Backplane Connector Shielding Plate for Differential Pair Crosstalk
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Solution Overview
Problem
High-speed signal transmission in communication equipment leads to interference and crosstalk due to distributed capacitance and inductance between adjacent differential signal terminals, which existing backplane connectors fail to adequately address.
Innovation Solution
A shielding plate with alternately arranged concave and convex strips, integrated with a terminal module and high-speed backplane connector, provides effective grounding and shielding through a unique fixing structure and conductive spacers, forming a complete shielding structure around differential signal terminals to reduce interference and crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-speed signal transmission is implemented, then transmission speed is improved, but electromagnetic interference and crosstalk between adjacent differential signal terminals increases
Solution Approach 1:
The shielding plate is divided into multiple concave strips and convex strips that are alternately arranged. Each convex strip serves as an independent shielding unit surrounding a pair of differential signal terminals, while concave strips create separation between adjacent signal pairs. This segmentation approach allows high-speed transmission while isolating electromagnetic fields between adjacent terminals.
Solution Approach 2:
The shielding structure implements local quality by providing targeted electromagnetic shielding only where needed - around each differential signal terminal pair using convex strips. The grounding pins are strategically positioned at specific locations where electromagnetic interference is most problematic, creating localized shielding zones rather than uniform shielding across the entire connector.
2Object-affected harmful factors
If shielding structure is added to reduce interference, then electromagnetic shielding is improved, but device complexity increases
Solution Approach 1:
The shielding plate integrates multiple functions into a single component: electromagnetic shielding, grounding, and structural support. The convex strips provide shielding while the integrated grounding pins combine shielding and grounding functions in one element, reducing the need for separate shielding components and simplifying the overall device structure.
Solution Approach 2:
The shielding plate serves multiple purposes simultaneously: the convex strips shield differential signal terminals from electromagnetic interference, the grounding pins provide electrical grounding, and the alternating concave-convex pattern creates both shielding and separation. This multi-functionality reduces device complexity by eliminating the need for separate shielding and grounding components.
3Reliability
If grounding pins are integrated into concave strips, then grounding effect is improved, but manufacturing precision requirements increase
Solution Approach 1:
The grounding pins are integrally formed with the concave strips as a single piece, combining grounding and shielding functions in one component. This integration ensures reliable electrical connection between the shielding structure and ground, while the integral construction reduces assembly steps and potential connection failures.
Solution Approach 2:
The grounding pins are pre-positioned and integrally formed with the concave strips during manufacturing, ensuring precise alignment before the shielding plate is assembled into the connector. This preliminary positioning eliminates the need for post-assembly adjustments and ensures consistent grounding effectiveness.
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 electromagnetic interference and crosstalk between adjacent differential signal terminals by forming a stable grounding connection and complete shielding structure, enhancing the reliability of high-speed signal transmission.
Implementation Method 1
each of the concave strips protrudes downwardly at the bottom edge with a grounding pin, and the grounding pins are arranged in a row
Implementation Method 2
the shielding plate comprises alternately arranged a plurality of concave strips and a plurality of convex strips; the convex strips are protruded from the shielding inner wall to the shielding outer wall
Data Source
AI summary
The present application discloses a shielding plate, a terminal module, a high-speed backplane connector, and a connector system. The shielding plate is provided with an ingenious grounding structure, such as alternately arranged concave strips and convex strips, and has a good grounding function. The high-speed backplane connector provided in the present application includes a plurality of terminal modules and an insulative shell for receiving the terminal modules. Each terminal module includes a plurality of pairs of differential signal terminals arranged in a terminal row, a plurality of conductive spacers arranged in the terminal row at intervals, and a shielding plate; the shielding plate is fixed on one side of a fixing frame and connected with the conductive spacers; the pair of differential signal terminals can be shielded by arranging the concave strips and the convex strips, effectively reducing interference and crosstalk between the adjacent pairs of differential signal terminals.