Antenna-attached Substrate with Low-Dielectric Holding Layer
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Solution Overview
Problem
Existing antenna devices face instability in maintaining constant distance between antenna elements due to varying dielectric material on the sides of embedded antenna elements, leading to potential misalignment and unstable antenna characteristics.
Innovation Solution
An antenna-attached substrate with a dielectric material having a lower relative dielectric constant than the substrate, where the upper antenna element is fully covered by an antenna-holding layer to maintain consistent dielectric properties and prevent misalignment, featuring a multilayer structure with specific surface roughness and material compositions to enhance adhesion and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the upper antenna element is embedded in the second dielectric plate, then the antenna structure is formed, but the amount of dielectric material on each side surface of the upper antenna element varies depending on the quantity of embedment, causing unstable antenna characteristics
Solution Approach 1:
The patent changes the dielectric constant parameter of the material surrounding the upper antenna element by introducing a low-dielectric constant material (such as air or foam) in the antenna-holding layer, replacing the traditional high-dielectric constant substrate material. This parameter change ensures consistent electromagnetic environment and stable antenna characteristics regardless of embedment variations.
Solution Approach 2:
The patent introduces an antenna-holding layer as an intermediary component with low dielectric constant between the upper and lower antenna elements. This intermediary layer compensates for variations in embedment quantity by providing a consistent low-dielectric environment, thereby stabilizing antenna characteristics.
2Ease of manufacture
If the upper antenna element is disposed on the surface of the second dielectric plate, then the antenna structure is formed, but misalignment of the upper antenna element in a plane direction occurs, causing unstable antenna characteristics
Solution Approach 1:
The patent changes the physical state parameter of the antenna-holding layer material to a foamed or porous structure, which provides mechanical cushioning and positional tolerance. This allows the upper antenna element to be positioned accurately even with slight misalignments, maintaining stable antenna characteristics while preserving assembly simplicity.
Solution Approach 2:
The patent applies beforehand cushioning by using a foamed antenna-holding layer that can absorb positional deviations and misalignments before they affect the antenna characteristics. The compressible foam material compensates for assembly variations, ensuring stable performance.
3Device complexity
If a dielectric spacer is used between the power-supply excitation element and the non-power-supply excitation element, then the antenna structure is formed, but the leg portion is likely to deform, causing variable distance between antenna elements
Solution Approach 1:
The patent changes the mechanical property parameter of the antenna-holding layer by using a foamed or porous material with appropriate elasticity. This material maintains the distance between antenna elements constantly while being resistant to deformation, replacing the traditional dielectric spacer with superior mechanical stability.
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 provides stable antenna characteristics by maintaining consistent dielectric properties and preventing misalignment, improving antenna reliability and reducing electromagnetic wave loss.
Implementation Method 1
The antenna-holding layer is composed of a dielectric material having a relative dielectric constant lower than that of the substrate layer
Data Source
AI summary
An antenna-attached substrate according to the present disclosure includes a substrate layer, a lower antenna element that is disposed in the substrate layer, an antenna-holding layer that is stacked on an upper surface of the substrate layer, and an upper antenna element that is disposed in the antenna-holding layer and that faces an upper surface of the lower antenna element. The antenna-holding layer is composed of a dielectric material having a relative dielectric constant lower than that of the substrate layer. A lower surface, a side surface, and an upper surface of the upper antenna element are covered by the antenna-holding layer.