With the continuous trend towards thinning of devices such as 5G mobile phones, drones, vehicle-mounted high-definition cameras, and medical endoscopes, the performance requirements for internal cables are also increasing. Among these micro devices, a cable assembly that combines high-speed low-loss and strong anti-interference capabilities is gradually becoming the core—it is the Micro Coaxial Cable Assembly (极细同轴线缆组件). So, what principles does this type of micro cable assembly rely on to ensure high-speed and stable signal transmission? This article will provide a detailed analysis.
What is a micro coaxial cable assembly?
A super-fine coaxial cable assembly is a complete cable harness system composed of a micro coaxial cable, connector, and terminal. The cable diameter is usually between 0.2mm and 1.37mm, allowing for multi-core flexible bundling. Common configurations include 16 cores, 32 cores, 64 cores, and even over a hundred cores. Each cable maintains a coaxial structure, therefore it has excellent high-frequency, high-speed, and anti-interference performance.
Second, detailed explanation of the working principle
Coaxial transmission structure
The structure of each miniature coaxial cable is as follows:
• Inner conductor: Copper or silver-plated copper wire, used for signal transmission
Inner insulation layer: high-performance FEP or PFA material, isolating signals and stabilizing impedance
Metal shielding layer: combination of woven mesh and aluminum foil, effectively blocking external electromagnetic interference
• Outer sheath: wear-resistant, anti-corrosive, protecting the internal structure
The core principle lies in that when the signal is transmitted along the inner conductor, a concentric circular electromagnetic field is formed between the inner conductor and the shielding layer. This enclosed space effectively isolates external electromagnetic waves, preventing signal interference and leakage.
Electromagnetic Field Control and Impedance Matching
In high-speed digital or radio frequency signal transmission, extremely thin coaxial cables can achieve:
Constant characteristic impedance (such as 50Ω, 75Ω)
Precisely controlled electromagnetic field envelope
Coaxial structure reduces signal reflection and minimizes crosstalk
These characteristics ensure the high speed, stability, and low loss of signal transmission within miniature devices.
3. High-frequency signal adaptability
The ultra-fine coaxial cable features a design with thin conductors and thin insulation layer, effectively reducing transmission delay and capacitive effects, especially suitable for GHz-level high-frequency signals, such as:
5G millimeter wave transmission
High-definition camera MIPI interface
Medical ultrasound signal
4. Advantages of Cable Componentization
Micro Coaxial Cable Assembly is not just a cable, but an integrated assembly of cable, connector, and terminal, offering multiple advantages:
Multi-core bundling and unified interface
Easier for internal wiring of the device
High-speed multi-signal synchronous transmission
Good flexibility, suitable for complex micro-space environments
Extremely thin coaxial cable assembly (Micro Coaxial Cable Assembly) solves the transmission difficulties of small spaces, high-speed signals, and high-frequency interference with its coaxial structure, multi-layer shielding, stable impedance, and componentized assembly, and is the preferred solution for internal connections of future high-end miniature electronic devices.
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 customers with 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).
