What are the signaling advantages of very fine coaxial cables? Why use soldered connectors?

In the LVDS wiring harness industry, as long as the wiring harness with high requirements for high-definition signal transmission and shielding effect is involved, the very thin coaxial line is basically used. The HotBar equipment is used for welding processing, and the connectors at both ends are basically welded connectors. What are the advantages of using the very thin coaxial line? Signal transfer characteristics are affected by several parameters, including, for example, impedance, insertion loss, return loss, and crosstalk. The following are some of the main reasons why very thin coaxial lines are generally considered to have signal transmission advantages when transmitting signals at high speeds. Reduce return loss: The center conductor, insulator and outer conductor of the very thin coaxial line are properly matched, and the performance is stable under a specific impedance. The matched and stable impedance results in low return loss. Reduced Insertion Loss: Compared to FPC/FFC, very thin coaxial lines can guarantee a larger central conductor cross-sectional area when matched to a specific impedance, thereby minimizing insertion loss. Improved shielding performance: The outer conductor acts as an electromagnetic shield, so the electrical signal transmitted on the center conductor is less susceptible to electromagnetic waves (electromagnetic noise) from the outside. In addition, the shielding effect of the outer conductor helps to reduce crosstalk between signals. Welded connectors have small pitch and precise structure, in which metal parts have good shielding effect to reduce signal interference factors, and can greatly improve transmission rate and high-definition signals by using the advantages of coaxial lines. At present, they are widely used in the field of liquid crystal display equipment. For example, 4K and 8K high-definition televisions, laptops, high-definition cameras, security monitors and so on are common around us.

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