High-Speed Connector Shield Assembly for Field-Termination Crosstalk
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Solution Overview
Problem
High speed electrical connectors face challenges in assembling crosstalk shields due to the delicate nature of differential pairs of conductors, leading to difficulties in isolating crosstalk between closely spaced parallel conductors, especially during field termination.
Innovation Solution
A preassembled crosstalk shield with mounting projections and recesses provides a secure mechanical and electrical connection to the shell housing, ensuring effective isolation of crosstalk between high speed differential pairs through an interference engagement mechanism, which includes embossments and recesses for a stable interference fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If crosstalk shields are assembled in the field during connector termination, then the connector can be terminated on-site, but the assembly becomes difficult and problematic due to the delicate nature of the shields and small size of differential pairs
Solution Approach 1:
The crosstalk shields are preassembled to the connector shell in the factory before the connector is shipped to the field. This preliminary assembly eliminates the difficulty of field assembly while maintaining the capability for field termination, as the shields are already in place and properly positioned when the connector housing is opened at the termination site.
Solution Approach 2:
The crosstalk shields are integrated with the connector shell as a single preassembled unit, combining the shell and shields into one component assembly. This merging eliminates the separate assembly step in the field and simplifies the field termination process to only requiring the opening of the connector housing and termination of conductors.
2Adaptability or versatility
If the connector shell and crosstalk shields are assembled in the field, then field termination is possible, but the delicate shields and small differential pairs make assembly problematic
Solution Approach 1:
The crosstalk shields are preassembled to the connector shell in the factory with high precision equipment and controlled conditions, ensuring accurate positioning and proper engagement. This preliminary precision assembly maintains the adaptability for field termination while eliminating the precision problems that would occur if assembly were attempted in the field.
3Ease of manufacture
If conventional assembly methods are used for crosstalk shields, then the connector can be manufactured, but the delicate shields require difficult assembly processes
Solution Approach 1:
The connector shell and crosstalk shields are manufactured and assembled together as an integrated unit in the factory, combining multiple manufacturing steps into a single process. This merging reduces the overall assembly process complexity while maintaining manufacturability, as the shields are attached to the shell before final connector assembly and shipping.
Data Source
Figure 1
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Figure 3~5
AI summary
An assembly (10) for terminating a high speed cable. The assembly (10) includes a shell housing (12) and preassembled crosstalk shield (14). The shell housing (12) has a mating end (20) and a conductor receiving end (22). One or more shield receiving recesses (32) extend from the conductor receiving end (22) toward the mating end (20). The preassembled crosstalk shield (14) has mounting projections (52, 54, 72, 74) which are positioned in the one or more shield receiving recesses (32). The mounting projections (52, 54, 72, 74) and the one or more shield receiving recesses (32) provide an interference engagement to provide a secure mechanical and electrical connection between the shell housing (12) and the preassembled crosstalk shield (14).