Foamed Insulation Cable Structure for Stable High-Speed Signals
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Solution Overview
Problem
Conventional data transmission cables suffer from unstable electrical performance due to mismatched capacitance and impedance between wire cores, leading to poor signal integrity, especially during high-speed data transmission.
Innovation Solution
A cable design featuring spaced conductive wire cores wrapped in a foamed insulation structure, with additional insulation and shielding layers, ensuring fixed positioning and reduced dielectric constant for improved stability and signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional cable structure with insulated wire cores and shielding layer is used, then the cable can transmit data, but the electrical performance is unstable and signal integrity is poor due to mismatched capacitance and impedance
Solution Approach 1:
The patent combines multiple insulation functions into a single integrated interior insulation structure that simultaneously provides electrical insulation between wire cores, mechanical positioning, and capacitance balancing. This merging of functions reduces structural complexity while improving electrical performance stability, directly resolving the technical contradiction.
Solution Approach 2:
The patent modifies the dielectric constant of the interior insulation structure by using foamed insulation material with optimized foam density and composition. This parameter change enables capacitance matching between different wire cores, improving impedance consistency and signal integrity without adding structural complexity.
2Reliability
If wire cores are spaced apart in conventional cable structure, then insulation is provided, but capacitance and impedance mismatch occurs leading to poor signal integrity
Solution Approach 1:
The patent applies different foam densities and dielectric properties at different locations within the interior insulation structure. By locally adjusting the insulation characteristics around each wire core, the patent achieves capacitance matching and impedance consistency across all pairs, improving signal integrity while maintaining manufacturability.
Solution Approach 2:
The patent changes the dielectric parameters of the insulation material by using foamed structures with controlled cell density and material composition. This enables precise adjustment of capacitance values to achieve matching between different wire core pairs, resolving the manufacturing precision challenge.
3Reliability
If conventional insulation structure is used, then wire cores are insulated, but the cable structure is unstable and electrical performance varies during high-speed data transmission
Solution Approach 1:
The patent uses composite foamed insulation material combining different polymers and foam agents to achieve optimal mechanical strength and electrical properties simultaneously. This composite structure provides both structural stability and consistent electrical performance during high-speed data transmission, resolving the contradiction between strength and reliability.
Solution Approach 2:
The patent optimizes the foam density, cell size, and material composition parameters to achieve the right balance between mechanical strength and electrical performance stability. By carefully controlling these parameters, the patent ensures both structural integrity and consistent electrical characteristics under high-speed transmission conditions.
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 design enhances electrical performance stability, reduces echo loss, and improves frequency bandwidth, enabling high-speed and high-frequency signal transmission with a stable cable structure.
Implementation Method 1
an interior insulation structure circumferentially wrapped around and contacting each of the at least two conductive wire cores to fix the at least two conductive wire cores. The interior insulation structure is a foamed insulation structure in which the at least two conductive wire cores are fixedly maintained
Data Source
AI summary
A cable includes at least two conductive wire cores spaced apart from each other and extending in a longitudinal direction of the cable, and an interior insulation structure circumferentially wrapped around and contacting each of the at least two conductive wire cores to fix the at least two conductive wire cores. The interior insulation structure is a foamed insulation structure in which the at least two conductive wire cores are fixedly maintained. The cable further includes an internal insulation layer wrapped over and contacting the interior insulation structure on an outer side of the interior insulation structure, a first conductive shielding layer wrapped over the internal insulation layer on an outer side of the internal insulation layer, and an external insulation layer wrapped over an outside of the first conductive shielding layer.