As electronic products develop towards being slim and compact, Micro Coaxial Cable (极细同轴线束) boasts excellent electrical performance and flexible structure, and is widely used in high-end display equipment, medical devices, portable terminals, and aerospace and aviation fields with high precision. So, how is this micro coaxial cable constructed? And what are the key functions of each part? This article will detail it for you.
What is a micro coaxial cable?
Extremely fine coaxial cable, known as Micro Coaxial Cable in English, is a coaxial cable structure with an extremely small diameter (usually between 0.2mm and 1.0mm). It is sequentially composed of conductor, insulating layer, shielding layer, and jacket layer from inside to outside, and has excellent anti-interference capability and high-frequency transmission performance, making it very suitable for applications with small size, light weight, and high-speed signal transmission.
Structure Details of Ultra-Fine Coaxial Beam
Conductor
Conductors are the core signal transmission part of cables, common types include:
Silver-plated copper wire
Gold-plated copper wire
Super-fine bare copper wire
The conductor diameter of extremely fine coaxial cable bundles is very small, commonly available specifications are AWG36~AWG50. The material and coating of the conductor directly affect the quality of signal transmission and the overall electrical performance.
Insulation layer
Insulation sheath is wrapped around the conductor and its main functions include:
Prevent conductor short-circuit
Maintain coaxial structural geometric stability
Ensure the characteristic impedance consistency for high-frequency signal transmission
Common materials:
FEP (fluorinated ethylene propylene)
PFA (perfluoroalkoxy vinyl)
Polyethylene (PE)
These materials have high heat resistance, low dielectric constant, and good flexibility, and can adapt to complex bending and high-frequency signal environments.
3. Shield layer
The main function of the shielding layer:
Suppress external electromagnetic interference (EMI)
Prevent signal leakage and protect surrounding equipment from interference
Common structures:
Tinned copper wire braiding
Silver plated copper wire braiding
Aluminum foil + woven double shielding
The weaving density of extremely fine coaxial cable bundles typically reaches above 90% to ensure good EMC performance in high-frequency environments.
4. Jacket layer
The sheath layer is the outermost layer, its functions include:
Protect the internal structure from mechanical damage
Abrasion-resistant, oil-proof, waterproof, and chemical corrosion-resistant
Common materials:
TPU (Thermoplastic Polyurethane Elastomer)
• PVC (polyvinyl chloride)
• PE
Select the jacket material based on the application environment to ensure the harness operates stably for a long time.
Typical applications of ultra-fine coaxial fiber bundles
Internal wiring of smartphone, tablet computer, notebook display
Camera module internal wiring
Medical endoscope, surgical robot signal line
Aerospace communication and navigation cables
High-end vehicle radar and camera system
With miniaturization, high-speed transmission, and excellent anti-interference performance, ultra-fine coaxial cable束 has become an indispensable wiring solution for high-end electronic equipment. The conductor, insulation layer, shielding layer, and sheath layer each perform their respective functions, working together to ensure stable signal transmission. As the development of industries such as 5G, AR/VR, medical, and unmanned driving continues, the application scenarios of Micro Coaxial Cable will become more extensive.
We have been focusing on the design and customization of high-speed signal cables and ultra-fine coaxial cables for a long time, committed to providing stable and reliable high-speed interconnect solutions. If you have any related needs or want to learn more, please contact: Manager Zhang.
18913228573 (WeChat number)。
