Resonator Antenna Structure for Wideband Reflection Phase Control
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Solution Overview
Problem
Antennas face a reduction in electromagnetic wave amplitude due to phase-shifted reflections from metallic conductors, which can be mitigated by optimizing the distance between the antenna and the conductor, but existing solutions do not effectively address the issue across various frequency bands.
Innovation Solution
A resonator structure incorporating pair conductors, third conductors functioning as artificial magnetic conductors, and a fourth conductor, configured to resonate at specific frequencies, reduces electromagnetic wave leakage by controlling phase differences and capacitance, thereby maintaining radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between the antenna and metallic conductor is set to 1/4 wavelength, then the influence of reflected waves is reduced, but the solution does not effectively address the issue across various frequency bands
Solution Approach 1:
The patent changes the physical parameter of distance from a fixed 1/4 wavelength to a variable range (0.05λ to 0.2λ) that can be adjusted across different frequency bands. This allows the antenna system to maintain effective reflection mitigation while adapting to various operating frequencies, resolving the contradiction between reliability at a specific frequency and adaptability across frequency bands.
2Reliability
If artificial magnetic conductor is used to reduce reflected wave influence, then radiation efficiency is improved, but the structure becomes more complex
Solution Approach 1:
The patent extracts the essential function of the artificial magnetic conductor (phase control of reflected waves) and implements it using a simplified metallic conductor structure. By removing the complex artificial magnetic conductor while maintaining its reflective phase control function through proper distance positioning, the solution reduces structural complexity while preserving radiation efficiency.
Solution Approach 2:
The patent replaces the complex and expensive artificial magnetic conductor with a simple metallic conductor that is already present in most electronic devices. This substitution uses a readily available, simple component to achieve the same functional effect, thereby reducing device complexity and cost while maintaining performance.
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 proposed resonator structure enhances antenna efficiency by minimizing wave leakage and maintaining radiation efficiency even when metallic objects approach, across a wide range of frequencies.
Implementation Method 1
a structure that resonates at a predetermined frequency
Implementation Method 2
The electromagnetic waves reflected from a metallic conductor have a phase shift of 180°
Data Source
Figure 1~2
Figure 3A~4
Figure 5~6
AI summary
A structure includes first to fourth conductors. The first conductor extends along a second plane including a second direction and a third direction intersecting with the second direction. The second conductor faces the first conductor along a first direction intersecting with the second plane and extends along the second plane. The third conductor capacitively connects the first conductor and the second conductor. The fourth conductor is electrically connected to the first conductor and the second conductor, and extends along a first plane including the first direction and the third direction. The third conductor includes a first conductive layer and a second conductive layer capacitively connected to the first conductive layer. The second conductive layer is positioned between the first conductive layer and the fourth conductor in the second direction. The first conductive layer has more thickness in the second direction as compared to thickness of the second conductive layer.