Anti-EMI Block Shielding for High-Density Connectors
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Solution Overview
Problem
Current high-speed, high-density connectors, such as zQSFP connectors, face challenges in effectively resisting electromagnetic interference (EMI) with existing metal shielding technologies.
Innovation Solution
A pluggable connector design incorporating an anti-EMI block with an insulating base, terminal assemblies, and a shielding case, featuring an anti-EMI block with grounding sheets and L-shaped grounding arms, enhances EMI shielding capabilities by forming grounding paths and providing additional shielding layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal shell is used for shielding electromagnetic interference, then the connector has basic EMI shielding capability, but the anti-electromagnetic interference capability is insufficient for high-speed, high-density connectors
Solution Approach 1:
The shielding structure is divided into multiple segments: a metal shell forming an outer shielding layer, and an anti-EMI block with grounding sheets forming an inner shielding layer. This segmented approach allows each layer to perform specific EMI shielding functions, improving overall effectiveness while maintaining manageable complexity through modular design
Solution Approach 2:
The anti-EMI block with grounding sheets is nested inside the metal shell structure. The inner anti-EMI block is positioned within the outer metal shell, creating a nested shielding configuration where the inner layer provides additional EMI protection for critical signal areas while the outer layer provides general shielding
2Speed
If the connector density is increased to achieve high-speed data transfer, then the data transfer rate improves, but the ability to resist electromagnetic interference deteriorates
Solution Approach 1:
Grounding sheets are strategically placed in specific locations where EMI protection is most critical for high-speed signals. The anti-EMI block positioning and grounding sheet distribution are optimized to provide enhanced local shielding around signal terminals and high-frequency signal paths, addressing EMI susceptibility at critical points rather than uniformly throughout the connector
Solution Approach 2:
The shielding protection is extended from a single-dimensional metal shell to a multi-dimensional configuration by adding the anti-EMI block with grounding sheets that create additional shielding planes and pathways. This multi-layered approach adds dimensional complexity to the shielding structure, providing more comprehensive EMI protection for high-density signal arrangements
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 design significantly improves the connector's ability to resist electromagnetic interference, ensuring reliable data transfer at high speeds and densities by effectively shielding against electromagnetic interference.
Implementation Method 1
an upper grounding sheet embedded in the upper horizontal board, a lower grounding sheet embedded in the lower horizontal board, and an upright grounding sheet connecting the upper grounding sheet and the lower grounding sheet
Implementation Method 2
The insulating base has an upper bracket extending horizontally and a lower bracket being located under the upper bracket. The anti-EMI block is mounted between the upper bracket and the lower bracket
Data Source
AI summary
A pluggable connector with anti-electromagnetic interference capability is disclosed in this invention, which includes a socket housing, multiple terminal assemblies and a shielding case. The socket housing includes an insulating base and an anti-EMI block. The insulating base and the anti-EMI block can be combined together to form an upper circuit board slot and a lower circuit board slot. These terminal assemblies are mounted in the socket housing and include multiple signal terminal assemblies and multiple ground terminal assemblies, which are arranged side by side in the order of ground-signal-signal. The shielding case has an upper port and a lower port, which are respectively aligned with the upper circuit board slot and the lower circuit board slot. The pluggable connector of the present invention has a good anti-electromagnetic interference capability by an anti-EMI block.