Shielded Connector Layout for Resonance and Noise Reduction
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Solution Overview
Problem
Existing connectors experience resonance and noise propagation issues due to the design of their shields and terminal arrangements, leading to inefficiencies in signal transmission and increased noise levels.
Innovation Solution
The connector design incorporates an outer shield, an inner shield, and virtual paths connecting the shields' tip regions to form electrically-closed loops that are shorter than the wavelength of the maximum signal frequency, reducing resonance and noise propagation by ensuring seamless surfaces and strategic terminal arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional shield designs are used in connectors, then shielding coverage is provided, but resonance and noise propagation occur due to large electrically-closed loop areas
Solution Approach 1:
The shield is divided into multiple segments with individual shields for different signal groups. Each shield forms separate electrically-closed loops, reducing the area of each loop and thereby minimizing resonance and noise propagation while maintaining shielding effectiveness.
Solution Approach 2:
Inner shields are nested within outer shields, creating concentric electrically-closed loops. This nested configuration reduces the effective loop area for each shielding layer and provides multiple levels of noise isolation without significantly increasing overall structural complexity.
2Reliability
If shields with large loop areas are used, then comprehensive shielding is achieved, but resonance occurs at signal frequencies
Solution Approach 1:
The continuous shield is segmented into multiple smaller shields, each forming a separate electrically-closed loop. This segmentation reduces the loop area below the resonance threshold for signal frequencies, eliminating resonance while maintaining comprehensive shielding coverage through the arrangement of multiple segments.
Solution Approach 2:
Different shield segments are optimized for specific signal groups or frequency ranges. Each segment's loop area and configuration are tailored to address local shielding requirements, preventing resonance in specific frequency bands while maintaining overall signal transmission quality.
3Object-affected harmful factors
If multiple shields are added to reduce loop area, then noise propagation is reduced, but device complexity increases
Solution Approach 1:
Multiple shields are nested concentrically, with inner shields placed within outer shields. This nesting approach reduces the number of discrete components compared to side-by-side arrangements, as inner shields utilize the space within outer shields, thereby reducing noise propagation without proportionally increasing device complexity.
Solution Approach 2:
The shield structure is designed to serve multiple functions: electromagnetic shielding, mechanical support, and thermal management. By integrating these functions into the shield components themselves, the number of additional parts is reduced, and the complexity increase from adding shields is mitigated.
Data Source
AI summary
A connector includes an outer shield, a terminal surrounded by the outer shield, a housing fixed to the outer shield and holding the terminal; and an inner shield surrounded by the outer shield. The outer shield, the inner shield, and two virtual paths that connect the two tip regions of the inner shield to the outer shield by shortest distances, respectively, constitute plural electrically-closed loops surrounding the terminal. The electrically-closed loops include one or more particular electrically-closed loops. Each of the one or more particular electrically-closed loops does not surround any electrically-closed loop among the plurality of electrically-closed loops other than the each of the one or more particular electrically-closed loops. A longest loop length of the one or more loop lengths of the one or more particular electrically-closed loops is shorter than a wavelength of a maximum frequency of a transmission signal flowing through the terminal. This connector reduces resonance of a transmission signal.