The Best Choice for High-Speed USB 3.1 Transmission: Ultra-thin Coaxial Cable Bundle Analysis

The theoretical speed of USB3.1 interface can reach 10Gbps, which puts extremely high requirements on cable structure, shielding performance, and signal integrity. With the development of electronic devices becoming lightweight and high-density, the traditional twisted pair solution gradually exposes its shortcomings in anti-interference performance. In contrast, extremely thin coaxial cable bundles (Micro Coaxial Cable) with independent shielding, high impedance consistency, and high flexibility and high-density characteristics have become the preferred solution in high-speed connection design, widely used in laptops, industrial camera modules, VR/AR equipment, and high-speed data acquisition systems.

---

Typical interference in USB3.1 signal

In high-speed signal transmission, USB3.1 faces various interference challenges, including electromagnetic interference (EMI), crosstalk, ground bounce noise, and signal reflections caused by impedance mismatch. High-speed switching signals generate strong electromagnetic radiation, which can easily interfere with adjacent lines and increase the error rate if not effectively shielded. Multi-route parallel wiring or asymmetric wiring can lead to crosstalk, and sharing the ground line may cause ground bounce noise. In addition, discontinuous impedance design or unoptimized solder points and connector transitions can cause signal reflections and eye diagram closure. All these factors threaten the stability and reliability of high-speed data transmission.

---

Advantages of solving ultra-fine coaxial beam

Extremely thin coaxial cable bundles, passing through independent shielding structures, effectively suppress EMI and crosstalk. Each signal line maintains strict impedance consistency (usually 90Ω±10%), significantly reducing signal reflection. Its thin and flexible design, with a wire diameter of about 0.3mm, allows for flexible wiring in space-limited environments. At the same time, it uses low dielectric constant insulating materials and silver-plated copper conductors to reduce high-frequency losses, maintaining stable eye diagram opening for 10Gbps signals. These characteristics enable it to ensure signal integrity and system stability in USB3.1 high-speed transmission scenarios, and is a key solution for high-performance electronic devices to achieve both high speed and lightweight.

---

Three, suggestions for interference protection in practical applications

In practical applications, differential noise can be reduced by increasing common-mode chokes at the interface ends, optimizing PCB via and connector matching to reduce impedance突变, and reasonably routing to maintain signal lines of equal length and symmetry. At the same time, high-quality extremely thin coaxial cables should be selected to ensure high-speed communication stability in complex electromagnetic environments. Combined with reasonable design and high-quality cables, the USB3.1 interface system can maintain reliable operation in high-speed and high-density applications and meet the dual needs of future devices for high-speed data transmission and system lightweighting.

---

USB3.1 high-speed signal transmission has set higher standards for cable and wiring design. Using extremely thin coaxial cables can significantly reduce EMI, crosstalk, and signal reflection, improving system stability and reliability. For industrial camera modules, VR/AR devices, and high-speed data acquisition systems, Micro Coax cable assemblies have become the core transmission solution that balances high speed, high density, and lightweight.

I am [ Suzhou Huichengyuan Electronic Technology ], a company that has long been focusing on the design and customization of high-speed signal cable harnesses and extremely fine coaxial cable harnesses. We are committed to providing stable and reliable high-speed interconnection solutions to our customers. For more information or customized solutions, please feel free to contact us.Manager Zhang: 18913228573 (same as WeChat)。