Compact Antenna Radiator Layout With Inductors for Higher Efficiency
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Solution Overview
Problem
The challenge in wireless communication devices is to enhance antenna radiation efficiency while maintaining a compact design, especially with the increasing demand for high-speed data transmission and the need for multiple antennas to accommodate various communication specifications.
Innovation Solution
The proposed solution involves an electronic device with a radiator, a ground plane, and inductors disposed between the radiator and the ground plane. The inductors are strategically connected to disperse current density on the radiator, reducing conductor loss and improving radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If antenna miniaturization is implemented to meet compact device requirements, then device size is reduced, but radiation efficiency deteriorates due to limited space for antenna layout
Solution Approach 1:
The patent introduces inductors connected between the radiator and ground plane, transforming the traditional planar antenna layout into a three-dimensional structure with vertical components. This dimensional change allows the antenna to achieve larger effective radiation aperture and better current distribution within a compact footprint, thereby improving radiation efficiency without increasing device volume.
Solution Approach 2:
The patent modifies the electrical parameters of the antenna system by introducing inductors with specific inductance values (≤ first threshold). These parameter changes alter the current distribution characteristics and resonance properties of the antenna, enabling improved radiation efficiency while maintaining the compact physical dimensions required for miniaturization.
2Adaptability or versatility
If multiple antennas are deployed to accommodate various communication specifications, then communication functionality is improved, but antenna clearance is reduced and space for layout is limited
Solution Approach 1:
The patent employs a nested structure where inductors are integrated within the antenna assembly, connecting the radiator to the ground plane in a space-efficient manner. This nesting approach allows multiple antenna elements to be closely spaced without interfering with each other's radiation patterns, thereby maintaining antenna clearance and layout space while supporting multiple communication functions.
3Loss of energy
If inductors are disposed between radiator and ground plane to improve radiation efficiency, then conductor loss is reduced, but device complexity increases
Solution Approach 1:
The patent applies inductors at specific locations between the radiator and ground plane rather than uniformly across the entire structure. This localized application targets the areas where current density is highest and conductor loss is most significant, effectively reducing energy loss while minimizing the increase in structural complexity to only the necessary components and connections.
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 configuration effectively expands the radiation aperture, reduces conductor loss, and enhances the overall radiation efficiency of the antenna structure, addressing the limitations of antenna miniaturization in compact electronic devices.
Implementation Method 1
the first inductor and the second inductor are electrically connected between the radiator and the ground plane at the first connection point and the second connection point respectively, a current on the radiator is reversed in areas near the first connection point and the second connection point
Data Source
AI summary
An electronic device has a radiator including a first end, a second end, a ground point, a first connection point, and a second connection point. The ground point is disposed in a central area of the radiator. A length of the radiator is greater than three-quarters of a first wavelength which is a medium wavelength of a first resonance generated by the radiator. A first inductor is electrically connected between the first connection point and the ground plane, and a second inductor is electrically connected between the second connection point and the ground plane, inductance values of the inductors are less than or equal to a first threshold. A distance between the first connection point and the first end is less than a quarter of the first wavelength, and the second connection point is located between the first connection point and the second end.