Connector Shielding Cavity Layout for High-Speed Crosstalk Control
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Solution Overview
Problem
Existing high-speed connectors suffer from severe crosstalk between signals due to structural limitations of the grounding shielding board, affecting data transmission rate and quality, especially at high data rates like 56 Gbps.
Innovation Solution
The connector design includes a plurality of shielding boards around the signal terminal, each connected to a peer shielding board via contact units, forming a shielding structure with sufficient signal return paths, using rigid or elastic contact units to ensure reliable electrical connections and optimize crosstalk performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a grounding shielding board is used in existing high-speed connectors, then the connector structure is simple, but severe crosstalk occurs between signals affecting data transmission rate and quality
Solution Approach 1:
The shielding board is segmented into multiple independent shielding boards (first shielding board, second shielding board, third shielding board, fourth shielding board) that are arranged around the signal terminal. Each shielding board can be independently connected to the peer shielding board, creating multiple separate shielding paths that effectively reduce crosstalk while maintaining manageable structural complexity
Solution Approach 2:
The shielding structure transitions from a single-plane grounding board to a three-dimensional arrangement where shielding boards are positioned around the signal terminal in multiple directions. This spatial distribution creates comprehensive shielding coverage and multiple return paths, reducing crosstalk by utilizing dimensional space more effectively
2Reliability
If multiple shielding boards are arranged around the signal terminal, then crosstalk performance is optimized, but the connector structure becomes more complex
Solution Approach 1:
Multiple shielding boards are merged into an integrated shielding structure that works together as a unified system. The shielding boards are connected to each other and to the peer shielding board through contact units, creating a combined shielding effect that improves signal transmission quality while the modular design keeps the overall structure manageable
Solution Approach 2:
Each shielding board is positioned at specific locations around the signal terminal to provide localized shielding where crosstalk is most problematic. The contact units are strategically placed to ensure reliable electrical connections at critical points, optimizing shielding effectiveness without requiring complex structures throughout the entire connector
3Reliability
If contact units are added to ensure reliable electrical connection between shielding boards, then shielding effectiveness is improved, but manufacturing complexity increases
Solution Approach 1:
The contact units are designed to automatically make electrical connections between shielding boards when the connector components are assembled. The elastic contact units can self-adjust to ensure reliable contact without requiring precise manual alignment or additional fastening steps, improving reliability while simplifying the manufacturing process
Solution Approach 2:
The contact units utilize elastic properties to create reliable electrical connections. By changing from rigid contacts to elastic contacts, the system achieves reliable electrical connection through material property selection rather than complex mechanical arrangements, improving reliability while maintaining ease of manufacture
Data Source
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 arranged in an array manner, where the first terminal module includes a shielding unit and a first signal terminal, and the shielding unit includes a plurality of shielding boards that are sequentially connected to form a shielding cavity. A first surface of the shielding board back to the shielding cavity is used to cooperate with a peer shielding board of a paired connector, and a contact unit protruding from the first surface is further disposed on the shielding board. The contact unit is configured to electrically connect to the peer shielding board of the paired connector, and the first signal terminal is located in the shielding cavity.