Ultra-fine coaxial line insertion loss analysis and its impact on high-frequency signals

In high-frequency electronic devices, the integrity of signal transmission is crucial. Micro coaxial cables, due to their small size and dense wiring, are prone to loss of high-frequency signals during transmission, among which insertion loss is an important factor affecting signal quality. This article will analyze the meaning of insertion loss, the sensitivity of insertion loss in ultra-fine coaxial cables, and the impact of insertion loss on practical applications from three aspects to help understand and optimize the signal performance of micro coaxial cables.

What does "insertion loss" really mean?

Insertion loss can be understood as the energy loss in the signal transmission process due to cables or connectors. To put it in a metaphor, it's like when you pass information to a friend, some content is lost due to resistance. Insertion loss is usually expressed in decibels (dB), with a smaller value indicating a more complete signal and a larger value indicating significant signal attenuation. In miniature coaxial cables, due to their extremely thin wire diameter and compact structure, high-frequency signals are easily affected by factors such as resistance, medium characteristics, and cable length, making the insertion loss issue particularly prominent.

Why is insertion loss more sensitive in ultra-fine coaxial cable束?

In actual engineering, we find that the insertion loss of miniature coaxial connectors has a significant impact on high-frequency signals. The main reasons include:

The finer the conductor, the greater the loss: with a small wire core, high-frequency signals are concentrated on the surface (skin effect), the effective conductor area is small, and it is prone to attenuation.

2.2 The higher the frequency, the more obvious the insertion loss: High-frequency signals experience increased loss in conductors and insulating media.

The longer the line, the greater the loss: the signal gradually attenuates in long cables, and the cumulative effect is significant.

Material impact is significant: high-quality metal conductors and low-loss insulating materials can significantly reduce insertion loss and ensure signal integrity.

By material selection, cable length reduction, and cable structure optimization, effective control of insertion loss can be achieved.

Three, the impact of insertion loss on application

Insertion loss is not only a theoretical parameter; it directly determines equipment performance and system stability:

3.1 Signal quality: Excessive insertion loss can lead to data transmission errors or reduced rate.

3.2 System Stability: Even minor insertion loss differences can cause performance fluctuations in high-precision equipment.

3.3 Reliability: In extreme environments such as aerospace and medical fields, low insertion loss miniature coaxial cables can ensure long-term stable signal transmission.

In high-frequency applications, controlling insertion loss is an important measure to ensure signal integrity and improve equipment reliability.

Insertion loss is an important indicator for measuring the efficiency of signal transmission and the reliability of miniature coaxial cable bundles. Understanding its source, influencing factors, and control methods is crucial for the design and performance optimization of high-frequency electronic devices. Choosing high-quality conductors, low-loss insulating materials, and optimizing the length and structure of the cable are key means to reduce insertion loss and improve signal stability.

I am[Suzhou Huichengyuan Electronic Technology]Long-term focus on the design and customization of high-speed signal cable harnesses and ultra-thin coaxial cable harnesses, committed to providing customers with stable and reliable high-speed interconnect solutions. If you have related needs or want to learn more, please feel free to contact:Manager Zhang 18913228573 (WeChat same number)。