Shielded Electrical Plug Connector Dome Contact EMI Leakage
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Solution Overview
Problem
Conventional electrical connectors face challenges in reducing electromagnetic interference (EMI) and radio frequency interference (RFI) due to inadequate shielding, especially as devices become smaller and signal transmission speeds increase, leading to unwanted noise and crosstalk.
Innovation Solution
The design incorporates a shielded electrical plug connector with conductive contact members featuring dome-shaped contact portions that establish a low-impedance grounding path between the metallic shells of the plug and receptacle connectors, enhancing EMI and RFI shielding by deflecting inward to cover holes and attenuate leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the metallic shell uses conventional stamped spring fingers, then the structure is simple and easy to manufacture, but EMI shielding is inadequate and EMI leakage occurs
Solution Approach 1:
The shielding function is segmented into multiple components: the metallic shell with holes, the conductive contact members with dome-shaped contact portions, and the interaction between these elements. The dome-shaped contact portions act as separate shielding elements that engage with the receptacle connector's metallic shell to block EMI leakage paths through the holes in the plug connector's metallic shell.
Solution Approach 2:
The shielding approach transitions from a two-dimensional flat spring finger structure to a three-dimensional dome-shaped contact portion structure. The dome shape provides radial extension and multi-directional contact capability, creating shielding in additional spatial dimensions that effectively block EMI leakage paths.
2Speed
If signal transmission speed is increased, then data transmission efficiency is improved, but EMI and RFI interference increases
Solution Approach 1:
The conductive contact members with dome-shaped contact portions are pre-configured in the plug connector before mating occurs. These dome-shaped structures are positioned to proactively engage with the receptacle connector's metallic shell, establishing EMI shielding in advance before high-speed signal transmission begins, thereby preventing EMI and RFI interference rather than addressing it after the fact.
3Volume of moving object
If conductive contacts are brought closer together to reduce connector size, then device portability is improved, but electromagnetic coupling increases generating noise and crosstalk
Solution Approach 1:
The dome-shaped contact portions of the conductive contact members act as intermediary shielding elements between the closely spaced conductive contacts. These dome structures engage with the receptacle connector's metallic shell to create an intermediate shielding barrier that reduces electromagnetic coupling and blocks noise and crosstalk between adjacent contacts that are forced closer together due to miniaturization.
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 EMI and RFI, improving signal transmission quality and compliance with regulatory standards by establishing a robust shielding effect through the conductive contact members.
Implementation Method 1
The resilient portion is cantilevered and suspended above the corresponding recessed portion and configured to provide flexing of the corresponding conductive contact member up or down to an angle from a natural state
Implementation Method 2
a low-impedance grounding path to be established between a metallic shell of the electrical plug connector and a metallic shell of the mating electrical receptacle connector through the conductive contact member
Data Source
AI summary
An electrical plug connector includes a metallic shell, and two conductive contact members. The two conductive contact members are respectively received in a top concave region and a bottom concave region of the insulated housing. When the electrical plug connector is inserted into a metallic shell of the electrical receptacle connector, each conductive contact members of the electrical plug connector comes in contact with the inner surface of the metallic shell of the electrical receptacle connector and a low-impedance grounding path is established between the metallic shell of the electrical plug connector and the metallic shell of the mating electrical receptacle connector through each conductive contact member.