Electrical Connector Shield Segmentation for Antenna Interference
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Solution Overview
Problem
Electrical connectors face issues with scrapping of the insulative body and antenna interference due to the proximity of metal shields to antennas on printed circuit boards, leading to potential damage and electromagnetic interference.
Innovation Solution
An electrical connector design featuring an insulative body with a mating tongue, a reinforcing plate, grounding plates, and a metal shell with arc portions that engages with a mating plug connector, reducing interference by minimizing the metal shell's length and positioning it away from the antenna, while the reinforcing plate and grounding plates enhance structural integrity and grounding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the metal shield is extended to provide structural support and engagement, then the structural strength is improved, but the antenna interference increases due to closer proximity to the antenna
Solution Approach 1:
The metal shield is segmented into a first metal shield portion and a second metal shield portion, with the insulative body positioned between them. This segmentation allows the shield to provide structural support through multiple components while the insulative body acts as a spacer to maintain distance from the antenna, reducing interference.
Solution Approach 2:
The insulative body serves as an intermediary element positioned between the metal shield and the antenna. It provides electrical insulation and physical spacing, allowing the metal shield to maintain its structural function while preventing harmful electromagnetic interference with the antenna.
2Reliability
If the metal shield is positioned close to the printed circuit board for grounding, then the grounding effectiveness is improved, but the antenna interference increases
Solution Approach 1:
Different portions of the metal shield have different functions: the first metal shield portion provides grounding contact with the printed circuit board, while the second metal shield portion is positioned to engage with the insulative body. This local differentiation allows effective grounding while maintaining distance from the antenna through the insulative body spacing.
3Strength
If the insulative body is made robust for structural support, then the mechanical strength is improved, but the scrapping risk increases due to stress concentration
Solution Approach 1:
The engagement structure is segmented between the metal shield portions and the insulative body. The metal shield portions provide the primary engagement and stress-bearing function, while the insulative body provides spacing and insulation, distributing stress and preventing scrapping of the insulative body.
4Object-affected harmful factors
If the metal shield length is reduced to minimize antenna interference, then the antenna interference is reduced, but the structural support capability deteriorates
Solution Approach 1:
The metal shield is divided into two portions that work together with the insulative body. This segmentation allows the total shield length to be reduced for less antenna interference while maintaining structural support capability through the distributed engagement points and the spacing provided by the insulative body.
Data Source
AI summary
An electrical connector (100) includes an insulative body (2), a number of contacts (1), and a metal shell (5). The insulative body includes an upper wall (21), a lower wall (22) opposite to the upper wall, a pair of sidewalls (23), and a rear wall (24) connecting between the upper wall, the lower wall, and the sidewalls for cooperatively defining a receiving space (20). The insulative body has a mating tongue (25) extending forwardly from the rear wall into the receiving space. The contacts are retained in the mating tongue and partly exposed in the receiving space. The metal shell has a pair of arc portions engaging with a mating plug connector. The metal shell is positioned on the upper wall for reducing interference between the metal shell and an antenna mounted on a printed circuit board.