Large-Area Wireless Power Antenna for Uniform Moving-Device Charging
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in achieving uniform power transmission over large areas, particularly when devices are in motion, and the inclusion of more conductive materials to enhance uniformity leads to cost, environmental, and sustainability concerns.
Innovation Solution
The system employs molecule-based transmission antennas with internal repeaters, alternating current directions, and inter-turn capacitors to maintain field uniformity, reduce complexity, and minimize the use of conductive materials, while using a metallic mesh structure for shielding and a demodulation circuit for efficient data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If more conductive materials are used to enhance field uniformity, then power transmission uniformity is improved, but manufacturing cost and environmental impact worsen
Solution Approach 1:
The transmission antenna is divided into multiple antenna molecules arranged in a grid pattern. Each molecule consists of conductive traces forming resonant structures, distributed across the charging surface. This segmentation allows the system to achieve uniform field distribution through spatial arrangement rather than increasing overall material quantity.
Solution Approach 2:
Different regions of the antenna are designed with varying trace densities and molecular configurations to optimize local field characteristics. The molecular structure includes conductive traces of different orientations (x-direction and y-direction traces) that create localized field patterns contributing to overall uniformity without requiring uniform material distribution throughout.
2Manufacturing precision
If more conductive materials are used to enhance field uniformity, then manufacturing complexity increases
Solution Approach 1:
The antenna molecules serve multiple functions: they generate electromagnetic fields for power transmission, provide structural organization for the antenna array, and enable scalable manufacturing through repetitive modular units. The conductive traces form both the resonant elements and the connecting structures, reducing the need for separate components.
Solution Approach 2:
The patent combines multiple antenna elements into integrated molecular structures where conductive traces form complete resonant circuits within each molecule. This merging of functions into unified molecular units simplifies manufacturing compared to assembling separate components, while maintaining field uniformity through the coordinated arrangement of molecules.
3Area of stationary object
If transmission antenna is designed for large charge area, then charging coverage is improved, but field uniformity deteriorates
Solution Approach 1:
The large charge area is divided into multiple smaller antenna molecules arranged in a grid pattern. Each molecule independently generates electromagnetic fields, and their collective arrangement across the large area maintains field uniformity through distributed source configuration rather than using a single large antenna element.
Solution Approach 2:
The antenna structure transitions from two-dimensional trace patterns to three-dimensional molecular arrangements with vertical spacing between transmitter and receiver surfaces. This dimensional approach allows large horizontal coverage while maintaining consistent field strength through controlled vertical geometry and molecular orientation.
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
This configuration achieves uniform power transmission over large areas with reduced manufacturing complexity, cost, and environmental impact, while maintaining metal resiliency and efficient data communication.
Implementation Method 1
The transmission antenna is configured to transmit one or both of wireless power signals and wireless data signals within a large charge area
Implementation Method 2
The wireless receiver system is configured to receive one or both of the wireless power signals and the wireless data signals
Data Source
AI summary
A system for wireless power transfer includes a wireless transmission system and a wireless receiver system. The wireless transmission system includes a transmission antenna configured to transmit one or both of wireless power signals and wireless data signals within a large charge area, the large charge area having a length of in a range of 50 millimeters (mm) to 300 mm and a width in a range of 150 to 500 mm. The wireless receiver system includes a receiver antenna, the receiver antenna including a plurality of receiver coils, each of the plurality of receiver coils configured to receive one or both of the wireless power signals and the wireless data signals within the large charge area.