Cable Selection in the High Refresh Rate Era: Can Ultra-Fine Coaxial Cables Meet the Challenge?

High refresh rate screens from 120Hz, 240Hz to 500Hz have brought a significant boost to the visual experience, while also multiplying the pressure on signal transmission bandwidth. The higher the resolution and the faster the refresh rate, the more stringent the requirements for the high-speed transmission capability of the cables. The extremely thin coaxial cables (Micro Coaxial Cable) commonly used in compact devices have therefore become a focal point: Can they carry high bandwidth? Can they be compatible with future higher refresh rates?

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One、High refresh rate puts forward higher requirements for bandwidth

The bandwidth is determined by resolution, refresh rate, and color depth. For example, 4K@60Hz already requires tens of Gbps. Once it is increased to 120Hz, 144Hz, or incorporates HDR, the bandwidth will rapidly multiply. Higher screen specifications mean that the signal transmission lines must have better anti-interference capability, lower loss, and higher bandwidth margin, otherwise, it is prone to unstable images, flickering, or signal interruption.

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The advantages and limitations coexist in ultra-fine coaxial beam.

Micro coaxial cable has the advantages of being thin, flexible, suitable for compact wiring, and possessing certain high-speed transmission capabilities, thus it is widely used in notebook and tablet devices. However, in high refresh rate applications, it also faces limitations such as signal attenuation due to bandwidth increase, distance sensitivity, and increased shielding requirements. If the cable design is not rigorous enough, bandwidth insufficiency or a decrease in signal integrity may occur under 4K high refresh rate or higher specifications.

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Effective strategies to enhance bandwidth capacity

To better adapt ultra-fine coaxial cable bundles to high refresh rate applications, engineering designs will adopt measures such as shortening transmission distance, enhancing shielding structures, strictly controlling impedance, and improving overall bandwidth capability through multi-channel parallel transmission. At the same time, modern display solutions will also combine visual lossless compression technology to carry higher data volumes within limited bandwidth, thereby providing stable and reliable image output for high refresh rate devices.

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High refresh rate screens make image performance smoother and also put unprecedented bandwidth requirements on cables. Extremely thin coaxial cables are still the mainstream solution in compact devices, and with reasonable design and optimization, they can still meet the transmission needs of high resolution and high refresh rate.

I am[Suzhou Huichengyuan Electronic Technology]Long-term focus on the design and customization of high-speed signal cable harnesses and ultra-fine coaxial cable harnesses, providing high-reliability and high-speed interconnection solutions for medical equipment customers. Welcome to contactManager Yin: 18913280527 (WeChat same number)Access more technical support.