How does a micro camera achieve 4K? The answer lies in this extremely thin coaxial cable bundle

In a micro camera module, 4K image transmission can never be solved just by "chip performance". What truly determines whether the picture is clear and whether frames are dropped is that tiny, space-limited cable bundle hidden inside the module. If the cable bundle design is not adequate, even with a top-end sensor, the picture may still appear pixelated, noisy, snowy, or drop frames. To maintain stable 4K data transmission in such a confined space, it is necessary to rely on ultra-fine coaxial cable bundles that are structurally scientific, excellent in shielding, and flexible and reliable.

---

Transmission challenges of 4K images within modules

The data volume of 4K@60fps is enormous, just like having a lot of cars on a narrow highway, and any congestion can cause chaos throughout the line.

And the actual challenges faced inside the camera module are far more complex than imagined:

The space is extremely limited, and the wire must be thin enough to fit around various compact structures.

The electromagnetic environment is noisy, with interference sources such as radio frequency antennas, motors, and power circuits nearby.

Modular components often require bending, so the flexibility and durability of the wire material must meet the requirements.

In this case, the wire must have small volume, high-speed transmission capability, and strong anti-interference performance, making extremely fine coaxial cables the most suitable solution.

---

Why ultra-fine coaxial cable assemblies are the mainstream choice for 4K modules

People who have disassembled drones, mobile phones, or endoscope modules will see many thin wires with a diameter of only 0.2 to 0.3 mm, which are precisely ultra-fine coaxial cables. Compared with traditional ribbon cables, it has obvious advantages:

Independent shielding structure, significantly reduce crosstalk.

Impedance can be precisely controlled at 50Ω or 100Ω differential, providing more stable high-speed signals.

Small in volume, it can be arranged in the most compact module interior.

Flexible, capable of withstanding bending, folding, and dynamic motion.

In a camera module as small as a fingernail, the ultra-fine coaxial cable is almost the only reliable solution for stable 4K image processing.

---

Three, key points in harness design

High-speed harness design has many intricacies, and it can easily lead to abnormal images or difficulties in mass production. This includes:

Wiring material itself
The conductor being too thin will cause significant loss and lead to signal attenuation.

• The屏蔽layer coverage must be high to avoid WiFi/5G interference causing the screen to appear wavy.

The sheath material must be soft and durable, otherwise the pass rate of good products will decrease significantly.

Cable Layout
• The shorter, the better; the straighter the signal path, the more stable it is.

 Ensure sufficient bending radius; otherwise, long-term stress may cause the wire to break.

Signal lines and power lines should be routed separately to reduce coupling interference.

3. Connector design
Interface must match high-speed transmission and should not blindly reduce costs.

The shielding layer must be effectively grounded with the shell to avoid EMI leakage points.

  The insertion and extraction life should be sufficient, as testing and assembly will involve repeated insertion and extraction.

These factors determine whether the module can stably output 4K images, and also directly affect whether the product can be smoothly mass-produced.

In a micro camera module, whether stable 4K image transmission can be achieved does not depend on the sensor, but on a "seemingly insignificant" extremely thin coaxial cable assembly. Only when the specifications of the cable material, shielding design, impedance control, layout, and connector matching are all in place, can high-speed image signals be transmitted stably within an extremely small space. For any high-resolution, miniaturized camera module, the extremely thin coaxial cable assembly is an indispensable key link.

I amSuzhou Huichengyuan Electronic Technology Co., Ltd.Long-term focus on the design and customization of high-speed signal cable harnesses and ultra-fine coaxial cable harnesses, committed to providing stable and reliable high-speed interconnection solutions. If you have any related needs or want to learn more, please contact Manager Zhang:18913228573 (WeChat number)。