Electromagnetic Wave Absorption Cable With Scratched Metal Films
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Solution Overview
Problem
Conventional electromagnetic wave shielding and absorption cables are thick and expensive due to their two-layer structure, making it difficult to create thinner, cost-effective solutions for suppressing electromagnetic wave radiation and intrusion in complex electronic appliances.
Innovation Solution
The use of laterally partially overlapping electromagnetic-wave-absorbing films with single- or multi-layer thin metal films and parallel, intermittent linear scratches on plastic films, spirally wound around conductor wires, to form an electromagnetic-wave-absorbing tape with specific overlap and angle configurations, which effectively absorbs electromagnetic waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a two-layer structure comprising electromagnetic-wave-shielding layer and electromagnetic-wave-absorbing layer is used, then electromagnetic wave radiation and intrusion are suppressed, but the cable becomes thick and expensive
Solution Approach 1:
The patent combines the electromagnetic wave shielding function and absorption function into a single integrated layer structure. The electromagnetic-wave-absorbing/shielding layer incorporates both high-conductivity metal particles (for shielding) and high-permeability magnetic particles (for absorption) within the same layer, eliminating the need for separate shielding and absorbing layers while achieving both functions simultaneously.
Solution Approach 2:
The patent uses a composite material approach by formulating the electromagnetic-wave-absorbing/shielding layer with a mixture of metal particles and magnetic particles in specific proportions. This composite structure allows the single layer to exhibit both shielding properties (from conductive metal particles) and absorption properties (from magnetic particles), resolving the contradiction between functionality and thickness.
2Object-affected harmful factors
If a two-layer structure comprising electromagnetic-wave-shielding layer and electromagnetic-wave-absorbing layer is used, then electromagnetic wave radiation and intrusion are suppressed, but the cable becomes expensive
Solution Approach 1:
The patent combines the electromagnetic wave shielding function and absorption function into a single integrated layer structure. The electromagnetic-wave-absorbing/shielding layer incorporates both high-conductivity metal particles (for shielding) and high-permeability magnetic particles (for absorption) within the same layer, eliminating the need for separate shielding and absorbing layers while achieving both functions simultaneously.
Solution Approach 2:
The patent uses a composite material approach by formulating the electromagnetic-wave-absorbing/shielding layer with a mixture of metal particles and magnetic particles in specific proportions. This composite structure allows the single layer to exhibit both shielding properties (from conductive metal particles) and absorption properties (from magnetic particles), resolving the contradiction between functionality and thickness.
3Object-affected harmful factors
If conventional electromagnetic wave shielding structures are used, then electromagnetic wave suppression is achieved, but the cable structure becomes complex and difficult to make thin
Solution Approach 1:
The patent combines the electromagnetic wave shielding function and absorption function into a single integrated layer structure. The electromagnetic-wave-absorbing/shielding layer incorporates both high-conductivity metal particles (for shielding) and high-permeability magnetic particles (for absorption) within the same layer, eliminating the need for separate shielding and absorbing layers while achieving both functions simultaneously.
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 allows for efficient suppression of electromagnetic wave radiation and intrusion while maintaining a thin and cost-effective cable structure, suitable for various electronic applications.
Implementation Method 1
a thin metal film being provided with large numbers of substantially parallel, intermittent, linear scratches
Implementation Method 2
electromagnetic-wave-absorbing film comprising a plastic film, and a single- or multi-layer, thin metal film
Implementation Method 3
the linear scratches in each electromagnetic-wave-absorbing film having an acute crossing angle θs in a range of 30-90°
Data Source
Figure 1~3
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Figure 6~8
AI summary
An electromagnetic wave absorption cable comprising an electromagnetic-wave-absorbing tape spirally wound around the inner insulating sheaths surrounding conductor wires, an insulating layer, and an electromagnetic-wave-reflecting layer; the electromagnetic-wave-absorbing tape being constituted by laterally partially overlapped two electromagnetic-wave-absorbing films; a thin metal film of each electromagnetic-wave-absorbing film being provided with large numbers of substantially parallel, intermittent, linear scratches with irregular widths and intervals in plural directions; the linear scratches in each electromagnetic-wave-absorbing film having a crossing angle θs of 30-90°; the linear scratches in both electromagnetic-wave-absorbing films being crossing; and the total (D2 + D3) of the longitudinal width D2 of an overlapped portion of the electromagnetic-wave-absorbing films and the longitudinal width D3 of an overlapped portion of the electromagnetic-wave-absorbing tape being 30-70% of the longitudinal width D of the electromagnetic-wave-absorbing tape.