Cable Connector Metal Shielding for Crosstalk Reduction
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Solution Overview
Problem
In differential high speed transmission, crosstalk occurs between proximate differential pairs due to the absence of a shield layer at the connection points between the cable and the connector, which is not addressed by existing connectors.
Innovation Solution
A cable connector with a metal shield member that covers the circumference of the differential pair on the electronic device side, including a first shield member for one side and a second shield member for the remaining sides, or a shell cover and shield terminals to cover the differential pairs, reducing crosstalk by physically separating adjacent pairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If no shield layer is provided at the cable end connection portion, then the cable connector structure is simpler and easier to manufacture, but crosstalk occurs between proximate differential pairs
Solution Approach 1:
The shield member is divided into a first shield member and a second shield member that can be assembled separately. The first shield member covers one side of the differential pair while the second shield member covers the other sides, allowing for easier manufacturing and assembly while providing complete circumferential shielding to reduce crosstalk between differential pairs
Solution Approach 2:
The shield member is specifically positioned to cover the circumferential region of the differential pair at the cable end connection portion where crosstalk is most likely to occur. This localized shielding approach addresses the crosstalk problem at the critical interface without requiring shielding along the entire cable length, balancing manufacturing simplicity with effective crosstalk reduction
2Object-affected harmful factors
If a metal shield member is added to cover the differential pair, then crosstalk is reduced, but the device complexity increases
Solution Approach 1:
The first shield member and second shield member are designed to be assembled together to form a complete circumferential shield around the differential pair. This merging of multiple shield components creates an integrated shielding structure that effectively reduces crosstalk while maintaining manageable complexity through modular assembly
Solution Approach 2:
The shield member acts as an intermediary structure between adjacent differential pairs, providing electromagnetic isolation. By introducing this intermediate shielding element at the critical cable-end interface, crosstalk is reduced without requiring complex redesign of the entire connector or cable assembly
3Object-affected harmful factors
If the shield member covers all sides of the differential pair, then crosstalk reduction is maximized, but the assembly process becomes more difficult
Solution Approach 1:
The shield member is segmented into a first shield member for one side and a second shield member for the remaining sides. This segmentation allows each shield component to be simpler in structure and easier to position, while together they provide complete circumferential coverage to maximize crosstalk reduction
Solution Approach 2:
The first shield member and second shield member are designed to be pre-positioned or pre-assembled in a manner that facilitates subsequent assembly steps. The modular design allows for preliminary placement of shield components before final assembly, making the overall assembly process easier while achieving complete shielding coverage
Data Source
AI summary
Provided are a cable connector and a cable connector assembly that can reduce crosstalk that may occur between proximate differential pairs at an end of a cable on an electronic device side. The cable connector for electrically connecting a cable (31a) to an electronic device (for example, an optical transceiver or an integrated circuit) includes a metal shield member (20) configured to cover a circumference of a part near an end of a differential pair (30a) on the electronic device side, and the differential pair is formed of the cable (31a).