Multi-band Dual-polarization Antenna Arrays for 5G
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Solution Overview
Problem
Modern wireless devices, particularly those in 5G mobile communication networks, face challenges with millimeter wave signal propagation due to attenuation and limited form factor constraints, which affect the design of multi-band antennas.
Innovation Solution
A multi-band antenna array comprising two subarrays with antenna elements of different shapes and orientations, allowing for dual polarizations and resonance across multiple frequency bands, enabling efficient signal transmission and reception in constrained spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If millimeter wave signals are used for wireless communication, then communication bandwidth and speed are improved, but signal attenuation increases significantly
Solution Approach 1:
The antenna array divides the communication function into multiple antenna elements (at least two) that work together. Each element contributes to the overall signal transmission, allowing the system to achieve higher communication speeds while mitigating individual signal attenuation through collective operation and signal combining.
Solution Approach 2:
Multiple antenna elements are combined into a unified antenna array system that operates in coordination. The signals from multiple elements are merged and processed together, enabling the system to overcome millimeter wave attenuation while maintaining high communication bandwidth and speed through constructive signal combination.
2Reliability
If antenna size is increased to improve signal transmission, then communication performance is improved, but device form factor constraints are violated
Solution Approach 1:
The antenna system is segmented into multiple smaller antenna elements arranged in an array configuration. This segmentation allows the total antenna area to remain compact for mobile devices while achieving improved signal transmission quality through the collective operation of multiple elements, effectively distributing the transmission function across a compact footprint.
Solution Approach 2:
The antenna elements are arranged in a two-dimensional array pattern rather than using a single large element. This dimensional arrangement allows the system to achieve enhanced transmission performance through spatial distribution of multiple elements while maintaining a compact overall area suitable for mobile device form factors.
3Adaptability or versatility
If multi-band capability is added to antennas, then communication versatility is improved, but antenna structure complexity increases
Solution Approach 1:
The antenna array elements are designed with dual-polarization capability, allowing each element to function across multiple frequency bands and polarization modes. This multi-functionality enables the antenna system to operate in diverse frequency bands (including millimeter wave and sub-6 GHz) without requiring separate dedicated antennas for each band, thereby achieving versatility while controlling structural complexity.
Solution Approach 2:
The antenna elements are designed to support variable operating parameters including multiple frequency bands and dual polarizations. By incorporating elements that can operate across a range of frequencies and polarization states, the system achieves multi-band versatility through parameter flexibility rather than through complex multi-structure configurations.
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 dual polarization antenna array enhances signal propagation and compactness, improving the performance of wireless devices in millimeter wave communication by effectively navigating multiple frequency bands and overcoming form factor limitations.
Implementation Method 1
The first antenna element and the second antenna element resonate at a first resonance frequency band along the first long axis and the second long axis, respectively, and the first antenna element and the second antenna element further resonate at a second resonance frequency band along the first short axis and the second short axis, respectively
Data Source
AI summary
A multi-band antenna array includes first antenna elements and second antenna elements. Each first antenna element has a first shape spanned by a first long axis and a first short axis, the first long axis being longer than and perpendicular to the first short axis. Each second antenna element has a second shape spanned by a second long axis and a second short axis, the second long axis being longer than and perpendicular to the second short axis. The first long axis is non-parallel to the second long axis. The first antenna element and the second antenna element resonate at a high resonance frequency band along the first long axis and the second long axis, respectively, and the first antenna element and the second antenna element further resonate at a low resonance frequency band along the first short axis and the second short axis, respectively.