In the field of modern electronic engineering, equipment continues to be thin, high-speed and high-density integration, and traditional wiring harness solutions have been difficult to meet the stringent requirements of new modules in space and signals. The "very fine coaxial harness" composed of micro coaxial cables and high-density connectors has gradually become the mainstream solution in the fields of camera modules, display modules, embedded devices, AI camera systems and industrial imaging.

As a long-term focus on the production of very fine coaxial wire harness enterprises, we found in a large number of project applications: KEL USL20-30S series is one of the most classic, stable and highly reliable matching connectors. The following will bring you a clear and easy-to-read analysis from a technical perspective.

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1. why very fine coaxial wire harness become the mainstream trend?

The extremely thin coaxial harness is a combination of a miniature coaxial cable with a very small outer diameter (such as AWG#42) and a micro-pitch connector, which has excellent high-speed transmission and anti-interference capabilities. Compared with traditional cable or twisted pair, its advantages are more obvious:

1.1. Excellent high-speed and high-frequency performance: The coaxial structure has a complete level of center conductor, insulating layer, and shielding layer, which can effectively maintain differential signal quality and reduce reflection and crosstalk. It is especially suitable for MIPI, LVDS, CSI, DSI, etc. High-speed interface.

1.2. Very small occupied space: the wire diameter can be about 0.4mm. Combined with 0.4mm micro-pitch connectors, high-speed channels with more than 20~40 cores can be arranged in a very small area, thus greatly reducing the structural space pressure.

1.3, more flexible wiring: soft wire, small bending radius and customizable routing, making it suitable for complex structure and limited space inside the device.

1.4. Strong anti-interference ability: The combination of coaxial shielding structure and metal shell connector can significantly improve EMI protection ability and is very friendly to complex electromagnetic environment.

Based on the above advantages, we observe that its demand in small, high-performance module projects continues to grow, and it is one of the fastest growing wire harness types.

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Key Technical Points for Design of 2. Very Fine Coaxial Harness

In the design and mass production process of extremely fine coaxial harnesses, the following core technical elements need to be focused on:

2.1. Conductor and shielding structure design: The central conductor of the micro-coaxial line is extremely thin, and the integrity and weaving density of the shielding layer directly affect the signal stability. The more stable the geometry, the more reliable the high-speed characteristics.

2.2. Connector selection: The connector shall be accurately matched with the wire specification, Pin number, spacing and height requirements. The current 0.4mm spacing has become the mainstream; and the lower the connector height, the more favorable the thinning of the whole machine.

2.3. Harness length and wiring path planning: The spatial layout of different equipment is very different. The length, bending angle and branch structure of the harness must be reasonably planned in advance to avoid potential failure caused by assembly stress.

2.4, processing technology and consistency control: micro coaxial line processing accuracy requirements are high, from welding, crimping to shielding treatment, each process will affect the final quality. Therefore, the process capability and parameter consistency control of the factory are very important.

For long-term mass production projects, we will conduct system tests for bending life, plug life and high-speed signal integrity to ensure the long-term stability of the product in customer applications.

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3. KEL USL20-30S Connector Product Analysis

Among the many connectors suitable for very fine coaxial harnesses, the KEL USL series is widely used because of its high maturity and good stability. USL20-30S of them are very commonly used models in our production.

3.1, product structure features: channel number: 30Pin, to meet the camera, display, sensors and other high-speed small interface requirements. Pitch: 0.4mm, micro pitch design suitable for high density layout. With a height of about 1.0mm, the extremely thin structure is particularly suitable for thin and light devices. Metal shell design: strengthen the grounding path and shielding ability, improve EMI anti-interference performance

3.2 adapter wire: USL20-30S is often used in conjunction with AWG#42 micro-coaxial, which can stably support high-speed signals such as MIPI D-PHY and LVDS.

3.3 Performance and Application Advantages: In a large number of projects, USL20-30S show the following advantages: excellent assembly consistency, high-speed signal compatibility, almost all small module structures, stable and reliable tensile strength after crimping.

Therefore, it is a very typical and recommended standardized connector solution in the field of very fine coaxial wiring harness.

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Very fine coaxial wire harness has outstanding advantages in high speed, flexibility, anti-interference and space saving, and is an important part of modern high-density interconnection technology. As a mature and stable micro-pitch connector, KEL USL20-30S has excellent performance in structural height, shielding performance and micro-coax adaptation, and is a popular model in many product selection.

I amThunder speed very fine coaxial wire harness network], to provide customers with mature alternatives and engineering and product support for high-speed and extremely fine coaxial wiring harnesses and connectors. If you have any need, please contact Manager Zhang 18913228573 (WeChat with the same number).

About Us

Thunderspeed extremely fine coaxial wire harness netBelongableSuzhou Huicheng Yuan Electronic Technology Co., Ltd.，We focus onVery fine coaxial wire harnessThe company is deeply engaged in the field of high-speed transmission, with mature manufacturing technology, strict quality management system and rich industry application experience, products are widely used in consumer electronics, industrial control, medical equipment, intelligent security and other fields. We welcome customers in various industries to contact us at any time.