RJ45 Connector Expanded Circuit Board Crosstalk Reduction
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Solution Overview
Problem
The increasing transmission speed of RJ45 connectors exacerbates crosstalk issues, limiting the effectiveness of traditional noise-suppression methods due to space constraints on the circuit board, necessitating innovative solutions to improve signal transmission quality.
Innovation Solution
A connector design featuring an expanded circuit board stacked on a main circuit board with strategically positioned first and second terminals, which are bent to form electrical contacts and limit sections, allowing for efficient noise suppression and crosstalk reduction without requiring welding, thereby enhancing assembly efficiency and connection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If transmission speed is increased to 500MHz, then network performance is improved, but crosstalk interference increases
Solution Approach 1:
The patent introduces a third-dimensional expanded circuit board stacked vertically on the main circuit board, creating additional spatial layers for noise suppression components. This vertical dimension allows placement of resistance and capacitance elements without occupying horizontal board space, enabling effective crosstalk suppression at 500MHz transmission speed.
Solution Approach 2:
The expanded circuit board acts as an intermediary structure between the main circuit board and the housing, providing a dedicated platform for noise suppression components. These components serve as mediators that filter and suppress crosstalk interference, allowing high-speed signal transmission while maintaining signal quality.
2Reliability
If noise-suppression components are added to suppress crosstalk, then transmission quality is improved, but circuit board space is insufficient
Solution Approach 1:
The patent transitions from a two-dimensional circuit board layout to a three-dimensional stacked configuration. The expanded circuit board is positioned vertically above the main circuit board, utilizing the Z-axis dimension to accommodate noise suppression components. This eliminates the space constraint on the horizontal board area while providing sufficient space for resistance and capacitance elements.
Solution Approach 2:
The circuit board system is segmented into two separate boards: the main circuit board for signal routing and the expanded circuit board for noise suppression components. This segmentation allows each board to be optimized for its specific function, with the expanded board dedicated to housing resistance and capacitance elements without interfering with the main board's signal paths.
3Reliability
If traditional assembly methods are used, then connection reliability is achieved, but assembly efficiency is reduced due to welding requirements
Solution Approach 1:
The patent replaces the traditional welding process with a mechanical pressing assembly method. The expanded circuit board is positioned and secured through mechanical insertion and pressing operations, eliminating the need for thermal welding processes. This substitution maintains connection reliability through precise mechanical engagement while dramatically improving assembly efficiency and production speed.
Solution Approach 2:
The expanded circuit board features self-aligning structures and snap-fit connections that enable automatic positioning and securing during assembly. The design incorporates guide rails, positioning pins, and elastic retention mechanisms that allow the board to self-align and self-secure without complex welding fixtures or procedures, further enhancing assembly efficiency.
Data Source
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AI summary
A connector includes an insulated housing having a slot and a transmission assembly located inside the insulated housing. The transmission assembly includes a main circuit board, an expanded circuit board, a plurality of first terminals and at least one second terminal. The expanded circuit board is stacked on the main circuit board and a first lateral side and a second lateral side of the expanded circuit board which are opposite to each other has a plurality of first electrical contacts and at least one second electrical contact, respectively. The first terminals and the at least one second terminal are plugged in the main circuit board. One ends of the first terminals are in electrical contact with the first electrical contacts respectively. The other ends of the first terminals bend and extend towards the second lateral side of the expanded circuit board.