Shielding Tape Cable Structure for Lower High-Frequency Attenuation
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Solution Overview
Problem
Traditional high-frequency cables suffer from increased attenuation and electrical performance degradation due to the presence of adhesive layers in shielding structures, which are necessary for fixing the shielding layers but contribute to signal loss and interference.
Innovation Solution
A cable design featuring a shielding tape with a glue layer only on the overlapping portions, eliminating glue from the surface areas to reduce signal loss and maintain a stable structure, comprising core wires, a shielding tape with a shielding layer and a glue layer on its outer surface, and an outer insulation layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a layer of adhesive is placed on the surface of the shielding layer to fix the shielding layer to the cable, then the shielding layer is securely fixed to the cable, but the loss factor of the adhesive increases the attenuation and deteriorates the electrical performance of the cable
Solution Approach 1:
The adhesive layer is applied selectively only at the overlapping portions of the shielding tape rather than uniformly across the entire surface. This local application provides sufficient fixation stability at critical locations while minimizing the total adhesive volume that causes signal loss, thereby resolving the contradiction between fixation stability and signal attenuation.
Solution Approach 2:
The shielding tape is designed with segmented adhesive application at discrete overlapping portions rather than continuous adhesive coverage. This segmentation reduces the cumulative loss factor impact while maintaining structural integrity at the tape joints where fixation is most needed.
2Stability of the object's composition
If adhesive is applied uniformly across the entire surface of the shielding layer, then comprehensive fixation is achieved, but the overall attenuation of the cable increases significantly
Solution Approach 1:
Instead of uniform adhesive application, the invention applies adhesive locally only at the overlapping portions of the shielding tape. This localized approach provides adequate fixation at the critical joint areas while minimizing adhesive presence in signal transmission zones, thereby reducing overall cable attenuation while maintaining necessary structural stability.
3Loss of energy
If the glue layer is minimized to improve electrical performance, then signal attenuation is reduced, but the shielding tape structure may become unstable
Solution Approach 1:
The adhesive is concentrated at the overlapping portions where structural stability is most critical, while being absent or minimal in other areas where signal transmission quality is paramount. This spatial differentiation of adhesive distribution optimizes both structural stability and electrical performance simultaneously.
Solution Approach 2:
The adhesive structure is segmented into discrete portions at the tape overlaps rather than continuous coverage. This segmentation provides sufficient mechanical bonding at the joints to ensure shielding tape stability while minimizing the total adhesive volume that would otherwise increase signal loss across the entire cable.
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 solution results in lower overall attenuation and improved electrical performance by minimizing the glue's impact on signal transmission, as evident from reduced differential insertion loss across various frequencies compared to traditional designs.
Implementation Method 1
a cable used to transmit high frequency signals... susceptible to interference from external electromagnetic signals... use a shielding structure to eliminate or reduce the interference of the external electromagnetic field, and to prevent the leakage of the transmission signal
Implementation Method 2
a shielding tape with a shielding layer and a glue layer on its outer surface... the glue layer is only provided on an overlapped portion of the shielding tape
Data Source
AI summary
A cable includes: a pair of core wires; a shielding tape covering the pair of core wires; and an outer insulation layer covering the shielding tape, wherein the shielding tape is longitudinally wrapped around the pair of core wires, the shielding tape includes a shielding layer and a glue layer located on the outer surface of the shielding layer, and the glue layer is only provided on an overlapped portion of the shielding tape.