Gap-Coupled Antenna Layout for Compact Low-Bandwidth Expansion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic devices with limited volume face challenges in optimizing antenna space utilization while expanding bandwidth, as existing antenna structures struggle to effectively utilize available space and cover broader frequency ranges.
Innovation Solution
The proposed antenna structure includes a feeding source, a main radiation portion, a metal portion, and a grounding portion, with specific gaps between these components that allow coupling, enabling expanded low-frequency bandwidth by secondary coupling of the metal and grounding portions with the main radiation portion, and strategically placing the antenna unit around metal components in electronic devices to maximize space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is compressed to fit limited device volume, then the device can be made more compact, but the bandwidth coverage capability deteriorates
Solution Approach 1:
The antenna structure is nested around the speaker assembly, with the radiation element positioned between the speaker and the housing, and the grounding element extending along the speaker's outer periphery. This nesting approach allows the antenna to occupy otherwise wasted space within the device volume while achieving extended bandwidth coverage from 1.4 GHz to 2.69 GHz.
Solution Approach 2:
The antenna structure transitions from traditional planar layouts to a three-dimensional configuration that wraps around the cylindrical speaker assembly. The radiation element extends in a first direction while the grounding element extends in a second direction perpendicular to the first, creating a spatial structure that maximizes bandwidth within limited volume.
2Device complexity
If traditional antenna structures are used, then the design is simple, but the space utilization is insufficient
Solution Approach 1:
The antenna structure serves multiple functions: the radiation element provides electromagnetic radiation while the grounding element extends along the speaker's outer periphery to enhance grounding and expand bandwidth. This multi-functional design allows a single antenna structure to achieve both compact integration and extended frequency coverage without proportionally increasing complexity.
3Volume of moving object
If the antenna is placed in remaining space around the speaker, then space utilization improves, but interference from noise signals increases
Solution Approach 1:
A filter circuit is introduced as an intermediary between the antenna structure and the communication module to suppress noise signals generated by the speaker assembly. The filter circuit selectively attenuates unwanted frequencies while allowing the desired bandwidth (1.4 GHz to 2.69 GHz) to pass through, enabling the antenna to utilize space around the speaker without suffering from noise interference.
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 extends the low-frequency bandwidth of the antenna structure to 1.4 GHz and optimally utilizes the space in electronic devices, while also mitigating interference from noise signals through the use of a filter circuit, thereby enhancing overall performance.
Implementation Method 1
The main radiation portion couples with the metal portion via the first gap
Implementation Method 2
the grounding portion couples with the metal portion via the second gap
Data Source
AI summary
An antenna structure and an electronic device are provided. The antenna structure includes a feeding source, a main radiation portion, a metal portion, and a grounding portion. The main radiation portion is signally connected to the feeding source. There is a first gap between the metal portion and the main radiation portion. There is a second gap between the grounding portion and the metal portion, and there is a third gap between the grounding portion and the main radiation portion. The main radiation portion couples with the metal portion via the first gap, and the grounding portion couples with the metal portion via the second gap.