Shielded Connector PCB Layout for Signal Crosstalk Reduction
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Solution Overview
Problem
Conventional electrical connectors experience signal crosstalk during transmission due to inadequate shielding, particularly between the connector and the mating connector, despite the use of electromagnetic shielding members within the cable connectors.
Innovation Solution
The electrical connector design includes a circuit board with ground and signal conductive pads, where the electromagnetic shielding member is connected to a shielding ground conductive pad, which is positioned between the ground and signal pads, effectively reducing crosstalk by enhancing electromagnetic shielding between the connectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional cable connectors use ground terminals and electromagnetic shielding members, then partial shielding is achieved, but crosstalk between cable connector and mating connector cannot be reduced
Solution Approach 1:
The shielding structure is segmented into multiple functional components: ground terminals within the cable connector, electromagnetic shielding members surrounding signal terminals, and shielding ground conductive pads on the circuit board. This segmentation allows each component to address specific aspects of crosstalk reduction, with the shielding ground conductive pad specifically targeting the interface between cable connector and mating connector
Solution Approach 2:
The shielding ground conductive pad extends in the first direction (perpendicular to the arrangement direction of signal terminals) to provide shielding coverage in a previously unaddressed dimensional space. This extension creates an additional shielding layer that bridges the gap between the cable connector and mating connector, addressing crosstalk in the interface region that conventional internal shielding could not protect
2Object-affected harmful factors
If ground terminals are disposed at intervals around signal terminals, then some shielding is provided, but signal terminals still mutually crosstalk
Solution Approach 1:
The invention merges multiple shielding functions into a unified structure: the ground terminals, electromagnetic shielding members, and shielding ground conductive pads work together as an integrated shielding system. The shielding ground conductive pad combines the functions of ground reference and electromagnetic shielding in a single component layer on the circuit board, reducing overall structural complexity while enhancing shielding effectiveness
Solution Approach 2:
The shielding ground conductive pad acts as an intermediary element between the ground terminals and the signal terminals. It provides an additional ground reference plane that mediates electromagnetic interference, creating a more effective shielding barrier without requiring direct modification of the ground terminal arrangement or signal terminal 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
This configuration significantly improves signal transmission performance by minimizing crosstalk between signal terminals, ensuring reliable and interference-free data transfer between the electrical connector and the mating connector.
Implementation Method 1
an electromagnetic shielding member. The electrical connector comprises a circuit board, a plurality of ground conductive pads, a plurality of signal conductive pads, and a shielding ground conductive pad
Data Source
AI summary
An electrical connector connected with a cable connector connected to cables. The cable connector comprises a plurality of ground terminals, a plurality of signal terminals, and an electromagnetic shielding member. The electrical connector comprises a circuit board, a plurality of ground conductive pads, a plurality of signal conductive pads, and a shielding ground conductive pad. The circuit board comprises two electrical connecting areas that are parallel to each other along first direction. The plurality of ground conductive pads are disposed on a surface of the circuit board at intervals. At least one signal conductive pad is disposed between two adjacent ground conductive pads along second direction that is perpendicular to the first direction. Each of the signal conductive pads being directly connected with the corresponding signal terminal and not directly connected to the cables. The shielding ground conductive pad is disposed on the surface of the circuit board.