Modular PCB Wafer Connector Shielding for Low Cross-Talk
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Solution Overview
Problem
The increasing complexity of electronic components and reduced spacing between terminals in connectors necessitate connectors that can handle higher speeds with minimal cross-talk and maintain signal integrity, while existing technologies struggle to optimize impedance and reduce cross-talk effectively.
Innovation Solution
A modular connector design featuring a circuit board with signal pathways and strategically positioned ground pathways, where vias connect the ground pathways on opposite surfaces to form cavities around signal pathways, providing optimized electrical shielding and impedance control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the spacing between electrical terminals is reduced to fit more components in less space, then the component density increases, but the cross-talk between signal pathways increases and signal integrity deteriorates
Solution Approach 1:
The connector is divided into multiple independent modules, each handling specific signal pathways. This segmentation allows for better control of electromagnetic fields within each module, reducing cross-talk between adjacent signal pathways while maintaining high component density.
Solution Approach 2:
Ground pathways are introduced as intermediary elements between signal pathways. These ground pathways act as shields that block electromagnetic interference between adjacent signals, effectively reducing cross-talk without requiring increased spacing between terminals.
2Speed
If the number of electrical terminals is increased to handle higher speeds, then the signal processing capability improves, but the impedance control becomes more difficult and cross-talk increases
Solution Approach 1:
Different regions of the connector are designed with different ground pathway configurations tailored to local signal requirements. This allows for optimized impedance control in each specific area, enabling high-speed signal transmission while maintaining precise impedance matching throughout the connector.
Solution Approach 2:
The design allows for adjustment of ground pathway spacing and positioning to optimize impedance characteristics. By varying these parameters locally, the connector can maintain consistent impedance control even as the number of terminals increases for higher speed applications.
3Reliability
If shielding is added to preserve signal integrity and minimize cross-talk, then the signal quality improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The ground pathways serve dual functions: they provide shielding for signal integrity while simultaneously acting as reference planes for impedance control. This merging of functions reduces the need for separate shielding structures, thereby reducing overall device complexity while maintaining signal quality.
Solution Approach 2:
The ground pathways are designed to perform multiple functions including shielding, impedance reference, and signal return paths. This multi-functionality eliminates the need for additional dedicated shielding elements, reducing manufacturing complexity while preserving signal integrity.
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 design effectively reduces cross-talk and maintains consistent impedance, ensuring signal integrity and improved electrical characteristics even at higher speeds, within a compact connector footprint.
Implementation Method 1
Vias extend from the first plurality of ground pathways through the circuit board to the second plurality of ground pathways, thereby placing the first plurality of ground pathways in electrical engagement with the second plurality of ground pathways
Implementation Method 2
The first plurality of ground pathways, the vias and the second plurality of ground pathways extend along multiple pairs of the plurality of signal pathways and form cavities around the multiple pairs of the plurality of signal pathways to provide electrical shielding
Data Source
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AI summary
A circuit board or module (40) for use in a modular electrical connector (14). Signal pathways (47) are provided on a first surface (55). First ground pathways (51) are provided on the first surface (55) adjacent at least one of the signal pathways (47). Second ground pathways (56) are provided on a second surface (57) in line with the signal pathways (47). Vias (58) extend from the first ground pathways (51) through the module (40) to the second ground pathways (56), thereby placing the first ground pathways (51) in electrical engagement with the second ground pathways (56). The first ground pathways (51), the vias (58) and the second ground pathways (56) extend along multiple pairs of the signal pathways (47) and form cavities around the multiple pairs of the signal pathways (47) to provide electrical shielding for the multiple pairs of the signal pathways (47).