Ultra-fine coaxial cable: the key to improving image transmission quality

In mobile devices, industrial vision systems, and smart terminals, the high-speed differential signal of MIPI (Mobile Industry Processor Interface) has become the core technology for image data transmission. With the continuous increase in display resolution and image frame rate, the demand for transmission bandwidth has greatly increased, which puts higher requirements on the signal integrity, anti-interference, and flexible design of cables. Micro coaxial cables (Micro Coaxial Cable) have become an important choice for transmitting MIPI signals due to their excellent electrical performance and flexible characteristics.

Advantages of ultra-fine coaxial cable
Compared with traditional FPC or twisted pair cables, ultra-thin coaxial cables have multiple unique advantages in MIPI signal transmission. Firstly, their coaxial structure can achieve more precise impedance control, ensuring the consistency of 100Ω differential impedance, thereby significantly reducing reflections and signal loss. Secondly, the outer metal shielding layer provides strong electromagnetic interference (EMI) protection for the signal, allowing it to remain stable in complex environments. Finally, the diameter of ultra-thin coaxial cables is typically between 0.3mm and 0.5mm, balancing small size and high flexibility, and can meet the bending wiring requirements inside compact devices.

Second, the adaptation performance of MIPI high-speed signals
MIPI D-PHY and C-PHY interfaces typically require high-speed transmission of more than 1Gbps per channel, and extremely thin coaxial cables excel in such applications. Their low attenuation characteristics ensure the integrity of high-frequency signals, maintaining ideal eye diagram opening; at the same time, the design of single cable independent shielding significantly reduces channel-to-channel crosstalk. In mobile phone camera modules, vehicle imaging systems, and AR/VR devices, extremely thin coaxial cables have been widely adopted and have become one of the standard configurations for MIPI interface solutions.

Three, key points in design in engineering practice
In practical applications, the performance of ultra-fine coaxial cables depends on reasonable system design. Firstly, connector matching is crucial, and high-speed connectors that support micro coaxial structures must be selected to reduce reflection and insertion loss. Secondly, the termination and welding processes need to be strictly controlled to ensure signal consistency. Finally, balancing cost and performance is an important consideration for engineers - although ultra-fine coaxial cables are slightly more expensive, their advantages are irreplaceable in scenarios with high-resolution and high-stability requirements.

In summary, ultra-fine coaxial cables, in the context of MIPI high-speed differential signal transmission, combine the advantages of bandwidth, anti-interference, and flexibility, making them an ideal solution for mobile imaging and high-speed interconnect applications. With the development of 8K imaging, AR interaction, and industrial vision systems, the demand for high bandwidth and high reliability will continue to drive the innovation and application expansion of ultra-fine coaxial technology.
I am[Suzhou Huichengyuan Electronic]Long-term focus on the research and development, as well as customization, of high-speed signal cables and ultra-fine coaxial cables, committed to providing customers with high-performance, stable and reliable high-speed interconnection solutions. If you have related needs or want to learn more, please contact:Manager Zhang 18913228573 (WeChat same number)。