Signal Transmission Cable Crosstalk Reduction
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Solution Overview
Problem
Existing signal transmission cables suffer from significant Near End Crosstalk (NEXT) and Far End Crosstalk (FEXT) due to adjacent metal wires configuring different signal transmission lines, which are often arranged based on mountability considerations, leading to increased crosstalk influence.
Innovation Solution
The signal transmission cable design includes a terminal part with a substrate and connection parts that ensure metal wires configuring different signal transmission lines are not adjacent both on the substrate and inside the cable, with outer and inner metal wires arranged to minimize adjacency, and the use of a signal processing circuit to further reduce crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If metal wires are arranged adjacently on the substrate for mountability, then ease of manufacture is improved, but crosstalk between different channels increases
Solution Approach 1:
The patent applies dimensionality change by rearranging metal wires from an adjacent planar configuration on the substrate to a non-adjacent three-dimensional configuration inside the cable. Specifically, wires that are adjacent at the terminal part are positioned at different radial positions or angles within the cable cross-section, effectively using spatial dimensionality to separate interfering signals while maintaining connection simplicity.
2Device complexity
If metal wires configuring different signal transmission lines are arranged adjacently inside the cable, then cable structure simplicity is improved, but signal integrity deteriorates due to increased crosstalk
Solution Approach 1:
The patent uses spatial rearrangement in the cable cross-section to separate adjacent wires that carry different signal transmission lines. By positioning these wires at different angular positions or radial distances from the cable center, the invention reduces electromagnetic coupling between channels while maintaining a relatively simple overall cable structure without requiring complex shielding or routing.
3Ease of manufacture
If outer metal wires transmitting signals in the same direction are arranged adjacently, then ease of manufacture is improved, but Far End Crosstalk increases
Solution Approach 1:
The patent addresses FEXT by arranging outer metal wires that transmit signals in the same direction at non-adjacent positions within the cable cross-section. Specifically, these wires are positioned at different angular positions around the cable perimeter, utilizing the circular geometry to maximize separation distance and reduce electromagnetic interference between co-directional signals.
Data Source
AI summary
A signal transmission cable of the present invention comprises a terminal part electrically connectable to an external device, and a cable including metal wires of eight or more channels that are electrically connectable to the terminal part, the terminal part has a substrate including a plurality of connection parts that are electrically connectable to the external device and connected respectively to the metal wires of the individual channels included in the cable, and the metal wires of the mutually different channels that are adjacently connected at the plurality of connection parts are arranged so as not to be adjacent to each other inside the cable.