Transmission Unit With Dielectric Sheaths Reducing Crosstalk
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Solution Overview
Problem
Current high-speed signal transmission cables, such as those using HDMI, DVI, and DisplayPort, suffer from crosstalk due to metal shields that make the cables stiff and inconvenient, and existing solutions do not effectively reduce crosstalk without compromising flexibility or generating waste during assembly.
Innovation Solution
The transmission unit employs conductors with sheaths of different dielectric coefficients, where a high-dielectric material surrounds one conductor and a low-dielectric material surrounds another, allowing for reduced electric field concentration and crosstalk interference between signal pairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If metal shields are used to surround conductors to prevent crosstalk, then crosstalk protection is improved, but cable flexibility deteriorates and weight increases
Solution Approach 1:
The patent extracts the shielding function from metal shields and transfers it to dielectric sheaths with different dielectric coefficients. Each conductor is surrounded by a dielectric sheath instead of metal shield, eliminating the need for heavy metal shielding while maintaining crosstalk protection through dielectric properties
Solution Approach 2:
The patent changes the material parameter from conductive metal shields to dielectric sheaths with specific dielectric coefficients. By selecting dielectric materials with appropriate coefficients (first sheath: 2.5-4.0, second sheath: 1.5-2.5), the patent achieves crosstalk reduction without the mechanical drawbacks of metal shields
2Object-affected harmful factors
If metal shields are used to surround conductors, then crosstalk protection is improved, but cable weight increases
Solution Approach 1:
The patent removes the heavy metal shielding component and replaces it with lightweight dielectric sheaths that provide equivalent or superior crosstalk protection through their dielectric properties rather than conductive shielding
Solution Approach 2:
The patent uses composite dielectric sheath structures with different materials having different dielectric coefficients. The first sheath uses a dielectric material with coefficient 2.5-4.0 while the second sheath uses material with coefficient 1.5-2.5, creating a composite structure that optimizes both protection and weight
3Object-affected harmful factors
If metal shields are used to surround conductors, then crosstalk protection is improved, but manufacturing complexity increases due to stripping requirements
Solution Approach 1:
The patent eliminates the complex metal shield stripping process by using dielectric sheaths that can be directly connected to piercing terminals. The sheaths are designed to be compatible with automated assembly processes, removing the manual intervention required for metal shield preparation
Solution Approach 2:
The dielectric sheaths are designed to work directly with piercing terminals without requiring pre-stripping or special preparation. The terminals can pierce through the sheaths to access conductors, allowing the sheaths to serve both as insulation and as compatible interfaces for automated connection
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
This configuration effectively reduces crosstalk noise interference, as demonstrated by electromagnetic tests, while maintaining cable flexibility and avoiding the need for stripping metal shields, thus enhancing signal transmission quality and ease of assembly.
Implementation Method 1
The first sheath has a dielectric coefficient higher than that of the second sheath... Since the high-dielectric coefficient material has good ability of concentrating electric field to enable easy storage of electric field energy
Data Source
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AI summary
A transmission unit with reduced crosstalk signal includes a first conductor group (11) having at least one first conductor (111) surrounded by a first sheath (1111) and at least one second conductor (112) surrounded by a second sheath (1121). The first and the second conductor are axially arranged corresponding to one another. The first sheath has a dielectric coefficient higher than that of the second sheath, so that a difference in dielectric property exists between the first and the second conductor to enable reduction of crosstalk occurred during high-speed signal transmission over the transmission unit.