Multiband Antenna Structure with Segmented Radiation Elements
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Solution Overview
Problem
Designing a wideband antenna with sufficient bandwidth to support multiple frequency bands while maintaining a small size is a challenge, as existing antennas often degrade communication quality due to insufficient bandwidth.
Innovation Solution
The proposed antenna structure consists of a first radiation element, a second radiation element, and a third radiation element, with specific shapes and orientations, and openings, which are excited to cover frequency bands including 1575 MHz, 2400-2500 MHz, and 5150-5850 MHz, optimizing size and impedance matching for wideband operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional antenna design is used, then the structure is simple and easy to manufacture, but the bandwidth is insufficient and communication quality degrades
Solution Approach 1:
The antenna is divided into three distinct radiation elements (first, second, and third radiation elements) with different geometrical shapes and orientations. Each element contributes to different frequency bands, allowing the antenna to achieve wideband operation through segmented functional components rather than a single complex structure.
Solution Approach 2:
The antenna structure is designed to universally cover multiple frequency bands (first frequency band around 1575 MHz, second frequency band 2400-2500 MHz, and third frequency band 5150-5850 MHz) using a single integrated structure. The multiple radiation elements work together to provide multi-functional coverage across GPS, WLAN 2.4 GHz, and WLAN 5 GHz bands.
2Volume of moving object
If the antenna size is reduced for small mobile devices, then the device portability is improved, but the bandwidth and radiation efficiency are reduced
Solution Approach 1:
The antenna utilizes three-dimensional spatial arrangement of radiation elements with specific orientations and angles. The first, second, and third radiation elements are positioned at different orientations in space, exploiting the third dimension to achieve wideband performance within a compact planar footprint suitable for small mobile devices.
Solution Approach 2:
Each radiation element has locally optimized geometrical characteristics (rectangular, trapezoidal, and straight-line shapes with specific dimensions and orientations) tailored to resonate at different frequency bands. This local optimization allows each element to contribute effectively to the overall wideband performance while maintaining a compact total structure.
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 antenna structure effectively supports multiband and wideband operations, including GPS and WLAN frequencies, with improved radiation efficiency and impedance matching, suitable for small-size mobile communication devices, and is cost-effective for mass production.
Implementation Method 1
The first radiation element, the second radiation element, and the third radiation element are excited to generate the first frequency band
Data Source
AI summary
An antenna structure includes a first radiation element, a second radiation element, and a third radiation element. The first radiation element has a feeding point. The third radiation element is coupled through the second radiation element to the first radiation element. The third radiation element has a first opening and a second opening which are separate from each other. The antenna structure covers a first frequency band, a second frequency band, and a third frequency band.