Coaxial cables are a type of electrical cable consisting of an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield. Often used for carrying signals for cable television, they are also used in computer networks, data transmission, and other forms of communication.

The inner conductor is typically made of copper wire, while the tubular insulating layer is made of a material such as polyethylene or polyvinyl chloride. The outer shield is composed of braided strands of copper, which provide a low-resistance path to ground. The shield helps to minimize interference from outside sources, such as radio frequencies and electromagnetic fields.

Due to the shielding, coaxial cables are capable of carrying high-frequency signals with minimal signal loss. This makes them ideal for transmitting data over long distances, as well as for transmitting video signals. They are also relatively inexpensive compared to other types of cables, making them a popular choice for home networks and other applications.

Coaxial cables are highly durable and resistant to damage, as the shield helps to protect the inner conductor from physical damage. They also have a low susceptibility to electromagnetic interference, making them a good choice for applications that require high levels of signal integrity.

Overall, coaxial cables are a reliable, cost-effective choice for many different types of applications. From home networks to cable television, they are trusted for their ability to deliver a reliable signal over long distances. With their durable construction and low susceptibility to interference, they are sure to remain a popular choice for years to come.