Ground Plates in Electrical Connector Leadframes
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Solution Overview
Problem
Electrical connectors face significant crosstalk issues due to close spacing of signal contacts, which compromises signal integrity, especially in high-speed electrical systems with smaller footprints and higher operating frequencies.
Innovation Solution
Incorporating ground plates into the electrical contacts of leadframe assemblies within the connector housing to provide a shielding effect, reducing crosstalk by creating a low impedance path to ground and capturing fringe fields between adjacent differential signal pairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal contacts are spaced closely together to reduce connector footprint, then the overall space occupied by the connector is reduced, but crosstalk between adjacent signal contacts increases
Solution Approach 1:
Ground plates are introduced as intermediary elements positioned between adjacent signal contacts. These ground plates act as mediators that intercept and divert interfering electrical fields to ground, preventing crosstalk while allowing signal contacts to maintain close spacing for reduced connector footprint
Solution Approach 2:
The harmful interfering electrical fields are extracted from the signal path by introducing ground plates that capture and redirect these fields to ground. This removes the crosstalk mechanism while preserving the close spacing arrangement of signal contacts
2Reliability
If ground plates are added to reduce crosstalk, then signal integrity is improved, but device complexity increases
Solution Approach 1:
The ground plates are merged with the signal contact structures, forming integrated assemblies where ground and signal functions are combined in a unified structure. This reduces overall device complexity while maintaining improved signal integrity through the ground shielding effect
3Object-generated harmful factors
If ground plates protrude from electrical contacts along the column direction, then shielding effect is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The ground plates are segmented into discrete portions associated with specific signal contacts, with each ground plate positioned independently along the column direction. This segmentation allows for optimized shielding effectiveness while managing manufacturing precision requirements through modular positioning
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 introduction of ground plates effectively reduces crosstalk by acting as a shielding mechanism, maintaining signal integrity and allowing for closer spacing of signal contacts without compromising performance.
Implementation Method 1
Incorporating ground plates into the electrical contacts of leadframe assemblies within the connector housing to provide a shielding effect, reducing crosstalk by creating a low impedance path to ground and capturing fringe fields between adjacent differential signal pairs
Data Source
AI summary
An electrical connector and leadframe assemblies for use therein are provided. Each leadframe assembly can be constructed with at least one electric contact having a ground plate. A first type of leadframe assembly includes an uppermost electrical contact defining a ground plate. A second type of leadframe assembly includes a lowermost electrical contact defining a ground plate. The ground plates can reduce the level of crosstalk exhibited by the electrical connector.