Multi-Antenna Layout With Asymmetric Feed Line for Wireless Power
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Solution Overview
Problem
Existing multi-antenna systems for wireless power transfer face challenges in securing sufficient power reception and directivity, are prone to electromagnetic coupling, and have high manufacturing costs due to complex arrangements and substrate areas.
Innovation Solution
A multi-antenna design featuring two linear antenna elements with unique connection lines that avoid bisectors of interior angles and utilize an interface substrate for efficient arrangement and connection, optimizing power reception and reducing manufacturing costs.
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 multi-antenna system is divided into multiple antenna elements (first antenna element with two linear antennas, second antenna element with two linear antennas) that are independently arranged and connected. Each antenna element can be optimized separately while contributing to the overall power reception efficiency, reducing the complexity of designing the entire system as a single unit.
Solution Approach 2:
The connection line is deliberately designed to avoid extending along the bisector of the interior angle formed by the linear antennas. This asymmetric connection arrangement prevents electromagnetic coupling between adjacent antennas while maintaining effective power reception, resolving the contradiction between improving reliability and reducing device complexity.
2Reliability
If complex multi-antenna arrangements are used to improve power reception, then directivity is enhanced, but manufacturing cost increases
Solution Approach 1:
Multiple linear antennas are merged into antenna elements that share common connection points and feeding structures. The first antenna element combines two linear antennas extending in different directions from a first feeding point, and the second antenna element combines two linear antennas from a second feeding point. This merging reduces the number of independent components and simplifies manufacturing while maintaining directivity.
Solution Approach 2:
The connection line serves multiple functions: it connects antenna elements, provides feeding paths, and acts as a structural support. By making the connection line multi-functional, the design reduces the need for additional separate components, thereby lowering manufacturing costs while maintaining the required directivity performance.
3Reliability
If antennas are arranged to surround one region of the substrate, then power reception efficiency is improved, but substrate area increases
Solution Approach 1:
The antenna elements are arranged in a two-dimensional pattern that surrounds a central region, utilizing both horizontal and vertical spacing to create an effective radiation pattern. This dimensional arrangement allows the antennas to achieve good power reception efficiency by capturing signals from multiple directions without requiring excessive substrate area, as the surrounding arrangement maximizes spatial utilization.
Solution Approach 2:
The antenna elements are positioned to surround a central region in a nested configuration, where the first and second antenna elements are arranged concentrically or in overlapping patterns. This nesting allows the antennas to be compactly arranged around a shared central feeding region, improving power reception efficiency while minimizing the overall substrate area required.
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 ensures improved power reception efficiency and directivity while minimizing electromagnetic interference and manufacturing expenses, suitable for various environments including building management areas.
Implementation Method 1
wireless power transfer (WPT) has been used in various fields. By utilizing WPT, problems such as wiring load, breakage, and maintenance can be avoided
Data Source
AI summary
A multi-antenna includes a substrate, a first antenna element including two linear antennas extending in two different directions from a first feeding point, and a second antenna element including two linear antennas extending in two different directions from a second feeding point, the first antenna element and the second antenna element being arranged to surround one region of the substrate, and a connection line configured to connect, through the one region, the first feeding point of the first antenna element and the second feeding point of the second antenna element. The connection line is connected to the first feeding point of the first antenna element so as not to extend along a bisector of an interior angle formed by the two linear antennas with the first feeding point of the first antenna element as an apex.