Multi-band Antenna with Nested Radiation Portions for 5G Bandwidth
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Solution Overview
Problem
Current multi-band antennas for mobile communication devices face challenges in increasing frequency bandwidth within limited space, particularly due to the overlap of 5G and 4G frequency bands, which existing small planar inverted-F antennas cannot adequately satisfy.
Innovation Solution
A multi-band antenna design incorporating a grounding portion, feed-in portion, feeding point, and multiple radiation portions (first, second, third, and fourth) with specific geometric configurations and extending lengths, allowing for frequency bandwidths between 698 MHz and 5000 MHz, optimized for miniaturization in electronic products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a small planar inverted-F antenna is used to fit within mobile device housings, then the antenna size is reduced to meet miniaturization requirements, but the frequency bandwidth cannot be increased sufficiently to satisfy multiple frequency bandwidths requirement
Solution Approach 1:
The antenna is divided into multiple radiation portions (first, second, third, and fourth radiation portions) with different extending lengths and configurations. Each radiation portion contributes to different frequency bands, allowing the compact antenna structure to achieve multi-band operation by segmenting the radiating elements rather than using a single large antenna.
Solution Approach 2:
The antenna structure utilizes three-dimensional spatial arrangement with radiation portions extending in different directions and layers. The first radiation portion extends from the grounding portion, the second from the feed-in portion, and the third and fourth portions are arranged in specific spatial relationships, effectively using vertical and horizontal dimensions to pack multiple resonant structures into a small footprint while maintaining distinct frequency responses.
2Area of stationary object
If the antenna area is kept constant to meet housing space constraints, then the device maintains compact form factor, but it becomes difficult to increase application bandwidth under certain antenna area condition
Solution Approach 1:
The fourth radiation portion is positioned among the third radiation portion, feed-in portion, and first radiation portion, creating a nested arrangement where smaller radiating elements are positioned within the spatial envelope defined by larger ones. This nesting allows multiple resonant structures to coexist in a compact area, enabling bandwidth expansion without increasing the overall antenna footprint.
Solution Approach 2:
The antenna design transitions from two-dimensional planar expansion to three-dimensional spatial utilization. By arranging radiation portions at different heights and angles (with the first radiation portion extending upward from grounding, and others extending in various directions from the feed-in portion), the design packs more radiating surface area into the same planar footprint, effectively increasing bandwidth capacity without expanding the antenna's projected area.
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 effectively increases frequency bandwidths within a finite volume, supporting multiple frequency ranges, ensuring compatibility with both 5G and 4G networks while adhering to miniaturization trends in electronic devices.
Implementation Method 1
a first radiation portion extended from the grounding portion. The second radiation portion is extended from the second end edge of the feed-in portion... An extending length of the first radiation portion is longer than an extending length of the second radiation portion
Data Source
AI summary
A multi-band antenna includes a grounding portion, a feed-in portion, a feeding point, a first radiation portion, a second radiation portion, a third radiation portion and a fourth radiation portion. The feed-in portion has a first end edge, a second end edge, a first side edge and a second side edge. The feeding point is disposed at the feed-in portion. The first radiation portion is extended from the grounding portion. The second radiation portion is extended from the second end edge. The third radiation portion is extended from the first end edge. The fourth radiation portion is extended from an upper portion of the first end edge and an upper portion of the second end edge.