SFP Transceiver Front Plate Shielding Electromagnetic Interference
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Solution Overview
Problem
Conventional SFP transceivers experience significant electromagnetic interference at the end portion with electrical signal connectors, which is not effectively shielded by the metallic housing.
Innovation Solution
The SFP transceiver design incorporates a metallic layer with plastic structures that separate the electrical signal connectors from the metallic layer, reducing electromagnetic interference by using a housing with a front plate that includes a metallic layer and plastic structures, and an unlocking assembly to enhance electromagnetic shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a metallic housing is used to shield electromagnetic interference, then electromagnetic shielding is improved, but the end portion with electrical signal connectors still experiences serious electromagnetic interference
Solution Approach 1:
The patent applies local quality by making the front plate composite (metallic layer + plastic layer) rather than uniformly metallic, with the plastic layer specifically positioned at the connector interface to provide localized electromagnetic interference protection where it is most needed, while maintaining signal transmission quality
Solution Approach 2:
The front plate is constructed as a composite structure combining a metallic layer for electromagnetic shielding and a plastic layer for additional isolation and connector support, creating a multi-material solution that addresses both shielding and signal integrity requirements
2Object-affected harmful factors
If a composite front plate with plastic structures is used to reduce electromagnetic interference, then electromagnetic shielding is improved, but the device complexity increases
Solution Approach 1:
The patent merges the electromagnetic shielding function and the connector support function into a single composite front plate structure, where the metallic layer provides shielding and the plastic layer provides both structural support and additional isolation, eliminating the need for separate components
3Object-affected harmful factors
If plastic structures are added to separate connectors from the metallic layer, then electromagnetic interference is reduced, but manufacturing complexity increases
Solution Approach 1:
The front plate is manufactured as a composite structure with a metallic layer and a plastic layer bonded together, allowing for integrated production that reduces the number of assembly steps while maintaining the electromagnetic interference shielding and isolation functions
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 effectively reduces external electromagnetic interference, improving signal transmission performance and structural strength while maintaining easy insertion and removal from electrical connection slots.
Implementation Method 1
The front plate includes a metallic layer substantially defining a main surface thereof and two plastic structures connected to the metallic layer... effectively reducing an external electromagnetic interference by the arrangement of the metallic layer and the plastic structures
Data Source
AI summary
A small form-factor pluggable transceiver includes a housing, which includes an upper cover, a lower cover fastened to the upper cover, and a front plate arranged between an end of the upper cover and an end of the lower cover. The front plate, the upper cover, and the lower cover are assembled together so as to jointly define an accommodating space. The front plate includes a metallic layer defining a main surface thereof and two plastic structures connected to the metallic layer. The front plate has two through holes penetrating through the metallic layer for respectively accommodating two electrical signal connectors, and the two plastic structures are respectively arranged in the two through holes. When the two electrical signal connectors are respectively disposed in the two through holes, the plastic structures are arranged between the metallic layer and the electrical signal connectors separated from the metallic layer.