Multipolar Connector Layout for EMI Shielding and Low Coupling
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Solution Overview
Problem
Existing multipolar connectors suffer from unwanted coupling and emission of electromagnetic noise due to their structure, which can lead to interference with electronic components on a circuit board, especially when viewed in the insertion-removal direction.
Innovation Solution
The multipolar connector design includes a first signal terminal, a first ground terminal, and an insulating member with an external terminal, where the signal terminal is entirely on the inner side of the external terminal, and the ground terminal's mount portion is located outward from the signal terminal's mount portion, reducing electromagnetic noise scattering and enhancing shielding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the signal terminal's mount portion extends beyond the external terminal, then the connector is easier to mount on the circuit board, but it causes unwanted coupling with electronic components and electromagnetic noise emission
Solution Approach 1:
The signal terminal is nested within the external terminal's layout area, with the signal terminal's mount portion positioned inside the external terminal's periphery when viewed in the third direction. This nesting arrangement ensures the signal terminal is shielded by the external terminal while maintaining proper mounting capability on the circuit board.
2Object-affected harmful factors
If the signal terminal is entirely enclosed by the external terminal, then electromagnetic noise shielding is enhanced, but the mounting structure becomes more complex
Solution Approach 1:
The ground terminal's mount portion is positioned outward from the signal terminal's mount portion, creating a localized structural differentiation. This local quality change allows the signal terminal to be fully enclosed for shielding while the ground terminal provides external mounting support, avoiding overall structural complexity.
3Object-affected harmful factors
If the ground terminal's mount portion is positioned outward from the signal terminal, then shielding performance is improved, but the connector occupies more space on the circuit board
Solution Approach 1:
The terminals extend in the second direction (orthogonal to the first direction), utilizing the vertical dimension rather than only horizontal expansion. This dimensional change allows the ground terminal's mount portion to extend outward for shielding without significantly increasing the footprint area on the circuit board.
Data Source
AI summary
A multipolar connector includes a first signal terminal, a first ground terminal, an insulating member that holds the first signal and ground terminals, and an external terminal along a periphery of the insulating member. The first signal and ground terminals are arranged side by side in a direction parallel to an X-axis, extend in a direction parallel to a Y-axis orthogonal to the X-axis, and each have a first end serving as a mount portion that connects to and mounts on a mount electrode on a circuit board. When viewed in a direction parallel to a Z-axis orthogonal to the directions parallel to the X and Y axes, a mount portion of the first signal terminal is within a layout area of the external terminal. When viewed in the direction parallel to the Z-axis, a mount portion of the first ground terminal is outward from the mount portion.