In high-precision fields such as 8K ultra-high-definition display, medical endoscopic imaging, and smart wearable devices, the requirements for signal transmission are continuously increasing, while cables are moving towards smaller sizes and higher performance. Micro Coaxial Cable (extremely thin coaxial cable) has become a star product in high-frequency and high-speed applications thanks to its extremely small diameter, excellent signal integrity, and anti-interference ability. But how does this "fine as hair" cable achieve such low signal loss? Today, we will systematically analyze its technical advantages.
What is signal attenuation?
Signal Loss refers to the phenomenon where the signal gradually weakens during its transmission from the sending end to the receiving end due to factors such as transmission materials, electromagnetic environment, and structural characteristics. In simple terms, it is the weakening of the signal during its "long journey," which may even result in distortion, delay, or inability to be accurately identified.
Why does signal loss occur?
Common factors affecting signal attenuation include:
Conductor loss
The transmission of signals in conductors will result in energy loss due to resistance, and this is particularly evident in high-frequency signals.
Medium loss
The signal passing through insulating material is consumed as heat due to the dielectric constant and loss factor of the material.
Radiation loss
The signal leaks into the surrounding space in the form of electromagnetic waves, causing energy loss.
Reflection loss
When the impedance of the transmission line is inconsistent, the signal will produce reflection at the interface, part of the energy is "bounced back", resulting in reduced effective signal.
Crosstalk issue
Electromagnetic coupling between adjacent cables can affect signal integrity, causing interference and distortion.
Why can Micro Coaxial Cable achieve ultra-low signal loss?
Optimized coaxial structural design
The coaxial structure naturally possesses excellent EMI suppression capabilities. The inner conductor is located at the center, surrounded by a complete shielding layer, which can effectively prevent signal leakage and simultaneously reduce external electromagnetic interference from entering.
High-frequency low-loss insulating material
Micro coaxial cable commonly uses high-frequency insulating materials such as FEP, PTFE, etc. These materials have small dielectric constants and extremely low loss factors, which can significantly reduce the energy loss of signal transmission in the medium.
Double shielding: high-density weaving + metal foil
To further improve the anti-crosstalk and anti-EMI performance, extremely thin coaxial cable bundles usually adopt a high-density tinned copper wire braided layer, and are complemented by aluminum foil shielding to achieve double-layer protection, ensuring a purer signal path.
④ Precision manufacturing technology ensures consistency
The manufacturing process of extremely fine coaxial cable bundles requires very high standards, including conductor concentricity, uniformity of insulation thickness, and shielding coverage. Through laser stripping, micro spot welding, and automated coaxial cable assembly equipment, its performance can be ensured to be stable and consistent.
Micro Coaxial Cable can achieve ultra-low signal loss in extreme spaces relying on:
Superior coaxial shielding structure
High-frequency low-loss insulating material
Double-layer shielding anti-interference design
High stability brought by precision technology
Flexible cable solutions that can be customized according to application scenarios.
Therefore, ultra-fine coaxial cables are becoming an irreplaceable key material for high-frequency and high-speed transmission.
We have been focusing on the design and customization of high-speed cable harnesses and ultra-fine coaxial cable harnesses for a long time, committed to providing stable and reliable high-speed interconnection solutions. If you have any related needs or would like to learn more, please contact: Yin Manager.
18913280527 (WeChat number)。
