Shielded Signal Connector Cavity for Differential Crosstalk Control
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Solution Overview
Problem
Current signal connectors with a single metal shielding piece fail to effectively reduce signal crosstalk and improve signal integrity due to limitations in shielding structure and increased complexity in design, especially when differential signal terminals are placed near the edge of the shielding piece.
Innovation Solution
A signal connector design featuring a backplane connection part with a first shielding piece and a subcard connection unit with a second shielding piece, forming a shielding cavity around signal terminal pairs to prevent crosstalk, while also incorporating protrusions for enhanced signal return paths and reduced assembly complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate ground shielding module is designed, then the shielding effect and return path are improved, but the connector size doubles and assembly complexity increases
Solution Approach 1:
The patent combines the ground shielding module with the signal module into a single integrated connector structure. The housing simultaneously provides both signal transmission pathways and ground shielding functions, eliminating the need for separate shielding components while maintaining effective electromagnetic shielding and return paths.
Solution Approach 2:
The connector housing is designed to serve multiple functions: it provides mechanical support, establishes electrical connections for signal transmission, and simultaneously creates ground shielding cavities. This multi-functional design allows the same structure to fulfill both signal coupling and shielding requirements without increasing overall complexity.
2Reliability
If a separate ground shielding module is designed, then the shielding effect is improved, but the connector size doubles
Solution Approach 1:
The patent merges the ground shielding module with the signal module into a single integrated connector structure. The housing simultaneously provides both signal transmission pathways and ground shielding functions, eliminating the need for separate shielding components while maintaining effective electromagnetic shielding and return paths.
3Volume of moving object
If differential signal terminals are placed near the edge of the shielding piece, then the connector size is reduced, but signal coupling between different terminal pairs occurs
Solution Approach 1:
The patent implements localized ground shielding cavities around each differential signal terminal pair. Each terminal pair is surrounded by its own dedicated shielding structure formed by the housing, ensuring that even when terminals are positioned near edges, the local electromagnetic field is contained and signal coupling between adjacent pairs is prevented.
Solution Approach 2:
The shielding structure is segmented into individual cavities for each signal terminal pair. This segmentation allows each pair to be independently shielded, preventing interference between adjacent pairs while maintaining compact overall dimensions. The housing creates discrete enclosed spaces that isolate electromagnetic fields.
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 proposed design effectively reduces signal crosstalk and improves signal integrity by creating a shielding cavity around signal terminal pairs and increasing the signal return path, while simplifying the assembly process and reducing the overall size of the connector.
Implementation Method 1
the first shielding piece cooperates with the second shielding piece in the one-to-one manner, to form a shielding cavity in which the first signal terminal pair and the second signal terminal pair are wrapped
Data Source
AI summary
A signal connector includes a backplane connection part and a subcard connection unit. A first signal terminal pair and a first shielding piece are disposed on the backplane connection part. A second signal terminal pair and a second shielding piece are disposed on the subcard connection unit. When the backplane connection part and the subcard connection unit cooperate with each other, the first signal terminal pair is combined with the second signal terminal pair in a one-to-one manner. The first shielding piece and the second shielding piece form a shielding cavity in which the first signal terminal pair and the second signal terminal pair are wrapped.