The Main Classification Of Coaxial Cables

Coaxial cables can be divided into two basic types, baseband coaxial and broadband coaxial.

Baseband coaxial cable
The shield of the baseband coaxial cable is usually a mesh structure made of copper with a characteristic impedance of 50 Ω. This cable is used to transmit digital signals, and the commonly used models are RG-8 (thick cable) and RG-58 (thin cable). The most intuitive difference between thick and thin cables is the different cable diameters. The thick cable is suitable for relatively large local networks, and its standard distance is long and the reliability is high, but the thick cable network must be equipped with transceiver and transceiver cables, and the installation difficulty is also large, so the overall cost is high. On the other hand, thin cables are simpler and less expensive, but because the cable has to be cut during installation, it is easy to have poor contact when there are many joints [5].
Whether a network is connected using thick or thin cables, the point of failure often affects all machines on the entire cable, and the diagnosis and repair of the fault is cumbersome. As a result, baseband coaxial cables have been gradually replaced by unshielded twisted pair or fiber optic cables.

Broadband coaxial cable
The shield of broadband coaxial cables is usually stamped with aluminum and has a characteristic impedance of 75 Ω. This cable is usually used to transmit analog signals, the common model is RG-59, and is a standard transmission cable used in cable television networks, which can transmit multiple TV signals simultaneously in a single cable. Broadband coaxial cables can also be used as a transmission medium for some computer networks.