Coupled Loop MIMO Antenna for 5G Sub-6 GHz Mobile Terminals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 5G MIMO antenna systems face challenges in accommodating multiple antennas in limited spaces of handheld devices while covering all 5G Sub-6 GHz frequency bands, requiring a design that balances antenna efficiency, isolation, and compactness.
Innovation Solution
A 5G wideband MIMO antenna system based on coupled loop antennas, comprising multiple antenna units with overlapping coupling branches and a dielectric frame, allowing for efficient frequency coverage from 3.3 to 5 GHz, optimized for mobile terminals with a compact and lightweight design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple MIMO antennas are increased to meet 5G transmission rate requirements, then data rate and reliability are improved, but the space occupied by antennas increases making it difficult to fit in handheld devices
Solution Approach 1:
The patent applies nesting by placing multiple antenna elements within a compact folded structure where antenna components are nested inside each other through the folding mechanism, allowing multiple antennas to occupy reduced spatial volume while maintaining their functional separation
Solution Approach 2:
The patent utilizes three-dimensional space by folding the antenna structure along multiple axes, transforming a planar antenna layout into a compact 3D configuration that fits within the limited volume of handheld devices while accommodating multiple antenna elements
2Length of moving object
If handheld devices are made thinner with narrower frames, then device portability is improved, but the MIMO antenna structure becomes more complex to meet antenna efficiency and isolation requirements
Solution Approach 1:
The folded antenna structure nests multiple antenna elements within a compact configuration, allowing the antenna system to maintain full functionality while reducing the overall device thickness by utilizing internal space rather than external expansion
3Adaptability or versatility
If a MIMO antenna structure is designed to cover all 5G Sub-6 GHz frequency bands, then frequency coverage is improved, but the antenna system becomes more complex
Solution Approach 1:
The patent implements multi-functionality by designing a single folded antenna structure that can operate across multiple 5G frequency bands (including n77, n78, and n79 bands), allowing one antenna system to perform multiple frequency coverage functions rather than requiring separate antennas for each band
Data Source
AI summary
A 5G wideband MIMO antenna system based on coupled loop antennas and a mobile terminal are disclosed. The antenna system comprises at least four antenna units comprising an antenna frame, a first coupling branch, a second coupling branch, a feed branch and an ground branch, wherein one end of the first coupling branch and one end of the ground branch are overlapped in the thickness or length direction of the frame, one end of the second coupling branch and one end of the feed branch are overlapped in the thickness or length direction of the frame. A traditional loop antenna is converted into a coupled loop antenna with three coupling regions. The coupled loop antenna system is high in antenna efficiency, good in isolation, simple in structure and easy to manufacture and has a small height when placed vertically, thereby making the mobile terminal lighter and thinner.