Loop-Connected Multi-Antenna Layout to Suppress Electromagnetic Coupling
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Solution Overview
Problem
Existing multi-antenna configurations for wireless power transfer face challenges in optimizing the number, arrangement, and connection of antennas to enhance power receiving efficiency while minimizing electromagnetic coupling and maintaining aesthetic appeal, especially in environments where space efficiency and manufacturing costs are concerns.
Innovation Solution
A multi-antenna configuration featuring 14 linear antennas arranged in a cross shape on a substrate, with connecting lines forming a loop shape to connect all antennas, optimizing their arrangement to reduce electromagnetic coupling and enhance space efficiency, and using interface substrates for arrangement and connection assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single linear antenna is used for wireless power transfer, then the device complexity is reduced, but the power receiving efficiency and directivity are insufficient
Solution Approach 1:
The patent combines multiple linear antennas (11-24) into a multi-antenna system where all antennas are integrated on a single substrate and connected through a unified connecting line structure. This merging approach increases power receiving efficiency while maintaining compact form factor, resolving the contradiction between simple configuration and high efficiency.
Solution Approach 2:
The multi-antenna system serves multiple functions simultaneously: it provides power receiving capability through multiple antennas, achieves directional reception through specific arrangement patterns, and maintains aesthetic appearance through compact integration. This multi-functionality resolves the contradiction by delivering enhanced performance without proportionally increasing complexity.
2Reliability
If multiple linear antennas are used to increase power receiving efficiency, then electromagnetic coupling occurs between antennas, but power receiving efficiency can be improved
Solution Approach 1:
The patent applies local quality by creating distinct spatial zones around each antenna element. The connecting lines are routed to pass through regions between antennas rather than directly connecting adjacent antennas, effectively creating electromagnetic isolation zones that reduce coupling while maintaining electrical connectivity for power reception.
Solution Approach 2:
The connecting lines serve as intermediary elements that mediate between the multiple antenna elements. Rather than allowing direct electromagnetic interaction between antennas, the connecting lines provide a controlled path for electrical connection while the physical arrangement and routing act as intermediaries to minimize harmful electromagnetic coupling.
3Area of stationary object
If more antennas are arranged closely to increase space efficiency, then manufacturing cost is reduced, but electromagnetic coupling increases
Solution Approach 1:
The patent employs a nested arrangement where antennas are organized in concentric patterns around a central point. The connecting lines are nested within the antenna structures, passing through the regions between antenna elements. This nesting allows dense packing of antennas in limited space while the hierarchical organization maintains electromagnetic isolation.
Solution Approach 2:
The patent transitions from linear or planar antenna arrangements to a three-dimensional spatial configuration where antennas are positioned at different radial distances and angular positions from a central point. This dimensional change allows efficient space utilization while maintaining adequate electromagnetic separation through strategic positioning in multiple spatial dimensions.
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 configuration significantly increases power receiving efficiency, suppresses electromagnetic coupling, and maintains a compact, aesthetically pleasing design, achieving radiation efficiencies exceeding those of conventional multi-antennas, while reducing manufacturing costs.
Implementation Method 1
a wireless power transfer (WPT: wireless power transfer) has been used in various fields
Data Source
AI summary
A multi-antenna which is capable of increasing the space efficiency and of avoiding or suppressing the problems of electromagnetic coupling is provided. The multi-antenna include; a substrate; a total of two linear antennas provided in a substantially cross shape to define four regions on the substrate; a total of eight linear antennas that form a substantially cross shape in each of the four regions; a total of four linear antennas provided along four sides of a substantially square shape at outermost positions on the substrate to surround the four regions; and a connecting line provided to connect all of the fourteen linear antennas in a substantially loop shape in a clockwise or anti-clockwise direction.