Multi-Band Antenna Structure Using Segmented Radiation Portions
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Solution Overview
Problem
Current antenna structures are not optimized to support multiple frequency bands efficiently, particularly with the advent of 5G, which requires faster transmission speeds and cost-effective solutions for multi-band support.
Innovation Solution
The antenna structure includes a U-shaped first radiation portion, a ground portion, a connection portion, and a second L-shaped radiation portion, all made of metallic sheets, which are electrically connected to a circuit board for efficient current flow and radiation signal generation across multiple frequency bands, including 2.4-2.5 GHz, 5.15-5.85 GHz, 6.1-6.8 GHz, and 7.1-7.25 GHz, using laser direct structuring for manufacturing and adhesive attachment to a plastic housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a same antenna is used to support more frequency bands, then cost is reduced, but transmission speed and performance may be compromised
Solution Approach 1:
The antenna is divided into multiple radiation portions (first radiation portion for lower bands, second radiation portion for higher bands) with different geometries. The first radiation portion includes a first radiating element optimized for 2.4-2.5 GHz and 5.15-5.85 GHz bands, while the second radiation portion includes a second radiating element optimized for 6.1-6.8 GHz and 7.1-7.25 GHz bands. This segmentation allows each portion to be optimized for specific frequency ranges while maintaining multi-band capability overall.
Solution Approach 2:
Different regions of the antenna structure have different geometric properties tailored to specific frequency requirements. The first radiation portion has a geometry optimized for lower frequency bands, while the second radiation portion has a different geometry optimized for higher frequency bands. This local differentiation of geometric quality enables the antenna to maintain high transmission speed across multiple bands using a single structure.
2Adaptability or versatility
If traditional antenna structures are used, then manufacturing is simpler, but they cannot efficiently support multiple frequency bands
Solution Approach 1:
Multiple radiating elements (first radiating element and second radiating element) are merged into a single integrated antenna structure that shares a common ground portion and connection portion. This merging allows the antenna to support multiple frequency bands (2.4-2.5 GHz, 5.15-5.85 GHz, 6.1-6.8 GHz, and 7.1-7.25 GHz) simultaneously while maintaining a unified structure rather than requiring separate antennas for each band.
Solution Approach 2:
The antenna structure is designed as a universal multi-functional device where a single antenna supports four different frequency bands used in 5G and WiFi applications. The first radiation portion handles lower bands (2.4-2.5 GHz and 5.15-5.85 GHz) while the second radiation portion handles higher bands (6.1-6.8 GHz and 7.1-7.25 GHz), making the antenna universally applicable across multiple communication standards and frequency ranges.
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 design achieves low return loss and high radiation efficiency (90%-95%) across multiple frequency bands, enabling omnidirectional and symmetrical radiation patterns, thus supporting multiple frequency bands efficiently and cost-effectively.
Implementation Method 1
electrically connected to a circuit board for efficient current flow and radiation signal generation across multiple frequency bands
Data Source
AI summary
An antenna structure with wide radiation bandwidth includes a first radiation portion, a ground portion, a connection portion, a second radiation portion, and a feed portion. The ground portion is positioned at a plane perpendicular to plane of the first radiation portion. The ground portion is grounded. The connection portion connects to one side of the first radiation portion. The second radiation portion connects to one side of the connection portion away from the first radiation portion. The feed portion is electrically connected to the connection portion and the second radiation portion for feeding current and signals to the antenna structure.