With the explosion of AI computing demand, the high-speed interconnection architecture inside servers has become increasingly complex. Whether it is GPU clusters, AI acceleration cards, or CXL interconnect modules, they all rely on the high-speed communication of PCIe buses. In these critical links, extremely thin coaxial cable bundles (Micro Coaxial Cable) are gradually becoming the preferred solution. Compared with traditional differential lines or PCB routing schemes, extremely thin coaxial cable bundles stand out in the high-speed interconnection of AI servers with their excellent signal integrity, anti-interference ability, and wiring flexibility.
An Overview of Extremely Fine Coaxial Beam
The extremely thin coaxial cable bundle consists of multiple miniature coaxial cables and high-precision connectors. Each coaxial cable contains a central conductor, insulation layer, shielding layer, and outer sheath. Its greatest advantage lies in its ability to ensure high-quality signal transmission and strong shielding performance in a very small volume. This design is very suitable for applications with tight space, dense signals, and extremely high speeds, such as high-speed interconnection between GPU modules, CPU mainboards, and expansion cards, providing reliable internal link support for AI servers.
Chapter Two: Challenges of PCIe Interconnect for AI Servers
As the PCIe standard evolves from Gen4 to Gen5, Gen6, and beyond, with the single-channel speed increasing from 16GT/s to 32GT/s and even higher, the interconnect links within servers face multiple challenges:
High-frequency signal loss——High-frequency signals are more prone to attenuation, reflection, and distortion
Electromagnetic Interference (EMI) - There are many interference sources in a high-density component environment.
Cabling constraints - traditional cables are difficult to meet the wiring requirements of high-density, compact enclosures
High reliability requirements——frequent plugging and unplugging, complex vibration environment, strict requirements for mechanical strength and stability
These factors make traditional twisted pair and PCB routing solutions difficult to fully meet the needs of high-speed interconnectivity, and there is an urgent need for new solutions.
The core advantages of ultra-fine coaxial beam
Extremely thin coaxial cable束 possesses the following advantages in high-speed interconnects of AI servers:
Excellent signal integrity—stable impedance channel reduces reflection and crosstalk, supports PCIe Gen5 and above speeds
Strong shielding anti-interference—the 360° shielding layer effectively isolates EMI, ensuring signal stability
High-density wiring and flexibility—fine-core cables facilitate passage through narrow spaces, and flexible design does not affect heat dissipation and airways
Modularization and plug-and-play capabilities—support for quick replacement, testing, and upgrades, enhancing maintenance convenience and system scalability
With the increasing demand for high-speed interconnects in AI servers and high-performance computing systems, ultra-fine coaxial cable bundles are gradually replacing traditional copper wiring and interplane connection schemes, becoming the mainstream choice for high-speed interfaces such as PCIe, CXL, and NVLink.
The PCIe link of AI servers is moving from sufficient to high precision, low loss, and high stability. The extremely thin coaxial cable bundle, with its high bandwidth, high shielding, strong flexibility, and flexible wiring, has become the ideal solution for connecting motherboards, GPUs, and AI modules. In the era of high-speed interconnectivity, mastering signal integrity is equivalent to mastering AI computing power, and the extremely thin coaxial cable bundle is the most stable link in this vital part.
I am [Suzhou Huichengyuan Electronic Technology], long-term focused on the design and customization of high-speed signal cables and ultra-thin coaxial cables, committed to providing stable and reliable high-speed interconnection solutions. For more information or customized solutions, please feel free to contact us.
Manager Zhang: 18913228573 (WeChat number)。
