High-Speed Connector Terminal Module Shielding for Low Crosstalk
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Solution Overview
Problem
Conventional backplane connectors suffer from inadequate crosstalk resistance and insertion loss reduction, necessitating an improved shielding mechanism for high-speed electrical connectors.
Innovation Solution
A high-speed electrical connector design featuring a terminal module with grounding terminals and differential signal pairs embedded in an insulating body, accompanied by shielding plates and a rear stiffener, which enhances electromagnetic isolation and reduces signal interference by establishing a grounding path between shielding elements and grounding terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional backplane connectors use two shields assembled on opposite sides of the insulator, then the connector structure is simple, but the crosstalk resistance and insertion loss reduction are insufficient
Solution Approach 1:
The connector is divided into multiple terminal modules, each with its own shielding plate. This segmentation allows each module to be independently shielded, improving crosstalk resistance between adjacent signal pairs while maintaining overall structural organization through modular design.
Solution Approach 2:
Each terminal module is equipped with a dedicated shielding plate that provides localized electromagnetic shielding exactly where signal pairs are positioned. This local shielding approach targets specific areas needing protection against crosstalk, rather than applying uniform shielding throughout the entire connector structure.
2Reliability
If conventional backplane connectors use two shields on opposite sides, then manufacturing is straightforward, but insertion loss reduction is inadequate
Solution Approach 1:
The shielding structure is segmented into individual plates for each terminal module, which can be separately manufactured and then assembled. This segmentation enables specialized optimization of each shielding plate for insertion loss reduction while maintaining ease of manufacturing through standardized modular components.
Solution Approach 2:
The shielding plate acts as an intermediary element between adjacent terminal modules, providing electromagnetic isolation that reduces signal interference and insertion loss. The plate's positioning and grounding configuration create an effective barrier without requiring complex integrated shielding structures.
3Reliability
If shielding plates are stacked between every two adjacent terminal modules, then electromagnetic isolation is enhanced, but the number of components increases
Solution Approach 1:
The connector is segmented into discrete terminal modules with shielding plates positioned between them. This segmentation creates natural electromagnetic isolation zones while maintaining a manageable number of components through the modular architecture, where each module-shielding plate combination functions as an integrated unit.
Solution Approach 2:
The shielding plate is designed to serve multiple functions simultaneously: it provides electromagnetic isolation between terminal modules, acts as a grounding element, and structurally organizes adjacent signal pairs. By merging these functions into a single component, the number of separate parts is reduced while maintaining effective electromagnetic isolation.
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
The design effectively increases electromagnetic isolation, decreases insertion loss, and reduces crosstalk between signal pairs, thereby improving the performance of high-speed electrical connectors.
Implementation Method 1
An exposed surface of the connecting portion is coated with an insulating thin film
Implementation Method 2
establishing a grounding path between shielding elements and grounding terminals
Data Source
AI summary
The present invention discloses a terminal module and a high-speed electrical connector using the same. The connector includes a number of terminal modules, a number of shielding plates, a front cover and a rear stiffener. The terminal module has grounding terminals and differential signal pairs embedded within an insulating body. Each differential signal pair have contacting portions, mounting portions and connecting portions. The insulating body defines a number of cutouts thereon with the connecting portions of the differential signal pairs partially exposed therefrom. The front cover has a U-shaped cross-section. An exposed surface of the connecting portion of the differential signal pairs is coated with an insulating thin film.