Connector Shielding Cavity Structure for High-Speed Signal Crosstalk
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Solution Overview
Problem
Existing high-speed connectors suffer from severe crosstalk between signals due to structural limitations in grounding shielding, affecting data transmission rate and quality, particularly at high data rates like 56 Gbps.
Innovation Solution
The connector design includes a plurality of shielding boards around signal terminals, each connected to peer shielding boards via contact units, forming sufficient signal return paths and a shielding structure to optimize crosstalk performance. Contact units can be rigid or elastic, with specific dimensions to minimize path length and enhance electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional grounding shielding structure is used, then connector structure is simple, but severe crosstalk between signals occurs affecting data transmission rate and quality
Solution Approach 1:
The shielding board is divided into multiple independent shielding units, each corresponding to a signal terminal. Each shielding unit includes first and second shielding boards with contact units that can be independently adjusted, allowing precise control of shielding performance for each signal pair without increasing overall structural complexity
Solution Approach 2:
The contact units are designed with elastic properties, allowing them to dynamically adjust their position and contact pressure. This dynamic capability enables the shielding structure to adapt to manufacturing tolerances and assembly variations while maintaining effective electrical connection and shielding performance
2Reliability
If shielding boards are added around signal terminals, then crosstalk performance is improved, but connector structure becomes more complex
Solution Approach 1:
The first and second shielding boards are integrated into a unified shielding unit structure that combines shielding, grounding, and positioning functions. The contact units serve dual purposes by providing both electrical connection and mechanical positioning, reducing the number of separate components needed
Solution Approach 2:
The shielding boards serve multiple functions: providing electromagnetic shielding, establishing electrical ground connections through contact units, and offering mechanical support and positioning for signal terminals. This multi-functionality reduces the need for additional separate components
3Reliability
If contact units are made elastic to ensure reliable electrical connection, then connection reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The contact units are designed with optimized elastic parameters including specific thickness (0.05-0.15mm), width (0.2-0.5mm), and length (1-3mm) ranges. These parameter specifications provide sufficient elastic compliance to accommodate manufacturing variations while maintaining reliable electrical connection, reducing the stringency of precision requirements
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 solution effectively reduces crosstalk resonance, increasing the frequency at which crosstalk occurs from 20 GHz to about 25 GHz, supporting data transmission rates up to 56 Gbps and beyond with improved signal quality.
Implementation Method 1
a plurality of shielding boards (21), which are sequentially connected to form a shielding cavity (22), in which the first signal terminal (10) is located
Implementation Method 2
a contact unit protruding from the first surface (211) may be disposed on the shielding board (21). The shielding board (21) may specifically implement the electrical connection to the peer shielding board by using the contact unit
Data Source
Figure 1
Figure 2~4
Figure 5~6
AI summary
A connector, a connector assembly, and an electronic device are provided to improve crosstalk phenomenon between signals and optimize signal transmission performance. The connector includes a plurality of first terminal modules (200) arranged in an array manner, where the first terminal module (200) includes a shielding unit (20) and a first signal terminal (10), and the shielding unit (20) includes a plurality of shielding boards (21) that are sequentially connected to form a shielding cavity (22). A first surface (211) of the shielding board (21) back to the shielding cavity (22) is used to cooperate with a peer shielding board (51) of a paired connector, and a contact unit (30) protruding from the first surface (211) is further disposed on the shielding board (21). The contact unit (30) is configured to electrically connect to the peer shielding board (51) of the paired connector, and the first signal terminal (10) is located in the shielding cavity (22).