Guide to selecting ultra-fine coaxial cables for car camera modules

With the continuous popularization of intelligent driving and vehicle-mounted vision systems, the requirements for signal stability of camera modules are becoming higher and higher. The extremely thin coaxial cables inside the module, which are used to transmit high-speed image signals, play a crucial role in image quality, anti-interference, and the overall lifespan of the unit. It is crucial to choose and apply such cable harnesses reasonably to ensure the reliable operation of the imaging system.

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The importance of extremely fine coaxial cables in vehicle-mounted cameras

High-speed image signals such as GMSL, FPD-Link, and LVDS require extremely high bandwidth, impedance consistency, and anti-interference capabilities. The extremely thin coaxial cables, with their good shielding structure, high bandwidth characteristics, and excellent flexibility, can effectively enhance the stability of the module in complex vehicle-mounted environments. Their compact size is also suitable for tight module spaces and maintains good reliability under conditions of vibration and large temperature differences, significantly superior to traditional FPC or ribbon cable solutions.

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Two, key indicators for selecting ultra-fine coaxial cables

The core of selecting wire materials for vehicle-mounted modules lies in ensuring signal integrity and long-term reliability. Characteristic impedance needs to be consistent with system design to reduce reflection and signal distortion; materials and structures should have good low-loss characteristics to cope with high-frequency and high-speed transmission; multi-layer shielding structures can enhance anti-interference performance; bending resistance and temperature resistance are essential factors in automotive applications that cannot be ignored, and they need to match the working environment from -40°C to 125°C.

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Three, design suggestions in practical applications

To ensure the stable operation of the vehicle-mounted image system, optimization is required from both the wiring method and process control aspects. The signal lines should be shortened as much as possible to reduce attenuation; the termination process needs to be strictly matched with the module interface; if a PoC solution is involved, the wire material needs to take into account both power and signal transmission performance; before mass production, passing tests such as eye diagrams, error rate, temperature cycling, and vibration can ensure the stability of the wire material in actual operating environments.

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The ultra-thin coaxial cable is an important link affecting signal quality in vehicle-mounted camera modules. Its performance in high-speed and complex electromagnetic environments directly determines the reliability of the imaging system. Through reasonable selection and structural design, the stability of image transmission and the service life of the whole machine can be significantly improved.

I amSuzhou Huichengyuan Electronic Technology Co., Ltd., Focus on the customization and design of high-speed cable harnesses and ultra-fine coaxial cable harnesses for stable and reliable high-speed interconnection solutions. Please contact us if needed.Yin Manager: 18913280527 (WeChat same number)。