Ethernet Connector Shielding Layout for Vehicle EMI Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ethernet connections in vehicles are susceptible to electromagnetic interference, leading to deterioration of data transfer functionality, and are also prone to physical strain from driving movements and extreme weather.
Innovation Solution
A connector design for establishing an ethernet connection that includes a housing with separate and non-contacting connector shieldings for each twisted pair, ensuring individual shielding of ending contacts and sharing a common electrical potential with the pair shieldings, while maintaining physical separation to prevent electrical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional ethernet connectors with shared shielding are used, then the structure is simple, but electromagnetic interference deteriorates data transfer functionality in vehicle environments
Solution Approach 1:
The connector divides the common shielding into separate shieldings for each twisted pair. Each connector shielding is assigned to a specific twisted pair and contacts only the corresponding pair shielding, creating electrically isolated shielding segments that prevent interference between pairs while maintaining individual protection against electromagnetic interference.
Solution Approach 2:
Non-conductive separators are introduced as intermediary elements between adjacent connector shieldings. These separators physically and electrically isolate the shieldings from each other, preventing harmful electromagnetic coupling while allowing each shielding to independently protect its assigned twisted pair.
2Volume of stationary object
If connector shieldings are arranged close together, then the connector housing space is utilized efficiently, but physical strain causes electrical contact between shieldings leading to interference
Solution Approach 1:
Non-conductive separators act as intermediary elements positioned between adjacent connector shieldings. These separators maintain the compact arrangement of shieldings within the connector housing while simultaneously preventing electrical contact between them, ensuring reliable electrical isolation even under physical strain during vehicle operation.
3Stability of the object's composition
If individual pair shieldings contact the outer shielding, then a common electrical potential is established, but this creates a large conductive area susceptible to electromagnetic interference
Solution Approach 1:
The shielding system is segmented so that each pair shielding contacts only its dedicated connector shielding, not a common outer shielding. This segmentation breaks the large continuous conductive area into smaller isolated segments, reducing the antenna effect and susceptibility to electromagnetic interference while maintaining stable electrical potential references for each twisted pair.
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 connector effectively shields the ethernet connection from electromagnetic interference, enhances data throughput by reducing noise, and maintains reliable electrical contact despite physical strain, thereby ensuring stable data transfer in vehicle environments.
Implementation Method 1
In each connector shielding, the ending contacts of at least one of the twisted pairs are arranged so that the connector shielding at least partially encloses the ending contacts arranged therein
Implementation Method 2
The connector further comprises a connector housing in which the ending contacts are arranged and at least two connector shieldings arranged in the connector housing and comprising conductive and/or magnetic material
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Connector (10; 10a; 10b) for establishing an ethernet connection comprising an ethernet cable end portion (20) comprising at least two twisted pairs (22a, 22b). Each twisted pair (22a, 22b) comprises two ending contacts (24a, 24b). The ethernet cable end portion (20) further comprises a pair shielding (26a, 26b) for each twisted pair (22a, 22b) comprising conductive and/or magnetic material. The connector (10) further comprises a connector housing (40) in which the ending contacts (24a, 24b) are arranged and at least two connector shieldings (30a, 30b) arranged in the connector housing (40) and comprising conductive and/or magnetic material. In each connector shielding (30a, 30b), the ending contacts (24a, 24b) of at least one of the twisted pairs (22a, 22b) are arranged so that the connector shielding (30a, 30b) at least partially encloses the ending contacts (24a, 24b) arranged therein. Each connector shielding (30a, 30b) contacts the pair shielding (26a, 26b) of the at least one twisted pair (22a, 22b) comprising the ending contacts (24a, 24b) enclosed by the respective connector shielding (30a, 30b). Further, the connector shieldings (30a, 30b) are arranged separately and out of contact from each other within the connector housing (40).