As electronic products develop towards being thin, light, and compact, Micro Coaxial Cable (极细同轴线束) has been widely used in high-end display devices, medical equipment, portable terminals, and aerospace and aviation fields due to its excellent electrical performance and flexible structure. How is this micro coaxial cable constructed? And what are the key functions of each part? This article will provide a detailed dissection.
What is a micro coaxial cable束？
Extremely thin coaxial cable, known as Micro Coaxial Cable in English, is a coaxial structure cable with an extremely small diameter (usually between 0.2mm and 1.0mm). It is composed sequentially from the inside out of conductor, insulation layer, shielding layer, and sheath layer, featuring excellent anti-interference ability and high-frequency transmission performance. It is very suitable for applications with small size, light weight, and high-speed signal transmission.
Section 2: Detailed Structure 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 in specifications of AWG36~AWG50. The material and coating of the conductor directly affect the quality of signal transmission and the overall electrical performance.
Insulation Layer
The insulating layer covers 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, capable of adapting to complex bending and high-frequency signal environments.
3. Shield layer
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 bundles usually reaches over 90%, to ensure good EMC performance in high-frequency environments.
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 sheath material based on the application environment to ensure the long-term stable operation of the wire harness.
Typical applications of ultra-fine coaxial beam
Internal wiring of smartphone, tablet computer, notebook display
Camera module internal wiring
Medical endoscope, surgical robot signal cable
Aerospace communication and navigation cables
High-end vehicle radar and camera system
With miniaturization, high-speed transmission, and excellent anti-interference performance, extremely thin coaxial cables have become an indispensable wiring solution for high-end electronic equipment. The conductor, insulation layer, shielding layer, and jacket 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 for Micro Coaxial Cable will become more widespread.
We have been focusing on the design and customization of high-speed cable harnesses and ultra-thin coaxial cables for a long time, committed to providing stable and reliable high-speed interconnect solutions. If you have any related needs or would like to learn more, please contact: Manager Yin.
18913280527 (WeChat number)。
