Shielded Electrical Connector Layout for High-Frequency Noise Suppression
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Solution Overview
Problem
Existing electrical connectors experience high-frequency radiation noise due to the alignment of electric potentials in the outer terminal, promoting the radiation of noise from the inner terminal.
Innovation Solution
The electrical connector design includes an outer terminal with specific potential gradients that counteract the direction of high-frequency radiation noise, using insulating holding members to align electric fields oppositely to the noise direction, and incorporating elastic deformable materials like phosphor bronze for electromagnetic shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the outer terminal is designed with multiple parts (first part, outer part, second part, inner part) to provide electromagnetic shielding, then the shielding coverage is improved, but the electric potential difference creates an electric field that promotes high-frequency radiation noise from the inner terminal
Solution Approach 1:
The outer terminal is divided into multiple parts (first part, outer part, second part, inner part) to provide comprehensive electromagnetic shielding coverage. Each part serves a specific function in blocking electromagnetic fields from different directions, ensuring complete shielding while managing electric potential distribution.
Solution Approach 2:
The outer terminal parts are designed to maintain equipotential conditions by providing continuous electrical connection between all parts. This ensures that the outer terminal surfaces facing the inner terminal are at the same electric potential, preventing electric field formation that would promote radiation noise.
2Volume of moving object
If the inner terminal is positioned closer to the outer terminal to reduce connector size, then the device compactness is improved, but the electric field interaction between terminals increases radiation noise
Solution Approach 1:
The inner terminal is nested within the outer terminal structure, with the outer terminal completely surrounding the inner terminal. This nested configuration maximizes shielding effectiveness while minimizing the overall connector volume, as the outer terminal serves both as shielding and as the outer boundary of the connector.
Solution Approach 2:
The outer terminal acts as an intermediary between the inner terminal and the external environment. By positioning the outer terminal between the inner terminal and surrounding space, it blocks and redirects electromagnetic fields, preventing direct interaction between the inner terminal and external fields while reducing radiation noise.
3Object-affected harmful factors
If the outer terminal parts are arranged to maximize shielding effectiveness, then the electromagnetic interference protection is improved, but the electric field direction aligns with radiation noise direction promoting noise emission
Solution Approach 1:
Different parts of the outer terminal have different local functions: the first part and outer part provide shielding from external fields, while the inner part specifically addresses the interface with the inner terminal. Each part is positioned and shaped to optimize its local shielding effectiveness while maintaining overall equipotential conditions.
Solution Approach 2:
Instead of allowing electric fields to form naturally between terminals of different potentials, the design inverts the approach by making the outer terminal surfaces facing the inner terminal equipotential. This reverses the conventional field distribution pattern, preventing the formation of fields that would promote radiation noise while maintaining shielding effectiveness.
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 design effectively suppresses high-frequency radiation noise by aligning electric fields oppositely to the noise direction, reducing electromagnetic interference and enhancing signal integrity.
Implementation Method 1
a holding member that has electrically insulating properties, extends in a long-side direction and a short-side direction, and is configured to hold the inner terminal and the outer terminal
Implementation Method 2
By such difference in the electric potential, an electric field from the inner part toward the outer part is caused in the outer terminal
Data Source
AI summary
An electrical connector which suppresses radiation noise at a high frequency from an inner terminal, and an electrical connector set provided with the electrical connector. An electrical connector includes an inner terminal; an outer terminal surrounding the inner terminal; and a holding member that has electrically insulating properties, extends in the long-side direction and the short-side direction, and is configured to hold the inner terminal and the outer terminal. The holding member has a first surface located on the first side that is the side facing a mounting circuit board, a second surface located on the second side opposite from the first side, and an inner side surface and an outer side surface connecting the first surface to the second surface. The outer terminal includes a first part extending along the first surface, and an inner part connected to the first part and extending along the inner side surface.