Resonance Structure Antenna Artificial Magnetic Conductor Phase Shift
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Solution Overview
Problem
Existing antenna designs face a reduction in electromagnetic wave amplitude due to phase shifts caused by reflections 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 resonance structure comprising a conductor part, ground conductor, and pair conductors, where the conductors are capacitively connected to reduce electromagnetic wave leakage and phase shifts, functioning as an artificial magnetic conductor to minimize interference.
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 to reduce reflected wave influence, then the phase shift problem is partially mitigated, but the structure becomes bulky and the amplitude reduction issue persists
Solution Approach 1:
The patent changes the electrical parameters of the conductor by introducing periodic groove structures and varying the conductor's impedance characteristics. This transforms the conductor from a simple reflective surface into an artificial magnetic conductor (AMC) that can control the phase of reflected waves, achieving 0-degree phase shift at the operating frequency without requiring 1/4 wavelength spacing.
Solution Approach 2:
The patent creates a composite structure by combining the ground conductor with periodic groove patterns and dielectric materials. This composite artificial magnetic conductor structure exhibits unique electromagnetic properties that differ from conventional conductors, enabling it to cancel out the phase shift caused by metallic reflections and reduce amplitude loss.
2Reliability
If conventional metallic conductors are used for ground plane, then electrical connectivity is achieved, but electromagnetic wave leakage and phase shifts occur reducing radiation efficiency
Solution Approach 1:
The patent converts the harmful reflective property of metallic conductors into a beneficial feature by designing the ground conductor with periodic groove structures. These grooves create resonant effects that transform the conductor from a source of phase-shifted reflections into an artificial magnetic conductor that produces 0-degree phase shift, thereby eliminating amplitude reduction while maintaining electrical connectivity.
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 enhances the radiation efficiency and axial ratio of circularly polarized waves by reducing electromagnetic wave leakage and phase shifts, thereby maintaining wave amplitude and improving antenna performance.
Implementation Method 1
The conductor part capacitively connects the first pair conductors and capacitively connects the second pair conductors
Implementation Method 2
The electromagnetic waves radiated from an antenna are reflected from a metallic conductor. The electromagnetic waves reflected from a metallic conductor have a phase shift of 180°
Implementation Method 3
A resonance structure according to an embodiment of the present disclosure includes a conductor part, a ground conductor, first pair conductors, and second pair conductors
Data Source
AI summary
A resonance structure includes a conductor part that expands along a first plane including a first direction and a third direction; a ground conductor that expands along the first plane; first pair conductors that electrically connect the conductor part and the ground conductor along a second direction intersecting the first plane and face each other in the first direction; and second pair conductors that electrically connect the conductor part and the ground conductor along the second direction and face each other in the third direction. The conductor part capacitively connects the first pair conductors and capacitively connects the second pair conductors. A first edge and a second edge of the conductor part intersect with each other. The first edge extends in the first direction from one conductor of the first pair conductor. The second edge extends in the third direction from one conductor of the second pair conductors.