Corner Terminal Antenna Inductor Layout for Limited-Space Radiation
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Solution Overview
Problem
Existing antenna solutions in electronic devices face challenges in providing good radiation performance in environments with limited space, leading to poor wireless communication functionality.
Innovation Solution
A terminal antenna design with a first radiator connected through an inductor to a ground point and optionally a second inductor, arranged in an L-shape at a corner of the device, adjusts the electric field distribution to achieve uniform radiation, allowing for good performance in confined spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna is placed in a limited space environment, then the device size is reduced, but the radiation performance deteriorates
Solution Approach 1:
The patent changes the electrical parameters by introducing inductors to modify the impedance characteristics and resonant frequency of the antenna. The first inductor L1 connected in series with the radiator and the second inductor L2 connected in parallel enable the antenna to achieve proper impedance matching and resonance in a compact structure, thereby maintaining good radiation performance despite the reduced volume.
Solution Approach 2:
The patent introduces inductors as intermediary components between the radiator and ground. These inductors act as mediators to adjust the electrical characteristics, enabling the compact antenna structure to achieve the desired radiation performance by controlling the current distribution and impedance without requiring a large physical space.
2Device complexity
If the antenna structure is simplified, then the device complexity is reduced, but the radiation performance deteriorates
Solution Approach 1:
The patent uses inductors to change the electrical parameters of the simplified antenna structure. By adjusting the inductance values of L1 and L2, the antenna achieves proper impedance matching and resonant frequency without requiring a complex multi-element structure, thus maintaining radiation performance while keeping the structure simple.
3Reliability
If the inductor value is increased, then the impedance matching is improved, but the bandwidth is reduced
Solution Approach 1:
The patent segments the impedance matching function into two independent inductors: L1 for series impedance adjustment and L2 for parallel impedance adjustment. This segmentation allows independent optimization of impedance matching at different frequencies, thereby achieving good matching across a broader bandwidth without compromising either parameter.
Solution Approach 2:
The patent creates a dynamically adjustable impedance matching network where the inductors can be tuned to different values. This dynamic capability allows the antenna to maintain optimal impedance matching across a wide frequency range, effectively expanding the operational bandwidth while preserving matching quality.
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 design ensures balanced current distribution and uniform electric field distribution, enhancing radiation performance and bandwidth in low-frequency operations, even in limited spaces.
Implementation Method 1
The first ground point is connected to the first radiator through a first inductor, and a value of the first inductor is included within a range of [5 nH, 47 nH]
Data Source
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AI summary
Embodiments of this application relate to the field of antenna technologies, and disclose a terminal antenna and an electronic device, which can provide good radiation performance in a poor environment. The terminal antenna includes a first radiator, the first radiator is provided with a first feed and a first ground point, and the first ground point is arranged at an end of the first radiator. The first ground point is connected to the first radiator through a first inductor, and a value of the first inductor is included within a range of [5 nH, 47 nH].