Cable Antenna Spacing Layer for Shielding Interference
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Solution Overview
Problem
Cables lacking shielding in existing designs fail to effectively couple antenna units with read/write devices due to electromagnetic interference from the shielding, which weakens the electromagnetic field and impairs data transmission.
Innovation Solution
Incorporating a spacing layer between the antenna unit and the shielding, which can be electrically nonconducting or magnetically conductive, to maintain or concentrate the electromagnetic field, allowing for better coupling between the antenna unit and the read/write device, even when the shielding is present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielding is added to the cable to protect against electromagnetic interference, then the shielding effectiveness is improved, but the coupling between the antenna unit and read/write device deteriorates due to eddy currents weakening the electromagnetic field
Solution Approach 1:
A spacing layer is introduced as an intermediary component between the antenna unit and the shielding. This spacing layer acts as a mediator that prevents direct interaction between the electromagnetic field and the conductive shielding, thereby eliminating eddy current formation while maintaining the shielding's protective function against external electromagnetic interference.
Solution Approach 2:
The space between the antenna unit and shielding is segmented into a distinct spacing layer with specific material properties. This segmentation creates a functional zone that is electrically nonconductive or magnetically conductive, separating the antenna field region from the shielding structure and preventing harmful eddy current paths.
2Volume of moving object
If the antenna unit is placed closer to the shielding to reduce cable geometry, then the cable compactness is improved, but the electromagnetic field coupling deteriorates due to eddy currents in the shielding
Solution Approach 1:
The spacing layer serves as a protective intermediary that enables close placement of the antenna unit to the shielding without direct field-shielding interaction. This mediator allows compact cable design while preventing eddy current formation that would otherwise occur at close distances, thereby maintaining data transmission reliability.
Solution Approach 2:
The electrical properties of the spacing layer are specifically chosen (electrically nonconductive or magnetically conductive) to change the electromagnetic interaction parameters between the antenna unit and shielding. This parameter change allows reduced spacing distance while maintaining field coupling effectiveness and preventing eddy currents.
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 enables effective coupling of the antenna unit with the read/write device by maintaining or concentrating the electromagnetic field, thereby enhancing data transmission efficiency and reducing eddy currents that weaken the field, even at closer distances to the shielding.
Implementation Method 1
the electromagnetic field that couples to the antenna unit and passes through the antenna surface can extend between the antenna unit and the shielding
Implementation Method 2
the spacing layer is formed at least partially such that it concentrates the magnetic field that couples to the antenna unit
Implementation Method 3
a magnetic-field-concentrating layer can be produced particularly advantageously if it comprises magnetically conductive particles
Implementation Method 4
an electrical shielding of the cable
Data Source
AI summary
In order to improve a cable, comprising an inner cable body, in which at least one conductor strand of an optical and/or electrical conductor runs in the longitudinal direction of the cable, an outer cable sheath, enclosing the inner cable body and lying between an outer sheath surface of the cable and the inner cable body, and at least one information carrier unit, disposed within the outer sheath surface of the cable such that the cable also comprises a shielding, the invention proposes that the information carrier unit having an antenna unit lying in an antenna surface running approximately parallel to the longitudinal direction of the cable, by the antenna surface running at a distance from an electrical shielding of the cable and by providing, between the antenna surface and the shielding, a spacing layer, in which the electromagnetic field that couples to the antenna unit and passes through the antenna surface can extend between the antenna unit and the shielding.