Flexible Cable Shield Compression to Prevent Bending Discontinuities
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Solution Overview
Problem
The unintentional unwrapping, kinking, or loosening of the electrical shield surrounding the dielectric material in signal transmission lines, particularly during bending or twisting, leads to unwanted electrical discontinuities, degrading signal performance.
Innovation Solution
Incorporating spacers between the electrical shields and the dielectric core to apply a compressive force, maintaining constant contact and preventing unwanted deformation of the electrical shield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrical shield is wrapped helically about the dielectric to improve signal performance, then the cross-sectional shape can approach a rectangle, but the electrical shield can inadvertently deform (unwrap, kink, loosen) during bending or twisting
Solution Approach 1:
The patent applies preliminary action by pre-compressing the electrical shield against the dielectric core using compression elements (such as foam layers or mechanical compressors) during manufacturing. This pre-compression ensures that the shield maintains constant contact with the core before the cable is even installed, preventing unwrap, kink, or loosen deformation during subsequent bending or twisting operations. The compression force is built into the cable structure in advance, addressing the stability issue before it arises during use.
2Reliability
If the dielectric is made racetrack-shaped with flat surfaces to improve rectangular approximation, then signal performance improves, but the electrical shield experiences discontinuities during manipulation
Solution Approach 1:
The patent applies parameter changes by modifying the compression force parameter applied to the electrical shield. By adjusting the magnitude and distribution of compression force (through different foam densities, compressor sizes, or compression ratios), the shield is maintained in constant contact with the racetrack-shaped dielectric core. This parameter adjustment ensures that even with the flat surfaces of the racetrack shape, the shield does not deform discontinuously during bending or twisting, thus maintaining both signal performance and ease of operation.
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 spacers ensure continuous compression of the electrical shield, reducing electrical discontinuities and enhancing signal transmission performance, especially in higher frequency bands.
Implementation Method 1
The spacer can be configured to apply a compressive force to the electrical shield toward the core
Data Source
AI summary
A signal transmission line, such as a waveguide or electrical cable, can include a spacer that bears against an electrical shield so as to provide enhanced structurally stability and increased signal integrity performance. The waveguide can be a hollow or semi-hollow waveguide. The electrical cable can be a coaxial or twinaxial electrical cable.