Why can ultra-fine coaxial cables support increasingly higher Gbps rates?

In modern electronic devices, high-speed signal transmission places stricter requirements on the performance of cables. As a key component applied in scenarios such as chip testing, camera module, and display connection, ultra-fine coaxial cables (Micro Coaxial Cable) have gradually become the core solution for high-speed interconnection due to their small size, low loss, and good wiring capabilities. So, what factors affect its transmission speed limit?

How does the cable structure determine the high-speed capability?
The ultra-fine coaxial cable consists of a central conductor, insulating layer, shielding layer, and outer sheath. The finer the central conductor, the more limited the bandwidth it can carry. However, by selecting materials with low dielectric constant and optimizing the shielding structure, significant losses can be reduced, thereby enhancing the overall transmission capability. In some high-performance designs, even fine wire diameters such as 28AWG, 32AWG can achieve high-speed data transmission at the level of several Gbps.

Impedance matching is the foundation for stable high-speed operation.
In high-speed links, impedance mismatch can cause signal reflection, increased jitter, and degradation of eye diagram quality, thereby limiting data rate. Very fine coaxial cables are typically designed with a characteristic impedance of 50Ω or 100Ω, maintaining consistency through strict material control and manufacturing processes to ensure the integrity and stability of high-speed signals.

How is the speed performance in practical applications?
In the MIPI interface adopted by camera module, the eDP interface used by display module, and the high-speed test cables, ultra-fine coaxial cables have already been able to achieve data rates of 6Gbps and even higher. With the ever-increasing requirements of devices for resolution, frame rate, and data volume, the continuous upgrade of insulation materials and shielding technology will further promote the continuous increase of the speed limit of ultra-fine coaxial cables.

The rate limit of extremely fine coaxial cable bundles is not a fixed value, but is determined by multiple factors including conductor size, medium material, impedance control, and processing accuracy. With the continuous advancement of material technology, the potential of such cable bundles in the high-speed interconnect field will continue to be released.
I amSuzhou Huichengyuan Electronic TechnologyDeeply engaged in the design and customization of high-speed transmission cables and ultra-fine coaxial cables, committed to providing reliable and stable high-speed interconnection solutions. If you have related needs or plans to consult on projects, welcome to contactManager Yin 18913280527 (WeChat same number)We will provide you with professional support.