Non-Round Stranded Conductor Signal Damping Reduction
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Solution Overview
Problem
Conventional stranded conductors experience signal damping and interference due to variances in the external circumference, leading to poor transmission properties, especially at high frequencies, due to the combination of individual wires with a circular cross-section.
Innovation Solution
A data cable with a stranded conductor composed of individual wires with a non-round cross-section, arranged to approximate a circular shape, reducing interstice variance and enhancing current and voltage distribution homogeneity, thereby minimizing signal damping and improving transmission properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional round individual wires are used in a stranded conductor, then the conductor can be manufactured with standard round wires, but the external circumference exhibits variances and interference points that cause high signal damping
Solution Approach 1:
The patent applies asymmetry by changing the wire cross-section from round to non-round shapes (such as triangular, rectangular, or oval). This asymmetric cross-sectional shape allows the wires to pack more efficiently in the stranded conductor, creating a more uniform external circumference that reduces interference points and signal damping while maintaining manufacturability through standard drawing processes.
Solution Approach 2:
The patent changes the geometric parameter of the wire cross-section from circular to non-circular shapes. This parameter change fundamentally alters how the wires arrange themselves in the stranded conductor, eliminating the variance in external circumference that causes signal interference, while the wires can still be manufactured using conventional metal drawing techniques.
2Ease of operation
If individual wires are combined in a stranded conductor, then flexibility is improved, but the external circumference becomes non-circular causing interference points and signal damping
Solution Approach 1:
By using non-round wire cross-sections (triangular, rectangular, or oval), the patent creates an asymmetric structure that packs more uniformly when strands are twisted together. This asymmetric design maintains the flexibility benefits of stranded conductors while eliminating the external circumference variances that cause signal interference, thus resolving the contradiction between flexibility and signal quality.
3Reliability
If round individual wires are used, then current density concentrates at outermost points causing signal damping, but changing to non-round cross-section requires specialized manufacturing
Solution Approach 1:
The patent changes the cross-sectional geometry parameter from circular to non-circular shapes. This parameter change redistributes the current density more uniformly across the wire surface by eliminating the concentration at outermost points, while the wires can still be manufactured using standard metal drawing processes, thus resolving the contradiction between current distribution homogeneity and manufacturing ease.
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 non-round cross-section of the external wires in the stranded conductor reduces signal damping, increases current density homogeneity, and lowers the risk of partial discharge, resulting in improved transmission efficiency and reduced material costs through the elimination of compacting processes.
Implementation Method 1
In the case of a conductor which is used for the data cable, the conduction of current then occurs mainly at the external circumference of the conductor owing to the skin effect
Data Source
AI summary
A data cable has a specially formed stranded conductor, as a result of which the transmission properties of the data cable are significantly improved. The stranded conductor is surrounded by insulation and has an unpressed assembly composed of a plurality of individual wires which are of a same type and being embodied as external wires and being disposed around a center. The external wires are embodied with a non-round cross section, with a result that when viewed in cross section an extent of the external wires increases radially outward from the center.