Cable Connector Shield Structure for Crosstalk Reduction
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Solution Overview
Problem
Existing cable connectors face challenges in effectively shielding signal terminal pairs and cables to reduce crosstalk.
Innovation Solution
A cable connector design featuring a built-in circuit board with strategically arranged conductive pads and metal shields, including extension portions in contact with ground pads, and a fixing component to secure the metal shield and grounding layer, enhancing shielding effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cable connectors without metal shields are used, then the device complexity is low, but the shielding effectiveness and crosstalk reduction are insufficient
Solution Approach 1:
The metal shield is divided into multiple segments including a first metal shield segment, second metal shield segment, third metal shield segment, and fourth metal shield segment. Each segment is positioned at different locations along the cable connector to provide distributed shielding against electromagnetic interference, thereby improving shielding effectiveness while managing structural complexity through modular segmentation.
Solution Approach 2:
The metal shield segments are nested within the cable connector structure, with each segment positioned inside the connector housing. The shielding layers are arranged concentrically around the signal pairs, creating a nested configuration that maximizes shielding effectiveness within the available space while maintaining a compact overall structure.
2Reliability
If metal shields with extension portions are added to improve shielding, then the shielding effectiveness improves, but the manufacturing complexity increases
Solution Approach 1:
The metal shield extension portions are merged with the grounding structure of the cable connector. The extension portions directly contact the grounding layer and are integrated into the overall grounding system, eliminating the need for separate grounding components and simplifying the manufacturing process while maintaining effective shielding.
Solution Approach 2:
The metal shield extension portions are strategically positioned at specific locations where electromagnetic interference is most problematic. The shielding structure has varying density and coverage at different locations, with extended shielding at cable entry/exit points and reduced shielding in less critical areas, optimizing manufacturing efficiency while maintaining adequate shielding effectiveness.
3Reliability
If extensive grounding areas with multiple ground pads are implemented, then the crosstalk reduction improves, but the circuit board area requirements increase
Solution Approach 1:
The grounding system extends into the third dimension by utilizing vertical spacing between the circuit board and the metal shield segments. Grounding pads are arranged in multiple layers and at different heights, creating a three-dimensional grounding network that provides extensive grounding area without proportionally increasing the two-dimensional circuit board footprint.
Solution Approach 2:
The grounding area is segmented into multiple discrete ground pads distributed at different locations on the circuit board. Rather than requiring one large continuous grounding area, the segmented ground pads are strategically positioned to provide effective grounding for each signal pair while minimizing the total area occupied on the circuit board.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design significantly improves signal transmission quality by reducing crosstalk and providing robust shielding, utilizing a staggered arrangement of signal pairs and extensive grounding areas.
Implementation Method 1
a first metal shield, the first metal shield including a first main body portion, a first side wall extending from one side of the first main body portion, a first extension portion extending outwardly from the first side wall
Implementation Method 2
the first extension portion being in electrical contact with the first ground pad; the second extension portion being in electrical contact with the second ground pad
Data Source
AI summary
A cable connector includes a built-in circuit board, a first cable and a first metal shield. The built-in circuit board includes a first signal conductive pad, a second signal conductive pad, a first ground pad and a second ground pad. The first cable includes a first core, a second core and a first grounding layer. The first metal shield includes a first main body portion, a first extension portion and a second extension portion. The first main body portion defines a first through hole in which the first grounding layer is exposed. The cable connector further includes a first fixing component filled in the first through hole to fix the first main body portion and the first grounding layer together, thereby improving the shielding effect. A method of manufacturing the cable connector is also disclosed.