Shielding structure of extremely fine coaxial cable束 in medical equipment: differences between single-layer, double-layer, and triple-layer

In medical imaging systems, endoscopic equipment, and various monitoring instruments, extremely fine coaxial cables (micro coaxial cable) undertake critical tasks of high-frequency signal transmission. The medical environment demands extremely high requirements for signal integrity, interference resistance, and stability, therefore, the shielding structure is the core factor determining the performance of the cable. The number of different shielding layers has a significant impact on signal quality, flexibility, and cost, understanding their differences helps in selecting a more suitable cable solution.

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Basic structure of extremely fine coaxial cable束

Extremely fine coaxial cables are usually composed of a central conductor, insulation layer, shielding layer, and outer sheath, and possess characteristics such as small diameter, high flexibility, and easy wiring. In medical equipment, the design of the shielding layer is particularly important to ensure that high-speed signals are not interfered with. As the demand for resolution, high bandwidth, and extremely low error rates increases, the shielding structure of the cables also gradually evolves from single-layer to multi-layer to adapt to more stringent electromagnetic environments.

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Comparison and Application of Single-Layer and Double-Layer Shielding

Single-layer shielding usually adopts copper braided or metal foil structure, which has advantages such as low cost, good flexibility, and easy wiring, and is suitable for general medical equipment with weak interference environment. However, its coverage and anti-interference ability are limited, and there are deficiencies in high-frequency or complex electromagnetic scenarios.
The double屏蔽 structure is usually composed of a "foil + woven" combination, where the foil layer is mainly used to suppress high-frequency interference, and the woven layer enhances the overall shielding strength. This structure achieves a good balance between performance, flexibility, and cost, and is therefore widely used in endoscopes, high-resolution imaging systems, and high-speed sensor signal chains. It is the most commonly used shielding solution in the medical industry.

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The necessity of multi-layer shielding in high-end medical equipment

In some high-end medical equipment, such as high-energy treatment platforms, complex imaging links, or strong electromagnetic interference environments, a shielding structure of three layers or more is used. The alternating design of multi-layer foil and weaving can significantly improve the anti-interference capability, ensuring that the signal remains intact and stable under extreme conditions. Although multi-layer shielding reduces flexibility, increases cost and processing complexity, it is an indispensable high-level solution in scenarios with extremely strict requirements for signal quality.

The application of extremely fine coaxial cable束 in medical equipment varies with the shielding layers, from single-layer to double-layer and to three or more layers. Single-layer shielding is suitable for general signal environments; double-layer shielding balances performance and flexibility, being the mainstream choice for current medical equipment; multi-layer shielding provides ultimate signal protection for the most demanding medical systems. In actual design, the appropriate shielding structure should be selected in combination with the equipment's working frequency, installation environment, and overall EMC requirements to ensure the stability and reliability of signal transmission.

I am[Suzhou Huichengyuan Electronic Technology],Long-term focused on the design and customization of high-speed cable harnesses and ultra-fine coaxial cable harnesses, committed to providing customers with stable and reliable high-speed interconnect solutions. If you have related needs or want to learn more, please contact Manager Zhang:18913228573 (WeChat number)。