As electronic devices continue to evolve towards slimming down and becoming faster, micro coaxial cable has become an indispensable internal connection solution in fields such as consumer electronics, medical imaging, drones, and vehicle imaging. In high-frequency, high-speed, and high-density signal transmission scenarios, how to correctly select a micro coaxial cable assembly is crucial for ensuring system performance and reliability. This article will help you sort out the five core elements of micro coaxial cable assembly selection, and will focus on introducing a widely used high-density connector—the I-PEX 20634-130T-02.
1. Transmission frequency and rate requirements
The requirements for signal frequency and transmission rate vary greatly among different devices. When selecting, it is necessary to ensure that the harness and connector can meet the system bandwidth and signal integrity requirements. Micro coaxial cable has excellent high-frequency transmission performance and is particularly suitable for application in high-speed digital signal systems, such as MIPI, LVDS, PCIe interfaces, etc.
Interface type and connector compatibility
The extremely fine coaxial cable束usually needs to be paired with connectors from brands such as I-PEX, JAE, etc. According to the structure size and installation method of the equipment, a matching model should be selected. Among them, the I-PEX 20634-130T-02 is known for its 0.4 mm minimal spacing and 30 Pin high-density design, and is widely used in high-end laptops, industrial cameras, and medical equipment, balancing space saving and performance stability.
3. EMI Shielding Performance
In high-speed signal systems, electromagnetic interference (EMI) is one of the main factors affecting signal quality. High-quality micro coaxial cables usually have woven or metallic foil shielding layers, which can effectively suppress interference and ensure signal integrity and system robustness, making them suitable for industrial and imaging systems with stringent EMI requirements.
4. The bending radius and flexibility
In compact and space-limited devices, the flexibility and bend resistance of wire harnesses are particularly important. micro coaxial cable has an extremely thin diameter and excellent flexibility, allowing for multiple bends in confined spaces without affecting transmission performance, making it very suitable for internal wiring in thin and light devices.
5. Installation Process and Reliability
Extremely fine coaxial cables have very high requirements for the process during welding or crimping. The contact stability of the connector terminals is directly related to the service life and signal stability of the entire machine. The I-PEX 20634-130T-02 uses an upper-connector FPC connection method, combined with a stable locking structure, which can still maintain reliable contact after multiple insertions and withdrawals, meeting the stability requirements for long-term use.
I-PEX 20634-130T-02 Connector Detail
Product series and positioning
This model belongs to the CABLINE®-CA (20525 series) miniature coaxial connector, with a pitch of only 0.4 mm, specifically designed for high-density signal transmission.
Can be matched with various cables such as micro coaxial cable, FPC, twisted pair, and is widely used in high-performance equipment such as consumer electronics, industrial automation, and medical imaging.
High-speed transmission and signal integrity
The standard configuration supports 20 Gbps/lane NRZ transmission; with the配套 paddle card, it can be upgraded to 64 Gbps PAM4 (suitable for some 50-pin models).
Typical wire materials use AWG #40, 50Ω characteristic impedance, which have an extremely high match with I-PEX series devices, ensuring signal integrity and low reflection.
Cable adaptation and processing specifications
Supports a variety of miniature cable structures (#40 or finer), compatible with micro-coaxial, twisted pair, and FPC.
The 30-pin model (20634-130T-02) is commonly used for MIPI / LVDS signal cables and can be combined with welding and UV curing sealing technology to ensure mechanical strength and protective performance.
Extremely fine coaxial cable束（micro coaxial cable）as a key component for high-speed signal transmission, its selection needs to take into account multiple dimensions such as frequency, interface, shielding, flexibility, and technology. Choosing connectors like the I-PEX 20634-130T-02 with high density and performance can not only optimize the system layout but also significantly improve the overall transmission efficiency and stability of the entire machine.
We have been focusing on the design and customization of high-speed cable harnesses and ultra-fine coaxial cable harnesses for a long time, committed to providing stable and reliable high-speed interconnect solutions. If you have any related needs or would like to learn more, please contact: Manager Zhang.
18913228573 (WeChat number).
