Multi-Element Antenna Structure for Compact Wideband Coverage
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Solution Overview
Problem
Designing a small-size, wideband antenna that can effectively cover various wireless communication frequency bands without degrading communication quality is a critical challenge, especially for mobile devices that require coverage across multiple systems like 2G, 3G, LTE, Wi-Fi, Bluetooth, and WiMAX.
Innovation Solution
The proposed antenna structure includes a ground plane, feeding connection element, first, second, third, and shorting radiation elements, made of metal materials, disposed on a dielectric substrate, with specific shapes and configurations that allow for efficient impedance matching and mutual coupling, enabling coverage across multiple frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If conventional antenna designs are used to cover multiple frequency bands, then bandwidth is sufficient, but antenna size becomes large
Solution Approach 1:
The antenna is divided into multiple independent radiation elements (first, second, third, and shorting radiation elements), each contributing to different frequency bands. This segmentation allows the total antenna area to be distributed across multiple functional components rather than requiring a single large structure, thereby reducing the overall footprint while maintaining wideband coverage capability.
Solution Approach 2:
The radiation elements are arranged in a nested configuration where the third radiation element partially surrounds the second radiation element, and the shorting radiation element is positioned between the feeding connection and the third radiation element. This nesting approach allows multiple radiation patterns to coexist in a compact space, enabling wideband operation without increasing the external dimensions of the antenna.
2Area of moving object
If antenna size is reduced for small mobile devices, then device compactness is improved, but bandwidth coverage deteriorates
Solution Approach 1:
The antenna structure is designed to perform multiple functions simultaneously through its various radiation elements. The first and second radiation elements handle certain frequency bands while the third radiation element and shorting radiation element contribute to others, allowing a single compact antenna structure to provide universal coverage across multiple communication systems (2G, 3G, LTE, Wi-Fi, Bluetooth, WiMAX) without compromising communication quality.
Solution Approach 2:
The antenna employs a planar configuration with elements arranged in two dimensions on a substrate. The third radiation element extends in a direction different from the first and second elements, creating a multi-dimensional radiation pattern from a compact planar structure. This dimensional arrangement enables wideband coverage within a small footprint suitable for mobile devices.
Data Source
AI summary
An antenna structure includes a ground plane, a feeding connection element, a first radiation element, a second radiation element, a third radiation element, and a shorting radiation element. The feeding connection element is coupled to a signal source. The first radiation element and the second radiation element are coupled to the feeding connection element. The second radiation element and the first radiation element substantially extend in opposite directions. The third radiation element is coupled to the ground plane. The third radiation element partially surrounds the second radiation element. The shorting radiation element is coupled between the feeding connection element and the third radiation element.