Shielded cable is a type of transmission line with a special structure
Definition and Structure of Shielded Cable
Shielded cable is a transmission line that uses a metal mesh braided layer or metal foil to wrap the signal line. This structure forms an electromagnetic isolation barrier, and the wrapped conductor is called a shielding layer, usually made of non-magnetic materials such as copper and aluminum, and has a very thin thickness.
Main function of shielded cable
Reduce electromagnetic interference:
Shielded cables effectively prevent external electromagnetic signals from interfering with internal signals through a shielding layer, ensuring signal stability and accuracy. In electronic devices and communication systems, this helps prevent signal distortion, noise, and data loss.
Improve electromagnetic compatibility:
Shielded cables improve the electromagnetic compatibility of the entire system by reducing the electromagnetic radiation generated by the cable itself and minimizing interference with other surrounding electronic devices.
Preventing signal leakage: The shielding layer of the shielded cable can prevent internal signal leakage, prevent sensitive information such as confidential data or confidential communication from being intercepted by external devices, and improve information security.
Enhance cable reliability:
Shielded cable provides additional protection and reduces the impact of external factors on the cable, such as electrostatic discharge, lightning strikes, etc. This helps to extend the service life of the cable and reduce maintenance costs.
Improving signal integrity: Shielded cables can reduce signal attenuation and reflection, improve signal quality and transmission speed. This is crucial for high-speed data transmission and applications that require high signal quality.
When should l use shielded cable?
Shielded cables should be prioritized for use in various scenarios due to their unique anti-interference and protective characteristics.
In the field of industrial automation:
There are a large number of sensors and controllers in industrial automation environments, which can generate electromagnetic interference and potentially cause instability in cable systems. The use of shielded cables can effectively avoid this electromagnetic interference and ensure the normal operation of the system.
In the field of electronic device manufacturing:
Shielded cables can be used inside electronic devices, such as computer motherboards and displays, to eliminate noise caused by electromagnetic interference and improve the transmission quality of video and audio signals.
In the field of communication:
Network equipment and devices in data centers are often affected by electromagnetic interference. Using shielded cables can improve the reliability and stability of the network, ensuring the quality and speed of information transmission.
Special environment:
In some special environments, such as thermal power plants, nuclear power plants, etc., high-voltage cables are required. These cables use shielding materials to protect the safety of the wires and operators.
Applications with strict requirements for signal transmission:
Applications such as audio transmission, video transmission, and data transmission have high requirements for signal integrity. Using shielded cables can reduce signal attenuation and reflection, improve signal quality and transmission speed.
Environment with external electromagnetic interference:
In environments with strong external electromagnetic interference, such as areas with frequent lightning strikes and strong electromagnetic radiation, using shielded cables can effectively protect internal signals from interference.
In situations where grounding protection is required:
When the cable core wire is damaged, the leaked current can flow into the grounding grid through the shielding layer, providing grounding protection. Therefore, in situations where grounding protection is required, shielded cables should also be given priority consideration.
