Cable TV transmission Coaxial cable is the main medium for transmitting TV signals, which can simultaneously transmit multiple TV signals in one cable and is suitable for cable TV networks.
Telephone communication: Coaxial cables are used for long-distance telephone transmission and are an important component of long-distance telephone networks.
Computer network: In a local area network (LAN), coaxial cables are used to connect computer systems over short distances.

Surveillance system: Coaxial cables are commonly used to transmit video surveillance signals, especially in scenarios that require long-distance transmission of high-definition video signals.
Satellite communication: Coaxial cables are used to connect satellite antennas and ground equipment to ensure stable signal transmission.

Specific application scenarios

Video transmission: Coaxial cables are commonly used to transmit analog television signals and high-definition video signals, such as Standard Definition Television (SDTV) and High Definition Television (HDTV).
Data communication: In local area networks (LAN) and wide area networks (WAN), coaxial cables are used to transmit Ethernet signals and support high-speed data transmission.
Wireless communication: Coaxial cables are used to connect antennas and transmitters, ensuring the stability of wireless communication systems.
Audio transmission: In professional audio systems, coaxial cables are used to transmit high-quality audio signals.
Industrial and medical equipment connection: Coaxial cables are also used to connect industrial and medical equipment to ensure stable signal transmission.

Coaxial Cable Applications

Primarily, coaxial cables are used for the transmission of Radio Frequency energy where tight impedance and RFI/EMI control is required. This is particularly significant in 50- and 75-ohm RF and Microwave applications when signal loss and interference is detrimental to overall system performance. The common need in the Military/Aerospace market is for high performance cable assemblies that are electrically stable.

The following is a list of the most critical performance aspects when specifying a coaxial assembly

Insertion Loss
Measured in dB (decibels); increases as frequency increases.

VSWR
Voltage Standing Wave Ratio (VSWR)) is a ratio expressing how efficiently RF is transmitted from a source, through a transmission line and into a load. The ratio values increase with frequency.

Frequency
Measured in Hz (Hertz); the completion of one cycle of energy in the form of a wave. RF and Microwave frequencies range from High Frequency (HF) 3-30 MHz, Ultra-High Frequency (UHF) .3-3GHz, Super High Frequency (SHF) 3-30GHz to Extremely High Frequency (EHF) 30-300GHz.

Impedance
The measurement, in Ohms, of resistance to the flow of current.

Dielectric
An insulating material between the inner and outer a coaxial cable conductor that is a poor conductor of electricity. Includes materials ranging from air to PTFE (Polytetrafluorethylene) ETFE (Ethylenetetrafluoroethylene) and FEP (Fluorethylenepropylene).

Shielding
Foil or braid used as a conducting shield. Coax is supplied with varying amounts of shielding and shielding effectiveness. The amount of shielding required is determined by several factors: conductor diameter, flexibility or bend radius, and the specified electrical requirements.