Near-Field Reflectarray Panel Phase Synthesis for 5G Coverage
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Solution Overview
Problem
Current 5G wireless communication systems face challenges in providing consistent power and coverage due to high atmospheric attenuation and geographical obstructions, especially in dense-scattering areas and remote locations with extreme climatic conditions, which hinder the effective deployment of large array antennas.
Innovation Solution
The use of reflectarray antennas, which are arrays of cells with conductive printed elements that reflect incident RF signals into focused, directional beams, optimized for specific frequency-dependent phase distribution and geometrical configurations to enhance wireless communication coverage in various environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If large array antennas are deployed to improve wireless coverage, then coverage area and signal strength are improved, but device complexity and cost increase
Solution Approach 1:
The patent divides the large array antenna into multiple smaller reflectarray panels, each with manageable complexity. These panels can be independently designed, manufactured, and deployed, then coordinated to provide comprehensive coverage. This segmentation reduces the complexity of individual units while maintaining overall coverage area.
Solution Approach 2:
The patent transitions from traditional planar array antennas to three-dimensional deployable structures that can be inflated or expanded. This dimensional change allows the antenna to achieve large coverage areas without requiring permanently complex large-scale structures, as the complexity is only present during the deployed state.
2Area of stationary object
If traditional array antennas are used to provide wide coverage, then coverage area is improved, but ease of manufacture deteriorates
Solution Approach 1:
By segmenting the antenna system into standardized reflectarray panels, each panel can be manufactured using consistent processes and then assembled into larger configurations. This modular approach significantly improves ease of manufacture compared to building custom large arrays from scratch.
Solution Approach 2:
The patent employs inflatable or deployable structures that can be manufactured as compact units and then expanded to their operational size. This approach simplifies manufacturing and transportation, as the antenna structure can be collapsed to a small form factor for production and shipping, then inflated to provide wide coverage area.
3Measurement precision
If manual calibration is performed to optimize antenna performance, then beam precision is improved, but time consumption and operational complexity increase
Solution Approach 1:
The reflectarray panels incorporate self-calibration capabilities through integrated phase shifters and control systems that automatically adjust their operation based on received signal feedback. This self-service approach eliminates or minimizes the need for manual calibration, maintaining beam precision while dramatically reducing calibration time and operational complexity.
Solution Approach 2:
The patent implements feedback mechanisms where the antenna system continuously monitors its own performance and automatically adjusts phase and amplitude parameters to optimize beam formation. This closed-loop control system maintains high precision without requiring external calibration intervention, thereby reducing time loss and operational complexity.
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
Reflectarray antennas significantly improve 5G wireless coverage by providing a low-cost, easy-to-manufacture, and self-calibrated solution that can enhance data rates up to 10 times current levels, offering robust performance in both indoor and outdoor settings with minimal manual adjustment, while maintaining high bandwidth and gain.
Implementation Method 1
arrays of reflectarray cells configured to produce a phase distribution on a surface of the arrays of reflectarray cells
Data Source
AI summary
Examples disclosed herein relate to a reflectarray panel for near-field wireless communication coverage area and designing the reflectarray panel. The method includes one or more following steps, including, determining a near field coverage area of the reflectarray panel, calculating a tangential reflected field on a reflectarray surface of the reflectarray panel based at least on a feed location and initial geometric parameters of the reflectarray surface, determining radiation pattern specifications with an incident beam pointed toward a center of the near field coverage area, performing a near-field pattern synthesis algorithm on an initial phase distribution of the reflectarray panel, determining a synthesized phase distribution on the reflectarray surface from a result of performing the near-field pattern synthesis algorithm, adjusting one or more geometric parameters of each reflectarray cell of the reflectarray panel to produce the synthesized phase distribution, and/or determining dimensions of the reflectarray panel for manufacturing.