Asymmetric Bezel Antenna Layout for Hand-Blocking Resistance
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Solution Overview
Problem
The increasing number of antennas in thinner electronic devices, such as mobile phones, leads to smaller clearance areas and poor free space performance due to hand blocking, affecting radiation performance.
Innovation Solution
An antenna apparatus with a radiator design featuring a feed point and ground conductive members that promote even current distribution, utilizing resonances and ground conductive members to enhance antenna performance, and a flexible bezel configuration for adjustable positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna element is disposed near the bezel to improve antenna system efficiency, then the radiation performance is improved, but the free space performance deteriorates due to hand blocking
Solution Approach 1:
The radiator is divided into two unequal segments by positioning the feed point asymmetrically. The first segment (from feed point to first end) is longer than the second segment (from feed point to second end), allowing the antenna to maintain good radiation performance while reducing hand blocking effects by optimizing current distribution along the radiator.
Solution Approach 2:
Ground conductive members are strategically placed at specific locations along the radiator to create localized effects. The ground conductive members are positioned at distances of 0.15λ to 0.35λ from the first end and 0.05λ to 0.15λ from the feed point, creating localized current distribution optimization that improves both radiation and free space performance.
2Reliability
If multiple radiators are formed on the bezel to support multiple antenna functions, then the antenna system efficiency is improved, but the clearance area becomes smaller
Solution Approach 1:
The bezel structure serves multiple functions: it acts as both the antenna radiator and the structural frame of the electronic device. By forming radiators directly on the bezel, the design eliminates the need for separate antenna structures, thereby maintaining clearance area while supporting multiple antenna functions through different radiator configurations.
Solution Approach 2:
The antenna radiator is merged with the bezel structure, combining the structural support function with the radiation function. This integration allows the antenna to utilize the existing bezel space without requiring additional clearance area, while still supporting multiple radiation elements for different communication functions.
3Reliability
If the feed point is positioned to optimize current distribution, then the radiation performance is improved, but the resonance frequency coverage becomes limited
Solution Approach 1:
The antenna design supports multiple resonant modes that can be dynamically activated depending on the operating frequency requirements. By having an asymmetric structure with specific ground conductive member placements, the antenna can operate in different resonant modes (fundamental mode, higher order modes) to cover different frequency bands, providing dynamic adaptability while maintaining optimized current distribution.
Solution Approach 2:
The antenna system utilizes composite structural elements including the asymmetric radiator, ground conductive members, and feed point configuration to achieve both optimized current distribution and broad frequency coverage. The combination of these elements creates multiple resonant pathways that enable the antenna to maintain good radiation performance across different frequency bands.
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
Improves antenna performance by ensuring even current distribution and reducing interference from hand blocking, while allowing for miniaturization and flexible placement of the antenna.
Implementation Method 1
The radiator is configured to generate two resonances: a first resonance and a second resonance. A frequency of the first resonance is greater than a frequency of the second resonance.
Data Source
AI summary
An antenna apparatus that includes a radiator. The radiator includes a first end and a second end. A feed point and a ground point are disposed on the radiator. A distance between the feed point and the first end is greater than a distance between the feed point and the second end. A first ground conductive member and a second ground conductive member are disposed between the feed point and the first end. One end of each of the first ground conductive member and the second ground conductive member is coupled to the radiator, and the other end of the first ground conductive member and the second ground conductive member is coupled to ground. The radiator is configured to generate two resonances: a first resonance and a second resonance. A frequency of the first resonance is greater than a frequency of the second resonance.