Foam Dielectric Cable Structure for Lower Insertion Loss
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Solution Overview
Problem
Existing electrical cables face challenges in maintaining signal integrity and mechanical strength due to the limitations of traditional solid dielectric insulators, which affect the transmission of high-frequency signals and the cable's overall performance.
Innovation Solution
The development of an electrical cable with a monolithic inner insulator made of foam, surrounded by an electrically conductive shield and an outer insulator, which reduces the dielectric constant and enhances mechanical strength while maintaining signal integrity through a specific configuration of conductors and insulators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional solid dielectric insulator is used, then mechanical strength is maintained, but signal integrity deteriorates due to higher dielectric constant causing increased insertion loss
Solution Approach 1:
The patent applies porous foam material as the inner electrical insulator instead of traditional solid dielectric. The foam structure reduces the dielectric constant by introducing air pockets throughout the material, which directly lowers the insertion loss for high-frequency signals while maintaining the mechanical strength through the monolithic foam structure.
2Loss of energy
If a monolithic foam insulator is used, then insertion loss is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent combines the inner electrical insulator and the foam structure into a single monolithic component. This integration eliminates the need for separate solid dielectric and foam layers, simplifying the manufacturing process while achieving the low insertion loss benefits of foam material.
3Reliability
If traditional solid dielectric is used, then cable size is larger, but signal transmission performance is poorer
Solution Approach 1:
The patent changes the dielectric constant parameter by using foam material with air pockets instead of solid dielectric. This parameter change allows for reduced cable size while improving signal transmission performance, as the lower dielectric constant reduces signal attenuation and propagation delay.
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 improves signal transmission by reducing insertion loss and allowing for smaller cable sizes while maintaining or exceeding the performance of traditional cables, with reduced propagation delay and improved mechanical strength.
Implementation Method 1
a monolithic inner electrical insulator that includes a foam... reduces the dielectric constant
Data Source
AI summary
Electrical cables and optical waveguides are disclosed as including an electrically insulative foam. The electrically insulative foam can coat at least one electrical conductor of the electrical cable. The electrically insulative foam can coat the optical fiber of the waveguide. The electrically insulative foam can also define a waveguide.