Non-Resonant Antenna Layout for Low-Frequency Radiation Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of improving antenna performance, particularly low-frequency performance, in a limited space environment is exacerbated by the trend towards full-screen mobile devices, where available space is constrained, leading to deteriorating radiation environments and increased radiator sizes, which affects user experience.
Innovation Solution
An antenna apparatus with a non-resonant unit and a feed unit is designed to excite a floor characteristic mode, where the non-resonant unit is smaller than ⅛λ, allowing it to assist in enhancing radiation efficiency without generating new resonances, thereby improving antenna performance without occupying excessive design space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radiator size is increased to improve low-frequency antenna performance, then the radiation efficiency is improved, but the occupied design space increases excessively
Solution Approach 1:
The antenna system is divided into two independent parts: a radiation unit for signal radiation and a non-resonant unit for assisting excitation. This segmentation allows each unit to have optimized dimensions - the radiation unit can be compact while the non-resonant unit provides the necessary excitation assistance without requiring large space, thus resolving the contradiction between antenna performance and design space occupation.
Solution Approach 2:
A non-resonant unit is introduced as an intermediary element between the feed unit and the radiation unit. This non-resonant unit assists in exciting the floor characteristic mode and improves radiation efficiency without resonating itself, thereby enhancing antenna performance without occupying excessive design space.
2Adaptability or versatility
If multiple antenna structures are arranged at different spatial positions to meet antenna requirements, then the antenna performance in different scenarios is improved, but the occupied design area increases
Solution Approach 1:
The antenna apparatus integrates multiple functions into a single compact structure. The radiation unit can operate across different frequency bands (including low frequencies) while the non-resonant unit assists in exciting floor characteristic modes, providing universal adaptability for different communication scenarios without requiring multiple separate antenna structures distributed throughout the device.
3Reliability
If the non-resonant unit size is increased to improve radiation efficiency, then the floor characteristic mode excitation is enhanced, but new resonance points are generated that affect the resonance curve
Solution Approach 1:
The size parameter of the non-resonant unit is specifically controlled to be less than 1/8λ (where λ is the wavelength corresponding to the resonance frequency of the radiation unit). This parameter constraint ensures the non-resonant unit can effectively assist in exciting floor characteristic modes and improve radiation efficiency while avoiding the generation of new resonance points that would distort the resonance curve, thus maintaining manufacturing precision and resonance stability.
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 solution enhances radiation efficiency by exciting floor characteristic modes, ensuring high antenna performance across different frequency bands without altering existing resonance curves, thus improving user experience.
Implementation Method 1
the feed unit directly feeds the radiation unit and the non-resonant unit separately... the non-resonant unit can assist in exciting a floor characteristic mode
Data Source
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.