High-Density Cable Connector Shielding Plate Crosstalk Reduction
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Solution Overview
Problem
High-frequency electronic signal transmission in connectors is hindered by crosstalk-induced noise due to the increased density of conductive contacts, which results in reduced connector size and larger impedance variations, affecting signal quality.
Innovation Solution
A high-density cable end connector design featuring a shielding plate between conductive contacts, connected to a printed circuit board and surrounded by a shielding shell, which grounds and removes charges through multiple paths to reduce noise from crosstalk, thereby enhancing signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the distance between two conductive contacts is reduced to increase contact density, then the connector size is reduced, but crosstalk-induced noise increases due to smaller gaps between contacts
Solution Approach 1:
A shielding plate is introduced as an intermediary component positioned between adjacent conductive contacts. This shielding plate acts as a mediator that blocks electromagnetic field interference between contacts, thereby reducing crosstalk-induced noise while allowing the contacts to maintain small spacing for high-density configuration.
Solution Approach 2:
The harmful electromagnetic fields causing crosstalk are extracted and redirected to ground through the shielding plate. By providing a dedicated path for these interfering fields to discharge to ground, the shielding plate removes the harmful effects from the signal transmission path between contacts.
2Volume of moving object
If the distance between two conductive contacts is reduced to increase contact density, then the connector size is reduced, but signal quality deteriorates due to larger impedance variations
Solution Approach 1:
The shielding plate serves as an intermediary that stabilizes the electromagnetic environment between closely-spaced contacts. By controlling the field distribution and providing consistent shielding, it reduces impedance variations and maintains signal quality despite the reduced contact spacing.
3Productivity
If the frequency of electronic signals is increased to transmit more data, then the data transmission capacity is improved, but crosstalk-induced noise increases affecting signal integrity
Solution Approach 1:
The shielding plate provides frequency-dependent shielding that is particularly effective at blocking high-frequency electromagnetic interference. By positioning the shielding plate between contacts, it mediates the high-frequency signal transmission by blocking crosstalk while allowing the desired high-frequency signals to pass through the controlled impedance path.
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 lowers noise generated by crosstalk, allowing for reliable transmission of high-frequency signals by controlling impedance variations and reducing energy consumption during signal transfer.
Implementation Method 1
A high-density cable end connector includes a first sub-assembly, a second sub-assembly, a printed circuit board, a shielding plate, and a shielding shell. The shielding plate is disposed between the first contacts and the second contacts and fixed to the first insulator or the second insulator.
Implementation Method 2
the shielding plate includes at least one extension portion extending outwards to be in contact with a ground end of the printed circuit board
Data Source
AI summary
A high-density cable end connector for transmitting high-frequency signals includes a first sub-assembly, a second sub-assembly, a printed circuit board, a shielding plate, and a shielding shell. The first sub-assembly includes first contacts, a first insulator, and a first cover body. The second sub-assembly includes second contacts, a second insulator, and a second cover body. The printed circuit board includes pins connected to the first contacts and the second contacts. The shielding shell at least partially surrounds peripheries of the first sub-assembly and the second sub-assembly. The shielding plate is disposed between the first contacts and the second contacts and fixed to the first insulator or the second insulator for insulating the first contacts from the second contacts. Therefore, the high-density cable end connector is prevented from having crosstalk resulted by high frequency signals between the first contacts and the second contacts.