Laminated Multi-Conductor Cable Crosstalk Isolation
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Solution Overview
Problem
Conventional laminated multi-conductor cables face challenges in ensuring isolation between signal lines, leading to difficulties in high-frequency signal transmission due to close proximity of conductors, which results in noise propagation and crosstalk.
Innovation Solution
The proposed laminated multi-conductor cable design includes signal lines on different layers with strategically placed ground conductors and openings, ensuring greater distance between signal lines and reducing capacitance, thereby enhancing isolation and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If flat conductors are arranged close to each other on the same layer, then the cable structure is compact, but isolation among conductors deteriorates leading to noise propagation and crosstalk
Solution Approach 1:
The patent transitions from planar arrangement of conductors on the same layer to three-dimensional arrangement across multiple layers. Signal lines are positioned on different layers with ground conductors interspersed between them, utilizing the vertical dimension to achieve both compactness and improved isolation through increased spatial separation.
Solution Approach 2:
Ground conductors are introduced as intermediary elements positioned between signal lines on different layers. These ground conductors act as shields that electrically isolate adjacent signal lines, reducing capacitive coupling and preventing crosstalk while maintaining the compact multi-layer structure.
2Reliability
If ground conductors with openings are positioned over signal lines, then isolation between signal lines is improved, but manufacturing complexity increases
Solution Approach 1:
The ground conductors are segmented into multiple sections along the signal line, with openings positioned at specific intervals. This segmentation allows the ground conductor to provide shielding where needed while maintaining manufacturability through standardized patterns that can be efficiently produced using conventional PCB fabrication techniques.
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 design effectively minimizes noise propagation and crosstalk, ensuring reliable high-frequency signal transmission by maintaining isolation between signal lines while allowing for a thinner, more flexible cable structure.
Implementation Method 1
ensuring greater distance between signal lines and reducing capacitance, thereby enhancing isolation
Data Source
AI summary
A laminate body includes a plurality of dielectric sheets laminated together. A first ground conductor is provided in or on the laminate body. A second ground conductor is provided in or on the laminate body and located on a different layer from the first ground conductor. A signal line is provided between the ground conductors and with respect to a direction of lamination. A signal line is provided between the ground conductors and with respect to the direction of lamination and located closer to the second ground conductor than the signal line is, and the signal line has a portion extending along the signal line in a parallel-lines area when viewed from the direction of lamination. The first ground conductor has openings in the parallel-lines area, and the openings are arranged over the signal line when viewed from the direction of lamination.