Electrical Connector Grounding Bar Layout for Resonance Suppression
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Solution Overview
Problem
Existing electrical connectors face issues with grounding resonance, which affects signal transmission and causes unwanted resonances and electromagnetic interference, particularly in high-speed communication applications.
Innovation Solution
The use of single grounding bars, strategically placed between adjacent grounding terminals, creates asymmetrical electromagnetic wave reflection points, disrupting resonance conditions and suppressing ground resonance, while maintaining a configuration that allows for efficient signal transmission up to 25 GHz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a common grounding bar connects all grounding terminals together, then grounding resonance frequency is pushed higher, but resonance conditions are still formed causing electromagnetic interference
Solution Approach 1:
The patent divides the grounding terminals into separate groups (first group and second group) with different grounding bar configurations. The first grounding bar connects multiple grounding terminals in the first group, while the second grounding bar connects multiple grounding terminals in the second group. This segmentation prevents the formation of continuous resonance cavities that would occur with a single common grounding bar, thereby reducing electromagnetic interference while maintaining effective grounding.
Solution Approach 2:
The patent employs asymmetric grounding bar arrangements where the first grounding bar and second grounding bar are positioned at different locations and connect different sets of grounding terminals. This asymmetry disrupts the symmetry of potential resonance patterns, making it difficult for resonance conditions to be established across the entire connector structure, thus suppressing electromagnetic interference.
2Object-affected harmful factors
If electrically lossy materials are used to bridge ground terminals, then unwanted resonances are reduced, but signal transmission energy is absorbed and reduced
Solution Approach 1:
Instead of using lossy materials that would uniformly absorb energy, the patent segments the grounding structure into separate grounding bars connecting different groups of grounding terminals. This segmentation allows resonances to be suppressed through structural discontinuity rather than energy absorption, preserving signal transmission energy while still reducing unwanted resonances.
3Object-affected harmful factors
If grounding bars are placed to suppress resonance, then grounding resonance is reduced, but device complexity increases
Solution Approach 1:
The patent uses segmentation to divide grounding terminals into logical groups that can be connected by separate grounding bars. This approach suppresses resonance by breaking up continuous grounding paths while maintaining a relatively simple structure that follows the natural grouping of differential signal pairs and their associated grounding terminals.
Solution Approach 2:
The grounding bars serve multiple functions: they provide electrical connection between grounding terminals, establish reference potential planes for differential signals, and suppress resonance by creating discontinuities in potential distribution. This multi-functionality reduces the need for additional components, thereby limiting the increase in device complexity.
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
This configuration effectively suppresses grounding resonance peaks, resulting in smoother insertion loss and return loss graphs with reduced crosstalk, enhancing the overall performance of electrical connectors in high-speed communication.
Implementation Method 1
electromagnetic waves reflecting points between the middle grounding terminal and the first side grounding terminal are asymmetrical from electromagnetic waves reflecting points between the middle grounding terminal and the second side grounding terminal to destroy a resonance condition of the grounding terminals and suppress corresponding ground resonance
Implementation Method 2
destroy a resonance condition of the grounding terminals and suppress corresponding ground resonance
Data Source
AI summary
An electrical connector includes: an insulative housing loaded with a row of terminals arranged along a lateral direction; and the row of terminals at least comprising plural grounding terminals and a respective pair of differential signal terminals between every two adjacent grounding terminals, wherein selected two adjacent grounding terminals are bridged with a single grounding bar and constructed as a coupling grounding pair, while every adjacent coupling grounding pair are separated from each other.