The influence of the weaving density and material of the shielding layer of shielded cables on the shielding effect

shielded cableIt is a common power transmission and signal transmission line, and the weaving density and material of its shielding layer have a significant impact on the shielding effect. This article will explore the impact of these two factors on the shielding effect from different perspectives, and demonstrate it through examples and cited data.

1、 The influence of weaving density on shielding effect

The shielding effect increases with the increase of weaving density

Weaving density refers to the spacing between the braided wires in the shielding layer. Generally speaking, the higher the weaving density, the better the shielding effect. This is because high-density weaving can better block external electromagnetic interference, making internal signal transmission more stable. For example, the sameShielding materialUnder the same structure, the shielding effect of a cable with a weaving density of 100 per inch is better than that of a cable with a weaving density of 50 per inch.

2. The shielding effect of weaving density varies for different frequency bands

The impact of weaving density on shielding effectiveness varies under electromagnetic interference in different frequency bands. The electromagnetic interference in the lower frequency band mainly affects the shielding layer through reflection, and the improvement effect of high weaving density on the shielding effect is more obvious at this time. Under higher frequency electromagnetic interference, electromagnetic waves can pass through the gaps of the woven layer, so the shielding effect depends more on the conductivity and impedance matching of the woven material.

2、 The influence of material on shielding effect

The influence of the conductivity of the woven layer material on the shielding effect

The conductivity of the woven layer has a significant impact on the shielding effect. Generally speaking, materials with good conductivity can better absorb and disperse external electromagnetic interference, thereby improving shielding effectiveness. Common braided layer materials include copper wire, aluminum wire, etc. Among them, copper wire is widely used in shielded cables due to its excellent conductivity.

2. The influence of the magnetic permeability of the woven layer material on the shielding effect

The magnetic permeability of the woven layer material also has a certain impact on the shielding effect. Materials with higher magnetic permeability can better absorb magnetic field energy, thereby improving shielding effectiveness. For example, using copper iron alloy as the braided layer material can significantly improve the shielding effect of cables against magnetic field interference.

3. Comprehensive consideration of weaving layer material and conductivity

When selecting the material for the weaving layer, it is necessary to comprehensively consider factors such as its conductivity, magnetic permeability, and cost. If only considering copper wires with excellent conductivity, although the shielding effect will be good, the cost will also be relatively high. Therefore, in practical applications, suitable weaving layer materials can be selected based on specific needs and economic factors.

conclusion

shielded cableThe influence of the weaving density and material of the shielding layer on the shielding effect cannot be ignored. By increasing the weaving density and selecting appropriate weaving layer materials, the shielding effect of cables can be effectively improved, ensuring the stability and reliability of signal transmission. However, in practical applications, it is necessary to comprehensively consider the specific situation and select the most suitable shielded cable. Only by fully understanding the influence of weaving density and material on shielding effect can we better meet the needs of various applications.