Twisted Shielded Connector Layout for Stable Twisted-Pair Signals
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Solution Overview
Problem
High-speed signal transmission connectors for twisted pair cables face issues with noise resistance due to warping of insulated wires, leading to deteriorated electric properties such as insertion loss and reflection loss.
Innovation Solution
The electrical connector incorporates a shield member with radially extending wire separation walls twisted in the same direction, forming accommodating grooves that align and stabilize the wire pairs, ensuring they are curved in the same direction, thus maintaining uniform distance and improving noise resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the wire pairs are accommodated in the outer shell without twisted separation walls, then the connector structure is simple, but the insulated wires warp in different directions causing non-uniform distance and deteriorated electric properties
Solution Approach 1:
The shield member is segmented into multiple wire separation walls that divide the inner space of the outer shell into multiple accommodating spaces. Each wire pair is accommodated in a separate space, preventing them from warping in different directions and maintaining uniform distance between wires, thus improving electric properties without significantly increasing overall complexity.
Solution Approach 2:
The wire separation walls are twisted in the axial direction of the outer shell, introducing a rotational dimension to the separation structure. This twisting configuration follows the natural twist of the wire pairs, ensuring that wires remain aligned and equidistant along their length, thereby maintaining signal integrity while managing the three-dimensional arrangement of wires.
2Reliability
If twisted wire separation walls are added to maintain uniform wire distance, then electric properties improve, but the shield member structure becomes more complex
Solution Approach 1:
The wire separation walls are integrated into the shield member as a single unified structure rather than separate components. The shield member simultaneously provides electromagnetic shielding and wire separation functions, reducing the total number of parts and simplifying assembly while maintaining the twisted configuration for optimal electric properties.
3Manufacturing precision
If wire separation walls are implemented to prevent wire warping, then insertion loss and reflection loss are reduced, but manufacturing complexity increases
Solution Approach 1:
The shield member is formed as a composite structure integrating conductive shielding material with insulating wire separation walls. This composite design allows the separation walls to be molded as part of the shield member in a single manufacturing process, reducing assembly steps and making the twisted configuration more manufacturable while maintaining precise wire alignment.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
An electrical connector (21) includes: terminal pairs (22) to which wire pairs (4) are attached; a terminal holding part (28) made of insulating material and holding the terminal pairs (22); an outer shell (35) made of electric conductive material and accommodating the terminal holding part (28) and end portions of the wire pairs (4); a fitting part (36) fitted to a counter connector; and a shield member (45) disposed in the outer shell (35) and made of electric conductive material. The shield member (45) includes wire separation walls (53) twisted around the axial center of the shield member (45). The wire separation walls (53) separate the wire pairs (4) for each wire pair (4), and two insulated wires (5) of each wire pair (4) are curved in the same direction as each other.