. The braided shield plays a crucial role in preventing external noise from interfering with the signal carried by the inner conductor.