Detailed explanation of the shielding structure of extremely fine coaxial beam: how to make the signal more stable?

In high-frequency and high-speed electronic equipment and precision applications, extremely thin coaxial cables (Micro Coaxial Cable) have become an indispensable signal transmission component in intelligent devices, communication terminals, and industrial modules due to their small diameter, high flexibility, and excellent electrical performance. To ensure signal stability in complex electromagnetic environments, the design of the shielding layer is crucial. This article will deeply analyze the shielding layer design logic of extremely thin coaxial cable bundles from two aspects: the type of shielding structure and the core mechanism.

One, common structural forms of shielding layers
Weave a shielding layer
The outer layer of the cable is covered with a metal wire interlaced weaving, which takes into account both good mechanical strength and flexibility. The woven shielding can effectively reduce external electromagnetic interference (EMI) and maintain a stable structural shape in bending environments, making it one of the most common shielding methods.
Copper foil shielding layer
Copper foil shielding layer is renowned for its high coverage rate, almost seamless, and can achieve extremely high shielding efficiency. It is particularly suitable for high-precision signal transmission or applications with stringent requirements for electromagnetic interference suppression, such as high-frequency communication and medical imaging equipment.
Weaving + Copper Foil Composite Shielding
The design that combines weaving layers with copper foil layers has the dual advantages of flexibility and high shielding efficiency. It can ensure good mechanical stability while comprehensively suppressing electromagnetic wave leakage, and is widely used in the structure of high-end electronic systems at present.
4. Multilayer shielding structure
For applications requiring ultra-high-speed or sensitive signal transmission, double-layer weaving or weaving + multi-layer foil structures can also be used. Multi-layer shielding can significantly improve the anti-interference capability, reduce the signal leakage rate to an extremely low level, and ensure the electromagnetic compatibility and signal integrity of the system operation.
The core function of the shielding layer
Resist external interference (EMI suppression)
The shielding layer can effectively block external electromagnetic waves from entering the signal channel, preventing noise coupling from affecting the signal quality. This is a key foundation for the stable operation of systems that need to maintain high signal purity.
Prevent internal signal leakage
High-frequency signals also generate radiation. A reasonable shielding structure can prevent signal leakage outward, thereby ensuring electromagnetic compatibility (EMC) between devices and reducing crosstalk issues.
Enhance the mechanical protection of cables
In addition to electrical functions, the shielding layer can enhance the overall mechanical strength of the cable. To a certain extent, it can resist bending, friction, and external pulling forces, thereby extending the service life of the cable bundle.
Ensure high-frequency signal transmission quality
In transmission environments at 6GHz and even higher frequencies, the design of the shielding layer directly affects the signal attenuation and crosstalk levels. High-quality shielding not only ensures signal integrity but also reduces the system error rate and improves communication stability.

The shielding layer of extremely thin coaxial cable bundles is not only outer protection but also the core guarantee for signal integrity and system anti-interference capability. From weaving, copper foil to multi-layer composite, each shielding structure has its unique advantages. Engineers can flexibly choose the shielding scheme according to actual application needs to achieve the best balance between performance and reliability.
I amSuzhou Huichengyuan Electronics,Long-term focused on the design and customization of high-speed signal cable harnesses and ultra-fine coaxial cable harnesses, committed to providing customers with stable and reliable high-speed interconnection solutions. If you have related needs or want to learn more, please contact:Manager Zhang 18913228573 (WeChat same number)。