Transparent Antenna Feed Structure for Compact Low-Coupling Layouts
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Solution Overview
Problem
The increasing number of communication base stations in the 5G era raises concerns about electromagnetic radiation, and there is a need for antennas that provide high electrical performance and aesthetic appeal while being transparent and concealed.
Innovation Solution
An antenna design incorporating a flexible circuit board and a substrate with specific conductive layers and feed lines, including isolation components and openings, to enhance electrical performance and reduce coupling, while maintaining transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a conventional antenna design is used, then the antenna provides basic communication function, but the antenna occupies significant space and compromises aesthetic appearance
Solution Approach 1:
The antenna is divided into multiple independent feed lines (first feed line and second feed line) with different feed directions, each capable of operating independently. This segmentation allows the antenna to maintain compact size while providing multiple communication functions, resolving the contradiction between small area and manufacturing complexity.
Solution Approach 2:
The patent utilizes the thickness dimension of the substrate by positioning conductive layers at different depths (first conductive layer and second conductive layer). This three-dimensional arrangement allows multiple feed lines to coexist in a compact planar area, achieving miniaturization without excessive manufacturing complexity.
2Area of stationary object
If multiple feed lines are arranged closely to reduce antenna size, then the antenna area is reduced, but coupling between feed lines increases
Solution Approach 1:
A third conductive layer is introduced as an intermediary between the first and second conductive layers. This intermediate layer acts as a shielding barrier that reduces electromagnetic coupling between the closely spaced feed lines, enabling compact antenna design while maintaining low coupling levels.
Solution Approach 2:
The patent applies different conductive layer configurations at different locations: the first and second conductive layers contain feed lines, while the third conductive layer is positioned specifically to provide shielding where coupling occurs. This localized quality differentiation reduces coupling without requiring complete separation of all feed lines.
3Illumination intensity
If the antenna structure is made transparent for aesthetic purposes, then the aesthetic appeal is improved, but the electrical performance may deteriorate
Solution Approach 1:
The antenna uses a composite structure combining dielectric substrate material with metallic conductive layers. The dielectric substrate provides transparency and aesthetic appearance, while the metallic conductive layers embedded within provide the necessary electrical conductivity for antenna operation, achieving both transparency and reliable electrical performance.
Solution Approach 2:
The conductive layers are nested within the dielectric substrate structure, with the first, second, and third conductive layers positioned at different depths within the substrate thickness. This nesting allows the transparent substrate to maintain its aesthetic appearance while containing the electrical components necessary for antenna function.
Data Source
AI summary
An antenna and an electronic device are provided and belong to communication technology. The antenna includes an antenna substrate and a flexible circuit board. The antenna substrate includes: a first dielectric substrate, a first conductive layer on the first dielectric substrate and including at least one first feed line and at least one second feed line; a second conductive layer on a side of the first dielectric substrate away from the first conductive layer and including at least one first opening. The flexible circuit board includes: a second dielectric substrate and a third dielectric substrate opposite to each other; a third conductive layer between the second dielectric substrate and the third dielectric substrate; a first feed structure on a side of the second dielectric substrate away from the third conductive layer; each second feed port of the first feed structure being electrically connected to a corresponding first feed line.