Board-to-Board Connector Grounding Structure for EMI Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-frequency signal transmission in board-to-board connectors leads to increased electromagnetic interference and crosstalk, resulting in unstable signal transmission quality due to high transmission impedance.
Innovation Solution
An electrical connector grounding structure comprising an insulative terminal holder block, conducting terminals, a grounding member, and a shielding shell that forms a common ground loop, with convex contact points and inner shell contact pieces to enhance grounding and conduction paths, effectively filtering out electromagnetic wave and crosstalk interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If board-to-board connectors transmit high-frequency signals, then signal transmission speed increases, but electromagnetic interference and crosstalk increase resulting in unstable signal quality
Solution Approach 1:
The patent converts the harmful electromagnetic interference and crosstalk generated during high-frequency signal transmission into beneficial grounding paths. The shielding shell and grounding member structure provides dedicated paths that guide the interfering signals to ground, transforming the harmful EMI and crosstalk into controlled current flows that are safely dissipated, thereby maintaining signal transmission stability at high frequencies
Solution Approach 2:
The patent introduces a shielding shell and grounding member as intermediary elements between the signal transmission paths and the external environment. These intermediaries act as barriers that block electromagnetic interference and provide controlled coupling paths for crosstalk, mediating the interaction between adjacent signal lines and preventing direct interference while maintaining high-frequency signal transmission
2Reliability
If traditional connector structures are used, then device complexity is low, but electromagnetic wave interference and crosstalk interference cannot be effectively suppressed
Solution Approach 1:
The patent merges the grounding function with the existing connector structure by integrating a grounding member into the terminal holder block and combining it with a shielding shell. This integration allows the grounding functionality to be incorporated without adding separate, independent grounding systems, thereby improving noise filtering capability while controlling the increase in device complexity through functional consolidation
Solution Approach 2:
The shielding shell and grounding member structure serves multiple functions simultaneously: it provides electromagnetic shielding, establishes grounding paths, reduces crosstalk between adjacent terminals, and maintains mechanical support for the conducting terminals. This multi-functionality allows the structure to achieve effective EMI and crosstalk suppression without proportionally increasing device complexity, as a single structural element performs multiple protective and functional roles
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 significantly improves signal transmission stability by suppressing electromagnetic wave and crosstalk interference, ensuring reliable and stable signal transmission through effective noise filtering and enhanced grounding quality.
Implementation Method 1
the shielding shell comprises an accommodation open chamber that accommodates the electrically insulative terminal holder block... a second contact structure set in contact with the first contact structure... the grounding member is in contact with the shielding shell to form a common ground loop, when the conducting terminals transmit high-frequency signals, the shielding shell will form a good shielding effect
Data Source
AI summary
An electrical connector grounding structure includes an electrically insulative terminal holder block having a rectangular base, a mating structure and a fixing structure, conducting terminals positioned in the rectangular base with contact tips thereof extended to the mating structure and connection tips thereof bonded to a predetermined circuit board, a grounding member having a first contact structure, a positioning structure positioned in the fixing structure and a bonding structure bonded to the circuit board, and a shielding shell covering the electrically insulative terminal holder block and having a second contact structure set in contact with the first contact structure to form a ground loop that guides out electromagnetic waves and crosstalk interference generated during signal transmission.