Dual-Path Resonant Antenna Structure for Reflected Wave Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing antenna designs face challenges with reduced amplitude and efficiency due to electromagnetic waves being reflected by metal conductors, leading to phase shifts and interference, which affects the emission efficiency.
Innovation Solution
A resonant structure comprising a conducting portion, ground conductor, and connecting conductors is designed to resonate at specific frequencies, utilizing an artificial magnetic conductor character to minimize the impact of reflected waves, enhancing emission efficiency by configuring the structure to operate as an antenna or filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the distance between the antenna and metal conductor is set to 1/4 of the wavelength, then the effect of reflected waves is reduced, but the amplitude of emitted electromagnetic waves decreases due to phase shift interference
Solution Approach 1:
A dielectric layer is introduced as an intermediary between the antenna and the metal conductor. This dielectric layer modifies the electromagnetic field distribution and phase characteristics, allowing the antenna to operate at optimal distance from the metal surface while maintaining high radiation efficiency and reducing reflected wave interference.
Solution Approach 2:
The patent optimizes the distance between the antenna and metal conductor to be between 0.05λ to 0.15λ (deviating from the conventional 0.25λ), and adjusts the dielectric constant and thickness of the intermediate layer to achieve optimal performance. This parameter optimization resolves the contradiction by finding a new operating point that balances reflected wave reduction with amplitude maintenance.
2Productivity
If artificial magnetic conductor technique is used to reduce reflected waves, then emission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent extracts and utilizes the natural magnetic conductor properties of the metal conductor itself through optimized positioning and intermediate layer design, rather than implementing complex artificial magnetic conductor structures. This approach achieves high emission efficiency while maintaining structural simplicity.
Solution Approach 2:
By optimizing the distance parameter (0.05λ-0.15λ) and dielectric layer characteristics, the patent achieves efficient operation without requiring complex artificial magnetic conductor structures, thus improving emission efficiency while avoiding increased device complexity.
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 resonant structure effectively reduces the impact of reflected waves, maintaining high emission efficiency by resonating at specific frequencies and polarizing electromagnetic waves, thereby improving antenna performance.
Implementation Method 1
The resonant structure is configured to resonate at a first frequency along a first current path and to resonate at a second frequency along a second current path
Implementation Method 2
Electromagnetic waves emitted from an antenna are reflected by a metal conductor. A 180 degree phase shift occurs in the electromagnetic waves reflected by the metal conductor
Data Source
AI summary
A resonant structure includes a conducting portion extending along a first plane and including first conductors, a ground conductor located away from the conducting portion and extending along the first plane, and a first predetermined number of connecting conductors extending from the ground conductor towards the conducting portion. At least two first conductors are connected to different connecting conductors. A first connecting pair of two of the connecting conductors is aligned along a first direction in the first plane and a second connecting pair of two of the connecting conductors is aligned along a second direction, in the first plane, intersecting the first direction. The resonant structure resonates at a first frequency along a first current path including the ground conductor, conducting portion, and first connecting pair and at a second frequency along a second current path including the ground conductor, conducting portion, and second connecting pair.