Electrical Connector Ground Bar and Shielding for Crosstalk Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrical connectors for high-frequency transmission lack an effective grounding member that can efficiently reduce signal crosstalk and ensure reliable common grounding.
Innovation Solution
The electrical connector features a metallic ground bar unitarily formed from a single piece, integrating the grounding contacts, and a shielding member welded to the ground bar, providing enhanced grounding and shielding for differential-pair contacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional grounding members are used in electrical connectors, then the connector can be manufactured with simpler processes, but signal crosstalk between differential-pair contacts increases and common grounding reliability deteriorates
Solution Approach 1:
The patent combines multiple grounding contacts into a single unitary metallic ground bar structure. The ground bar integrally connects all grounding contacts through a continuous metallic body, ensuring common grounding potential across all contacts while reducing the number of separate grounding components needed. This merging approach improves grounding reliability by eliminating potential isolation between separate grounding elements.
Solution Approach 2:
The shielding member acts as an intermediary element positioned between adjacent differential-pair contacts. This metallic shielding barrier intercepts and redirects electromagnetic fields, preventing direct coupling between adjacent signal pairs. The shielding member is electrically connected to the ground bar, providing a controlled path for interference currents and effectively reducing signal crosstalk.
2Strength
If multiple separate grounding contacts are used, then the manufacturing process is simpler, but the structural strength decreases and warping due to heat occurs
Solution Approach 1:
The grounding contacts are merged into a single unitary metallic ground bar structure formed from one continuous piece of metal. This integration provides substantial structural strength and rigidity to the connector assembly, preventing warping during heat treatment or operation. The continuous metallic structure distributes mechanical stresses and thermal expansion uniformly, eliminating the weakness associated with multiple separate grounding components.
3Reliability
If shielding members are not used, then the device complexity is reduced, but signal crosstalk between differential-pair contacts increases
Solution Approach 1:
The shielding member serves as a metallic intermediary barrier positioned between adjacent differential-pair contacts. This shielding element intercepts electromagnetic fields generated by one signal pair before they can couple into adjacent pairs, effectively reducing signal crosstalk. The shielding member is electrically connected to the ground bar, providing a controlled impedance path for interference currents and maintaining signal integrity without requiring complex active shielding systems.
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 reduces signal crosstalk between differential-pair contacts, ensures reliable common grounding, and enhances the structural strength of the connector, preventing warping due to heat.
Implementation Method 1
a shielding member secured to a center of the mating tongue and located between the two sets of contacts in a front-to-back direction and welded to the metallic ground bar
Data Source
AI summary
An electrical connector includes an insulative housing including a pair of side walls and a mating tongue located between the pair of side walls. Two sets of contacts are disposed at two opposite sides of the mating tongue, each set of contacts including plural differential-pair contacts and plural grounding contacts alternately arranged with each other along a transverse direction. A metallic ground bar is unitarily formed of a single piece and has a base connecting to the two sets of grounding contacts. A shielding member is secured to a center of the mating tongue and is electrically connected to the metallic ground bar.