Electrical Connector Grounding Layout to Prevent Resonance Peak Overlap
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Solution Overview
Problem
Existing electrical connectors experience resonance issues due to symmetrical ground terminals leading to superposition of resonance peaks, which affect signal transmission, particularly in the frequency range of 15-20 GHz.
Innovation Solution
The electrical connector design incorporates a grounding sheet with connecting portions of different structures for the ground terminals, ensuring they have varying distances and surface areas relative to adjacent signal terminals, thereby preventing resonance superposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If symmetrical ground terminals are provided at two sides of signal terminals, then shielding effect is improved, but resonance peaks superpose and resonance increases
Solution Approach 1:
The patent applies asymmetry by providing ground terminals with different structures at the two sides of signal terminals. Specifically, ground terminals at different positions have different distances to adjacent signal terminals and different surface areas of their flat plate sections, breaking the symmetrical resonance pattern. This asymmetric design prevents resonance peaks from superposing at the same frequency, thereby reducing overall resonance while maintaining shielding effectiveness.
Solution Approach 2:
The patent implements local quality by making each ground terminal have different local characteristics based on its position. The flat plate section area and distance to signal terminals are locally adjusted for each ground terminal rather than using uniform structures throughout. This localized differentiation ensures that each ground terminal interacts with signal terminals in a unique way, preventing uniform resonance patterns and reducing peak superposition.
2Ease of manufacture
If ground terminals are made identical in structure, then manufacturing is simplified, but resonance frequencies coincide and peak superposition occurs
Solution Approach 1:
The patent introduces asymmetry in ground terminal dimensions while maintaining manufacturability. By specifying that ground terminals have different flat plate section areas or different distances to signal terminals, the design creates natural frequency differentiation without requiring complex assembly procedures. The asymmetry is built into the basic terminal structure, keeping manufacturing relatively simple while achieving the desired resonance frequency distribution.
3Reliability
If connecting portions have different structures, then resonance superposition is prevented, but device complexity increases
Solution Approach 1:
The patent applies local quality by differentiating only specific portions of the grounding structure - namely the flat plate section areas or distances from signal terminals - while keeping other aspects of the grounding sheet uniform. This localized differentiation is sufficient to prevent resonance superposition without requiring complete structural complexity throughout the entire grounding system, thus balancing reliability improvement with manageable device complexity.
Data Source
AI summary
An electrical connector includes a terminal unit. The terminal unit includes at least one signal terminal and a first ground terminal and a second terminal provided to be adjacent to the at least one signal terminal. A first grounding sheet includes a first connecting portion and a second connecting portion. The first connecting portion and the second connecting portion correspondingly connected to the first ground terminal and the second ground terminal at least partially overlap along a left-right direction. A distance between the first connecting portion and a closest signal terminal is not equal to a distance between the second connecting portion and a closest signal terminal, or an area of a surface of each of the first connecting portion and the second connecting portion adjacent to the signal terminal along the left-right direction is not equal. Thus, the superposition issue is prevented when resonant frequencies coincide.