Coaxial Cable
Coaxial cable is a kind of wire and signal transmission line,
generally made of four layers of materials: the innermost is a
conductive copper wire, the outside of the wire is surrounded by a
layer of plastic (used as an insulator and dielectric), and the
outside of the insulator is surrounded by a thin layer. Mesh
conductor (usually copper or alloy), and then the outermost layer
of insulating material is used as the outer skin of the conductor.
Application editor
In cable television transmission, coaxial cables are widely used in
medium and small transmission systems due to their low cost and
easy construction. Especially in the "last 1 kilometer"
transmission of the HFC (Hybrid Fiber-Coaxial) network, it cannot
be replaced by other cables. Many passive devices, active devices
and users need to be connected by cables, and all devices connected
with coaxial cables need to achieve impedance matching. If it does
not match, the signal will be reflected between the component and
the cable, which will increase the impact of noise and ghosting on
the transmitted image. The quality of cables of the same
specification produced by different manufacturers sold in the
market varies greatly. But as long as you choose the cables
produced by regular manufacturers (the price is high), the raw
materials, electrical performance and production process can be
guaranteed, and the quality is also trustworthy.
Advantages of Coaxial Cable
The advantage of coaxial cable is that it can support
high-bandwidth communications over relatively long lines without
repeaters