Distributed Filtering Cable Structure for High-Frequency Signal Control
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Solution Overview
Problem
Existing filtering cables lack a simple and reasonable structural design while achieving good filter performance, with issues such as concentrated filtering positions leading to poor performance, increased weight and size, and limited high-frequency filtering capabilities.
Innovation Solution
A filtering cable design featuring a core wire surrounded by N defective conductor layers with etching patterns distributed in the axial direction, which acts as a preset filter circuit to filter signals without additional components, improving coupling and heat dissipation while maintaining a lightweight and temperature-stable structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter connector is installed at one end or both ends of the cable to implement filtering function, then the filtering position is concentrated, but the filtering performance is poor and the connector size and weight increase
Solution Approach 1:
The filtering function is segmented from the connector and distributed along the cable length. Multiple filtering positions are created by embedding filtering structures at intervals along the cable, rather than concentrating filtering at the connector. This distributes the filtering load and improves overall performance without increasing connector complexity.
Solution Approach 2:
The filtering function transitions from a one-dimensional concentrated position at the connector to a distributed arrangement along the cable's length. This spatial redistribution creates multiple filtering zones, enhancing performance while keeping each individual filtering element compact.
2Reliability
If suspended filter circuits with lumped components are used, then the filter circuit can be installed near the connector, but the high-frequency filtering performance is weak and heat dissipation is poor
Solution Approach 1:
Traditional lumped-component filter circuits are replaced with a distributed filtering structure that integrates directly into the cable's conductor layers. This substitution eliminates the need for discrete components, improving high-frequency performance and heat dissipation through the cable's inherent thermal pathways.
Solution Approach 2:
The filtering structure utilizes composite construction with conductive and insulating materials integrated into the cable layers. This composite approach enables effective electromagnetic filtering while providing thermal management through the multi-material structure, improving heat dissipation compared to traditional lumped components.
3Reliability
If ceramic feed-through filters are independently installed on the core wire, then filtering function is achieved, but the cable size and weight increase significantly
Solution Approach 1:
The filtering function is merged with the cable's existing conductor layers rather than being independently installed. The filtering structures are integrated into the insulation layers surrounding the core wires, combining multiple functions (conduction, insulation, and filtering) into a unified structure that adds minimal weight.
Solution Approach 2:
The filtering structures utilize thin-film or layered constructions that can be integrated into the cable's insulation layers. This approach provides effective filtering with minimal additional mass, unlike bulky ceramic feed-through filters, while maintaining flexibility and structural integrity.
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 cable achieves effective electromagnetic signal filtering with improved reliability and heat dissipation, ensuring normal power or signal transmission without excessive weight or size increase, and maintains performance under bending and temperature variations.
Implementation Method 1
the etching pattern is used to make the filtering cable equivalent to a preset filter circuit to filter the signal transmitted in the filtering cable
Implementation Method 2
a shielding layer is provided in the cable. The shielding layer comprises a typical aluminum film shielding layer and a copper braided mesh nickel-plated shielding layer
Data Source
AI summary
The present application discloses a filtering cable, which solves the problem that the cable in the related art cannot ensure a simple and reasonable structural design while having good filter performance. One or several core wires and N defective conductor layers surrounding the core wires are sequentially provided from inside to outside in the cross section in the radial direction of the filtering cable; wherein the defective conductor layer has an etching pattern; the etching pattern is distributed in the axial direction of the filtering cable; the etching pattern is used to make the filtering cable equivalent to a preset filter circuit to filter the signal transmitted in the filtering cable.