Telecommunications Jack Crosstalk Reduction via Segmented PCB
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Solution Overview
Problem
Existing telecommunications jacks, particularly RJ45 connectors, experience significant crosstalk issues as operating frequencies increase, which can interfere with data transmission, and current solutions to mitigate this often result in complex or difficult-to-assemble contact shapes or inconsistent plug engagement.
Innovation Solution
A telecommunications jack design featuring a first supporting printed circuit board with front contacts divided into signal and non-signal path sections, accompanied by a second compensating PCB with electrical components strategically connected to both sections of the front contacts to reduce crosstalk, offering a simpler and cost-effective arrangement compared to prior art.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the shape of front contacts is modified to reduce crosstalk, then crosstalk between wire pairs is reduced, but the contact shape becomes complicated and difficult to assemble
Solution Approach 1:
The patent divides the front contact into two distinct sections: a signal path section that makes contact with the mating plug, and a non-signal path section that extends backward. This segmentation allows the contact to have a simplified overall shape while still achieving crosstalk reduction through the specific configuration of the signal path section.
Solution Approach 2:
The patent extracts the crosstalk-reducing functionality from the overall contact shape by creating a specific configuration only in the signal path section, while the non-signal path section maintains a simple, standardized shape for easy assembly and compatibility.
2Object-affected harmful factors
If the shape of front contacts is modified to reduce crosstalk, then crosstalk between wire pairs is reduced, but engagement with mating plugs becomes inconsistent
Solution Approach 1:
By segmenting the contact into signal path and non-signal path sections, the patent ensures that only the signal path section has modified geometry for crosstalk reduction, while the non-signal path section maintains standard dimensions that ensure consistent engagement with various mating plugs.
Solution Approach 2:
The patent applies local quality by modifying only the specific region (signal path section) where crosstalk occurs, while keeping the rest of the contact (non-signal path section) with uniform properties that ensure reliable mechanical engagement.
3Object-affected harmful factors
If multiple PCBs with compensation components are added to reduce crosstalk, then crosstalk is reduced, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the crosstalk compensation functionality into a single second PCB that electrically connects to both the signal path section and non-signal path section of the front contacts. This consolidation achieves effective crosstalk reduction while avoiding the complexity of multiple separate compensation PCBs.
Solution Approach 2:
The second compensating PCB serves multiple functions: it provides crosstalk compensation for both signal path and non-signal path sections, and it electrically connects both sections together. This multi-functionality reduces the overall device complexity compared to separate compensation mechanisms.
4Object-affected harmful factors
If multiple PCBs with compensation components are added to reduce crosstalk, then crosstalk is reduced, but manufacturing cost increases
Solution Approach 1:
The patent combines crosstalk compensation for multiple contact sections into a single second PCB, reducing the total number of components that need to be manufactured, assembled, and tested, thereby lowering manufacturing costs while maintaining effective crosstalk reduction.
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 effectively reduces crosstalk between wire pairs, maintains consistent plug engagement, and ensures reliable signal transmission across varying frequencies while being more cost-effective and easier to manufacture.
Implementation Method 1
A second compensating PCB with electrical compensation components for reducing crosstalk is provided in the jack
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
The invention refers to a telecommunications jack (1) for making electrical connection to a mating plug (5), wherein the jack and the plug may - when connected with each other - exchange electrical signals, the electrical signals travel along a signal path through the jack and the plug. The telecommunications jack according to the invention comprises: - a first supporting printed circuit board (16) holding - an array of front contacts (12), connectable to telecommunication wires, - the front contacts comprising a section that is lying within the signal path and a section that is lying outside the signal path, - a second compensating printed circuit board (17) comprising electrical compensation components for reducing crosstalk, - at least one of the electrical compensation components of the second printed circuit board is electrically connected to at least one of the front contacts in the section that is lying within the signal path and - at least another one of the electrical compensation components of the second printed circuit board is electrically connected to at least one of the front contacts in the section that is lying outside of the signal path.