Antenna Structure With Artificial Magnetic Conductor For Wave Interference
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Solution Overview
Problem
Existing antenna designs face issues with amplitude reduction due to phase-shifted reflected electromagnetic waves from metallic conductors, which can be mitigated by optimizing the distance between the antenna and the conductor, but this approach has limitations in effectively managing the interference.
Innovation Solution
A structure comprising a base with pair conductors, third conductors, and a fourth conductor, where the third conductors are capacitively connected and extend along specific planes, functioning as an artificial magnetic conductor to minimize interference by creating a phase difference of 0 degrees between incident and reflected waves, thereby maintaining radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
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 structure complexity increases and manufacturing precision requirements increase
Solution Approach 1:
The patent introduces a dielectric member as an intermediary substance between the antenna and the metallic conductor. This dielectric member has a specific permittivity that enables it to control the phase of reflected electromagnetic waves, converting the harmful 180° phase shift into a 0° phase shift. By using this intermediary dielectric material, the system achieves effective cancellation of reflected waves without requiring precise 1/4 wavelength spacing, thereby reducing structural complexity and manufacturing precision requirements while still eliminating the harmful effects of reflections.
2Reliability
If the distance between the antenna and metallic conductor is optimized, then the amplitude of radiated electromagnetic waves is maintained, but the adaptability to different metallic conductor positions decreases
Solution Approach 1:
The patent changes the key parameter from geometric distance to material property (permittivity). Instead of relying on a fixed 1/4 wavelength distance that only works for specific positions, the invention uses a dielectric member with specifically selected permittivity values. This parameter change allows the system to maintain consistent performance across varying distances and positions of metallic conductors, as the dielectric material's electromagnetic properties compensate for positional variations, thereby improving adaptability while maintaining reliable amplitude.
3Object-generated harmful factors
If a dielectric member with specific permittivity is introduced, then the phase difference of reflected waves is changed from 180° to 0°, but the device complexity increases
Solution Approach 1:
The patent extracts the phase control function from the geometric configuration (1/4 wavelength spacing) and transfers it to the material property of the dielectric member. By doing so, the complex spatial arrangement is replaced with a simpler dielectric component that inherently provides the desired phase transformation. This extraction of the phase control mechanism from the geometric structure reduces overall device complexity while achieving the same harmful factor elimination.
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 structure effectively reduces interference from reflected waves, maintaining the amplitude of radiated electromagnetic waves even when a metallic plate approaches, ensuring consistent radiation efficiency.
Implementation Method 1
The third conductor is configured to capacitively connect the first conductor and the second conductor
Implementation Method 2
The base includes a plurality of first fiber components and a first resin component that holds the first fiber components
Implementation Method 3
The electromagnetic waves reflected from a metallic conductor have a phase shift of 180°. The proposed structure creates a phase difference of 0 degrees between incident and reflected waves
Data Source
AI summary
A structure includes first to a first conductor, a second conductor, a third conductor, and a fourth conductor. 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 faces the fourth conductor via a base. The base includes a plurality of first fiber components and a first resin component that holds the first fiber components. Part of the first fiber components extends along the first direction.