Non-Resonant Antenna Feeding for Low-Frequency Radiation Efficiency
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Solution Overview
Problem
The challenge is to enhance antenna performance, particularly low-frequency antenna performance, in a limited space environment without occupying excessive design area, while maintaining radiation efficiency and user experience in mobile devices.
Innovation Solution
The solution involves an antenna apparatus with a non-resonant unit and a feed unit that feeds the radiation unit, where the non-resonant unit is smaller than 1/8λ, assisting in exciting a floor characteristic mode without generating a resonance curve, thereby improving radiation efficiency without increasing space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different antenna structures are designed at different spatial positions to meet antenna requirements in different scenarios, then antenna performance is improved, but the design area occupied becomes excessive
Solution Approach 1:
The patent applies multi-functionality by enabling a single antenna structure to serve multiple frequency bands and operational scenarios simultaneously. The antenna is designed with multiple resonant modes that can be selectively activated, allowing one antenna to replace what would traditionally require multiple separate antennas at different positions, thereby reducing the occupied design area while maintaining comprehensive antenna performance.
Solution Approach 2:
The patent merges multiple antenna functions into a single integrated antenna structure. By combining multiple resonant elements and feeding mechanisms into one unified antenna design, the patent achieves the functionality of multiple separate antennas while occupying a compact design area, thus resolving the contradiction between comprehensive antenna performance and space efficiency.
2Reliability
If the radiator length is increased to improve low-frequency antenna performance, then antenna performance is improved, but the space requirement increases
Solution Approach 1:
The patent employs dimensionality change by transitioning from traditional linear radiator designs to a multi-dimensional resonant structure. The antenna utilizes three-dimensional resonant modes and spatial distribution of current paths, allowing low-frequency resonance to be achieved through volumetric resonance rather than extended linear length. This enables compact radiator dimensions while maintaining low-frequency antenna performance.
Solution Approach 2:
The patent applies parameter changes by modifying the resonant characteristics of the antenna structure through controlled impedance transformations and resonant frequency tuning. By adjusting electrical parameters such as capacitance, inductance, and resonant mode selection, the antenna achieves low-frequency performance without requiring proportionally increased physical radiator length, thus resolving the contradiction between performance and size.
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
This design effectively enhances radiation efficiency for both low-frequency and medium-high frequency antennas, improving user experience by maintaining high efficiency without adding new resonance points or space, thus addressing the limitations of existing antenna designs in compact spaces.
Implementation Method 1
the non-resonant unit is smaller than 1/8λ, assisting in exciting a floor characteristic mode without generating a resonance curve
Data Source
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AI summary
Embodiments of this application provide an antenna apparatus and an electronic device. The antenna apparatus is provided with a non-resonant unit and a feed unit, to respectively feed a radiation unit and a non-resonant unit. Through feeding power distribution design, the non-resonant unit can assist in exciting a floor characteristic mode. In addition, since a size of the non-resonant unit is much smaller than an electrical length required for resonance of an antenna on this frequency band, the non-resonant unit does not generate a resonance curve on a resonance curve and has no resonance point, to improve radiation efficiency of the antenna without generating new resonance, so as to improve a use effect of a user.