Antenna Module with Isolation Sheets for Multi-Band Miniaturization
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Solution Overview
Problem
Designing a broadband and multi-band antenna module for miniature communication devices poses challenges in optimizing performance while maintaining a stable radiation pattern and reducing size, as existing solutions either compromise on performance or increase device volume.
Innovation Solution
The antenna module incorporates multiple antennas with serpentine radiation portions and isolation metal sheets to minimize volume and prevent signal interference, allowing for omnidirectional and stable signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are arranged in a communication apparatus with limited volume, then broadband and multi-band capabilities are achieved, but the device design becomes difficult and volume is not reduced
Solution Approach 1:
The patent merges multiple antenna elements (first antenna with first and second radiation portions, second antenna with third and fourth radiation portions) into a single integrated antenna module structure. This combining approach achieves broadband and multi-band capabilities through the coordinated operation of multiple radiation portions while maintaining a compact, unified design that reduces overall device volume and simplifies integration into communication apparatuses.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by extending radiation portions in different directions (first radiation portion in first direction, second radiation portion in second direction perpendicular to first direction). This dimensional approach enables multiple antennas to coexist in a compact volume without interfering with each other, achieving broadband and multi-band functionality while maintaining a small form factor.
2Volume of moving object
If antenna module size is reduced to meet light and thin requirements, then device volume is reduced, but antenna performance optimization becomes difficult
Solution Approach 1:
The patent segments the antenna module into distinct functional components: first antenna with first and second radiation portions, second antenna with third and fourth radiation portions, grounding portions, and isolation metal sheets. This segmentation allows each component to be optimized for its specific function while maintaining overall compactness, ensuring both small volume and reliable antenna performance through targeted design of individual elements.
Solution Approach 2:
The patent employs vertical stacking and three-dimensional arrangement of antenna elements and isolation structures. By utilizing the third dimension (height/depth) rather than only horizontal expansion, the design achieves multiple antenna functions within a reduced footprint while maintaining performance through proper spatial separation and grounding configurations.
3Volume of moving object
If antenna module volume is limited to maintain performance in miniature devices, then device size is reduced, but operation band becomes limited or radiation pattern stability deteriorates
Solution Approach 1:
The patent combines multiple radiation portions (first, second, third, and fourth) that operate at different frequency bands within a single integrated module. The first and third radiation portions handle one operation band while the second and fourth radiation portions handle another operation band, achieving broadband and multi-band capabilities in a compact volume through the synergistic operation of combined elements.
Solution Approach 2:
The patent uses vertical and three-dimensional arrangement of multiple radiation portions extending in different directions to achieve broadband and multi-band operation in a compact volume. By utilizing spatial dimensionality, the design accommodates multiple resonant frequencies and radiation patterns without requiring proportional increases in physical size.
4Volume of moving object
If multiple antennas are placed close together to reduce size, then device volume is reduced, but signal interference between antennas increases
Solution Approach 1:
The patent introduces isolation metal sheets as intermediary structures positioned between the first and second antennas. These isolation metal sheets act as electromagnetic shields that block and redirect signals, preventing direct interference between adjacent antenna elements while maintaining compact spacing. This intermediary approach enables close placement of multiple antennas without suffering from mutual coupling and signal interference.
Solution Approach 2:
The patent extracts and separates the grounding functions into dedicated grounding portions that are electrically connected to both antenna elements. By providing independent grounding paths and using isolation metal sheets to separate antenna elements, the design removes the harmful electromagnetic coupling between antennas while maintaining their close proximity for compact device integration.
Data Source
AI summary
An antenna module mainly includes at least one antenna capable of radiating signals of two frequencies, a grounding portion, and at least one isolation metal sheet capable of isolating signals of a frequency generated by different antennas from each other to avoid interference. The antenna module is integrally formed, which can reduce the volume of the antenna module, and provide a stable radiation pattern and broadband and multi-band functions.