In the field of modern high-frequency signal transmission, ultra-fine coaxial cables (micro coaxial cable) are widely used in scenarios such as smartphones, laptops, vehicle systems, and medical imaging equipment due to their excellent signal integrity and miniaturization advantages. With the continuous increase in transmission frequency, high-frequency loss has become a critical issue that engineers must focus on during design.
The main source of high-frequency loss in extremely fine coaxial beam
In high-frequency transmission, signal loss is mainly affected by the following factors:
Medium Loss (Dielectric Loss): The dielectric constant and the tangent of the loss angle of the cable insulation material determine the size of the medium loss, and the higher the frequency, the more obvious the loss.
• Conductor Loss: High-frequency signals tend to conduct on the surface of the conductor, and surface roughness and material directly affect the loss.
Connector contact impedance: The quality of the connector's connection affects the impedance matching of the entire link. If there is impedance discontinuity, it will lead to increased return loss and reduced signal integrity.
The key to high-frequency loss control: high-quality connectors
In addition to the selection of the cable itself, the connector performance is crucial for the high-frequency characteristics of the entire extremely thin coaxial cable assembly. Taking KEL USLS20-30 as an example:
Miniature high-density design: pitch only 0.4mm, compatible with 0.3mm outer diameter coaxial cables, suitable for laptop computers, medical imaging and portable devices, etc. that have strict requirements for high-frequency signal integrity.
Excellent impedance control: effectively reduces signal reflection, ensures stable transmission of high-frequency signals.
Excellent reliability: over 30 insertion and extraction cycles, with good contact reliability and shock resistance.
Three, current status of market substitutes
Currently, there are domestic male and female connectors as substitutes for USLS20-30 on the market. Some domestic brands have launched compatible models with more competitive prices, which are suitable for cost-sensitive projects. After long-term development, these substitutes have approached or can match the original factory products in terms of high-frequency characteristics, reliability, and long-term stability.
Suggestion for High Frequency Applications of Extremely Fine Coaxial Cable Assemblies
Prefer low-loss dielectric materials such as FEP or ePTFE insulation layers.
• Connectors use high-performance products with good impedance consistency, such as the KEL USLS20-30 series.
Control the welding process to ensure that the contact resistance is below 50mΩ and the impedance deviation is controlled within ±10%.
• The cable port is well shielded against EMI to reduce high-frequency interference.
In high-frequency signal transmission, controlling the loss of extremely thin coaxial cable束 is crucial, and high-quality connectors are the core of ensuring signal stability. With excellent impedance matching and reliability, KEL USLS20-30 becomes the ideal partner for extremely thin coaxial cable束.
We have been focusing on the design and customization of high-speed signal 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 want to learn more, please contact: Manager Zhang.
18913228573 (WeChat number).
