Multi-Antenna Feeding Layout to Reduce Electromagnetic Coupling
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Solution Overview
Problem
Existing multi-antenna systems for wireless power transfer face challenges in securing sufficient power reception and directivity while maintaining low manufacturing costs, and are prone to electromagnetic coupling and increased costs due to complex arrangements and substrate areas.
Innovation Solution
A multi-antenna design featuring first and second antenna elements with linear antennas extending from feeding points, connected by a connection line that avoids bisectors of interior angles, optimized for efficient power reception and reduced electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple linear antennas are used to secure sufficient power reception and directivity, then power reception efficiency is improved, but electromagnetic coupling occurs and device complexity increases
Solution Approach 1:
The patent applies asymmetry by intentionally designing the connection line to connect feeding points non-symmetrically, specifically avoiding extension along the bisector of interior angles. This asymmetric connection arrangement reduces electromagnetic coupling between adjacent antennas while maintaining effective power reception, resolving the contradiction between improving power reception efficiency and reducing device complexity.
2Reliability
If complex multi-antenna arrangements are used to improve reception performance, then power reception efficiency is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies parameter changes by modifying the geometric parameters of the connection line, specifically its routing and orientation relative to the antenna elements. By changing the connection line's path to avoid bisector extensions, the design achieves reduced electromagnetic coupling and improved reception performance without requiring complex multi-antenna arrangements, thereby maintaining low manufacturing cost.
3Ease of operation
If connection line extends along bisector of interior angle, then connection is simplified, but electromagnetic coupling increases and power reception efficiency decreases
Solution Approach 1:
The patent applies asymmetry by intentionally designing the connection line to connect feeding points non-symmetrically, specifically avoiding extension along the bisector of interior angles. This asymmetric connection arrangement reduces electromagnetic coupling between adjacent antennas while maintaining effective power reception, resolving the contradiction between improving power reception efficiency and reducing device 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
The design achieves improved power reception efficiency and reduced manufacturing costs by optimizing antenna arrangement and connection, minimizing electromagnetic coupling and substrate area.
Implementation Method 1
In recent years, wireless power transfer (WPT) has been used in various fields. By utilizing WPT, problems such as wiring load, breakage, and maintenance can be avoided as compared with the case of wired power transfer.
Data Source
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Figure 3A~3B
AI summary
This multi-antenna comprises: a substrate; a first antenna element composed of two linear antennas extending from a first feeding point in two different directions, and a second antenna element composed of two linear antennas extending from a second feeding point in two different directions, the first and second antenna elements being arranged to surround one area of the substrate; and a connecting line connecting the first feeding point of the first antenna element and the second feeding point of the second antenna element. The connecting line is connected to the first feeding point of the first antenna element without extending along the bisector of the interior angle formed by the two linear antennas with the first feeding point of the first antenna element at the apex. The connecting line is connected to the second feeding point of the second antenna element without extending along the bisector of the interior angle formed by the two linear antennas with the second feeding point of the second antenna element at the apex.