How fast can a super-thin coaxial cable transmit? Comprehensive analysis of high-speed transmission performance

In today's rapidly developing field of high-performance applications such as 5G communication, high-definition display, medical imaging, and industrial automation, the demand for high-speed signal transmission is continuously rising. To meet this trend, extremely thin coaxial cables (Micro Coaxial Cable) have gradually become an important solution in the high-frequency transmission field. Not only do they possess high bandwidth and low loss characteristics, but they also meet the spatial constraints of modern electronic devices with their lightweight and flexible structural design. This article will delve into the transmission capabilities of extremely thin coaxial cables and their advantages in high-speed applications.

Basic Concept of Ultra-Fine Coaxial Cable

Micro coaxial cable is a highly precise radio frequency transmission cable, with a typical diameter less than 0.5mm, and some models even as low as 0.18mm.
It consists of four parts: central conductor, insulation layer, shielding layer, and outer sheath, featuring stable characteristic impedance, excellent anti-interference ability, and good mechanical flexibility.
Thanks to this miniaturized structure, extremely thin coaxial cables perform outstandingly in devices with extremely limited internal spaces, such as smart terminals, medical equipment, AR/VR, and drones.

High-speed transmission performance of ultra-fine coaxial cables

The capability of extremely thin coaxial cables to support high-speed signal transmission mainly depends on core parameters such as bandwidth, impedance control, and signal attenuation characteristics.
Bandwidth frequency range
High-quality ultra-fine coaxial cables can support operation frequencies of up to 20GHz and above, theoretically achieving transmission rates of up to 10Gbps or even higher, fully meeting the needs of high-speed digital signals.
Impedance matching ability
Common design impedance is 50Ω or 100Ω, which can achieve good impedance consistency, effectively reduce signal reflection and crosstalk, and ensure the integrity and stability of high-speed signals.
3. Low attenuation and low latency characteristics
By optimizing the design of the shielding layer and insulating material, the extremely fine coaxial cable can still maintain extremely low loss in long-distance or high-frequency transmission, with minimal delay and superior EMI resistance.
Typical application examples
In high-speed interfaces such as MIPI, eDP, USB4, Thunderbolt, and PCIe, Micro Coaxial Cable can achieve data transmission rates of up to 6Gbps to 20Gbps.
 For example, cable solutions of this kind are widely used in medical image real-time transmission, notebook high-definition camera modules, and high-speed industrial vision systems.

Part 3: Comparison and Development Trends

Compared with other cable solutions
Compared with traditional FPC (Flexible Printed Circuit) or multi-core copper wire, ultra-fine coaxial cables perform better in signal integrity and high-frequency performance; at the same time, they are smaller in size and can achieve high-speed connections in compact spaces. Their flexibility and bend resistance characteristics also make them capable of meeting complex internal wiring requirements, making them an ideal choice for precision equipment.
Future development trends
With the continuous growth of applications such as high-definition video, AR/VR, vehicle radar, and AI terminals, the demand for bandwidth and speed will further increase. In the future, ultra-fine coaxial cables are expected to support speeds of up to 40Gbps and beyond, becoming one of the core foundations of the next-generation high-speed interconnection technology.



Extremely fine coaxial cables, with their excellent signal integrity, extremely low loss characteristics, and lightweight structure, have become an important connection solution for high-speed transmission applications. Whether it is a 10Gbps data link or higher frequency radio frequency signals, they can meet the requirements of modern electronic systems with stable and reliable performance. With the continuous advancement of high-speed interconnect technology, Micro Coaxial Cable will play an even more critical role in consumer electronics, medical, and industrial fields.
I am[Suzhou Huichengyuan Electronic Technology]Long-term focus on the design and customization of high-speed cable harnesses and ultra-fine coaxial cable harnesses, committed to providing stable and reliable high-speed interconnect solutions. If you have related needs or want to learn more, please contact:Manager Zhang 18913228573 (same as WeChat)。