Composite Antenna Substrate With Controlled Density Uniformity
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Solution Overview
Problem
Existing microstrip patch antennas face issues with uneven distribution of fillers and reinforcing materials in substrates, leading to deviations in wavelengths between radio waves and inadequate interference effects.
Innovation Solution
A plate-shaped composite material with controlled density variations and specific dielectric constants, ensuring standard deviations of densities and filler contents are within certain ranges, thereby enhancing the interference effect between antenna elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If fillers and reinforcing materials are blended into the substrate to improve mechanical and electrical properties, then the strength and dielectric properties are improved, but the distribution becomes uneven leading to wavelength deviation
Solution Approach 1:
The patent applies parameter changes by controlling the standard deviation of filler content and density within specific ranges (standard deviation of filler content ≤ 1.0 mass%, standard deviation of density ≤ 0.027 g/cm³). This quantitative control transforms the manufacturing process from qualitative blending to precision-controlled distribution, resolving the contradiction between achieving sufficient filler incorporation for mechanical strength and maintaining uniform distribution for wavelength consistency.
Solution Approach 2:
The patent implements local quality control by specifying that different regions of the substrate must meet particular density and filler content uniformity requirements. By dividing the substrate into multiple measurement regions and controlling the standard deviation across these regions, the invention ensures that each local area maintains consistent electromagnetic properties, preventing wavelength deviation while preserving overall mechanical strength.
2Loss of energy
If fillers are blended into the substrate to improve electrical properties, then the loss tangent is reduced, but the interference effect between antenna elements is insufficient due to wavelength deviation
Solution Approach 1:
The patent uses parameter changes by establishing specific thresholds for filler content standard deviation (≤ 1.0 mass%) and density standard deviation (≤ 0.027 g/cm³). These parameter controls ensure that the substrate maintains consistent electromagnetic properties across all regions, enabling the interference effect between antenna elements to function properly while preserving the low loss tangent achieved through filler incorporation.
3Reliability
If the substrate material is designed for high directivity through interference effect, then the antenna performance is improved, but the wavelength deviation prevents sufficient interference effect
Solution Approach 1:
The patent resolves this contradiction by changing the manufacturing parameters to control filler distribution uniformity. By limiting the standard deviation of filler content to ≤ 1.0 mass% and density to ≤ 0.027 g/cm³, the invention ensures wavelength consistency across the substrate, enabling the interference effect to achieve the desired high directivity performance.
Solution Approach 2:
The patent replaces mechanical mixing processes with precision-controlled distribution methods that achieve uniform filler placement. This substitution transforms the approach from relying on mechanical blending (which creates variability) to using controlled distribution techniques that ensure wavelength consistency, thereby enabling reliable interference effects for high directivity.
Data Source
AI summary
Provided is a plate-shaped composite material which can sufficiently exhibit an interference effect between antenna elements when utilized as, for example, a substrate of a microstrip patch antenna. The interference effect between the antenna elements can be sufficiently exhibited by controlling the composite material so that, when the material is divided into a plurality of regions, a standard deviation of density values of the respective regions is kept at a certain value or less.