Antenna Structure Bandwidth Expansion via Segmented Resonating Elements
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Solution Overview
Problem
Conventional antenna structures face challenges in reducing size while maintaining bandwidth, as folding them narrows the bandwidth and reduces the quality factor, making it difficult to achieve compact dimensions without compromising performance.
Innovation Solution
The introduction of a second resonating point in the antenna structure, coupled with a protruding portion, allows for increased bandwidth by staggering peak frequencies and maintaining or enhancing the quality factor, even when dimensions are reduced through folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna is folded to reduce its size, then the dimensions are reduced, but the bandwidth is narrowed and the quality factor is reduced
Solution Approach 1:
The antenna is divided into multiple segments including a first resonating element, a second resonating element, and a protruding portion. Each segment can be independently configured to contribute to different resonating points, allowing the antenna to maintain bandwidth while being folded into a compact form.
Solution Approach 2:
The antenna structure incorporates a protruding portion that extends in a direction different from the main resonating elements. This dimensional variation creates an additional resonating point without increasing the overall footprint, enabling compact folding while preserving bandwidth.
2Volume of moving object
If the antenna is folded to reduce its size, then the dimensions are reduced, but the quality factor is reduced
Solution Approach 1:
By segmenting the antenna into distinct resonating elements and a protruding portion, each segment maintains its resonating characteristics independently. This segmentation allows the antenna to be folded without degrading the quality factor, as each segment continues to function effectively at its designated resonating point.
Solution Approach 2:
Different portions of the antenna are designed with specific local characteristics - the first and second resonating elements have optimized dimensions for their resonating frequencies, while the protruding portion is designed to create a third resonating point. This local optimization ensures high quality factor even when the overall antenna is compact.
3Length of moving object
If the antenna dimensions are reduced by folding, then compactness is improved, but the bandwidth is narrowed
Solution Approach 1:
The protruding portion extends in a direction perpendicular to the main resonating elements, creating a third resonating point that adds bandwidth without increasing the linear dimensions of the antenna. This dimensional change allows compact folding while maintaining wide bandwidth coverage.
Solution Approach 2:
The antenna structure utilizes multiple resonating points with different resonating frequencies created by varying the dimensions and configurations of different segments. By changing the parameters (length, width, position) of each segment, the antenna achieves wide bandwidth coverage in a compact form.
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 approach effectively doubles the bandwidth of the antenna while maintaining or improving the quality factor, allowing for more compact designs without sacrificing performance.
Implementation Method 1
an antenna structure having a first resonating point, thereby increasing the bandwidth thereof via the second resonating point
Data Source
AI summary
An antenna structure and a method for increasing an antenna bandwidth are provided. The antenna structure includes a feeding portion, a first resonating element electrically connected to the feeding portion, a protruding portion electrically connected to the feeding portion, and a second resonating element coupled with the protruding portion.