Connector Grounding Layout for High-Frequency Noise Suppression
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Solution Overview
Problem
High-frequency signals transmitted through connector terminals can radiate and propagate to other terminals, causing radiation noise that deteriorates transmission characteristics.
Innovation Solution
A connector member configuration where substrate-side terminal conductors not used for high-frequency signals are connected to a ground conductor at multiple locations, reducing radiation noise by providing additional propagation paths to ground potential.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection terminals are arranged to transmit high-frequency signals, then signal transmission capability is improved, but radiation noise increases and transmission characteristics deteriorate
Solution Approach 1:
A ground conductor is introduced as an intermediary element between the connection terminals and the reference potential. This ground conductor provides a controlled path for high-frequency signals to return to ground, preventing unwanted radiation. The ground conductor acts as a mediator that manages the electromagnetic field distribution and reduces noise coupling between adjacent terminals.
Solution Approach 2:
The ground conductor is designed to maintain equipotential conditions across the connector structure. By providing a low-impedance path to ground potential, the ground conductor equalizes the potential distribution, reducing voltage differences that would otherwise cause radiation. This equipotential approach minimizes the antenna effect of terminal structures.
2Device complexity
If substrate-side terminal conductors are connected to ground at single location, then structure is simple, but radiation noise suppression is insufficient
Solution Approach 1:
The ground connection is segmented into multiple connection points along the substrate-side terminal conductor. Instead of a single ground connection, the terminal conductor is connected to the ground conductor at multiple locations, creating multiple parallel paths for noise current. This segmentation reduces the impedance of the ground path and improves noise suppression effectiveness.
Solution Approach 2:
The ground connection transitions from a single-point (0D) or single-line (1D) connection to a multi-point distributed connection along the terminal conductor. By extending the ground connection in the longitudinal dimension, the patent creates multiple grounding paths that effectively suppress radiation noise without significantly increasing structural complexity.
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 suppresses the deterioration of transmission characteristics by minimizing radiation noise, as demonstrated by improved insertion loss characteristics from 30 GHz to 35 GHz.
Implementation Method 1
a first ground conductor connected to ground potential... reducing a radiation noise due to the high-frequency signal
Data Source
AI summary
A connector member includes a connector and a substrate. The connector includes an insulating member, and internal terminals held by the insulating member. The substrate includes an insulating base material, substrate-side terminal conductors formed on a main surface of the base material, and a ground conductor connected to ground potential. The internal terminals are mounted on the substrate-side terminal conductors, respectively. At least two of the substrate-side terminal conductors on which the internal terminals not used for transmitting signals including a high-frequency signal are mounted are connected to the ground conductor at multiple locations.