Connector Cable Crosstalk Reduction via Signal Line Segmentation
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Solution Overview
Problem
Conventional connector cables face challenges in increasing high-speed differential signal lines while minimizing crosstalk, as the number of high-speed differential signal lines increases.
Innovation Solution
The connector cable design limits the number of consecutive pairs of high-speed differential signal lines to two by allocating a non-high-speed differential signal line between them, with ground terminals on both ends, reducing crosstalk by isolating adjacent pairs with ground terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of high-speed differential signal lines is increased, then the signal transmission capacity is improved, but the crosstalk between signal lines increases
Solution Approach 1:
The connector cable is segmented into multiple groups, with each group containing a limited number of consecutive high-speed differential signal line pairs (maximum two pairs). Non-high-speed differential signal lines are used as separators between these groups. This segmentation prevents excessive crosstalk by ensuring that no more than two pairs of high-speed differential signal lines are adjacent to each other, while still allowing the overall cable to support a large number of high-speed signal lines through the distributed group structure.
2Ease of manufacture
If signal lines are grouped by type with lines of the same type adjacent to each other, then manufacturing is facilitated, but crosstalk increases when the number of high-speed differential signal lines increases
Solution Approach 1:
The patent applies local quality by differentiating the arrangement strategy for different types of signal lines. High-speed differential signal lines are arranged in small groups (maximum two consecutive pairs) separated by non-high-speed differential signal lines, while non-high-speed differential signal lines can be grouped together without the same crosstalk constraints. This localized differentiation allows manufacturing simplicity where applicable while preventing crosstalk in critical high-speed signal regions.
Data Source
AI summary
A connector cable includes a plurality of contacts placed in a row and a plurality of cables connected to the plurality of contacts. The plurality of cables includes at least three pairs of high-speed differential signal lines for transmitting high-speed differential signals, at least one non-high-speed differential signal line for transmitting a non-high-speed differential signal, and a plurality of ground terminals. The plurality of ground terminals is allocated to contacts on both ends among the plurality of contacts and a contact between two pairs of high-speed differential signal lines or between one pair of high-speed differential signal lines and one non-high-speed differential signal line to limit the number of consecutive pairs of high-speed differential signal lines to two.