Area-Apportioned Wireless Power Antenna for Multi-Device Charging
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Solution Overview
Problem
Existing wireless power transfer systems are expensive and prone to interference when multiple devices are charged simultaneously, limiting the charging area and efficiency, and require additional transmitters for increased power, with limited form factor customization.
Innovation Solution
A wireless transmission antenna with multiple antenna portions and intelligent crossover design allows for customizable power transmission to multiple receivers, preventing dead spots and enhancing spatial freedom, using a continuous conductive wire with varying turn widths and insulators to prevent electrical connection at crossovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple separate transmitter coils and driver circuits are used to charge multiple devices simultaneously, then the charging capability for multiple devices is improved, but the system cost and complexity increase greatly
Solution Approach 1:
The patent combines multiple transmitter coils into a single integrated antenna structure with multiple antenna portions sharing common driver circuits. This merging approach maintains the ability to charge multiple devices simultaneously while significantly reducing system complexity and cost compared to using separate transmitter coils for each device.
Solution Approach 2:
The single antenna structure is designed to serve multiple functions by incorporating multiple antenna portions that can independently couple with different receiver devices. The common driver circuits can be dynamically allocated to different antenna portions, enabling the system to adaptively charge multiple devices with varying power requirements.
2Productivity
If multiple transmitter coils are used to charge multiple devices simultaneously, then the charging capability is improved, but interference between transmitters increases
Solution Approach 1:
The antenna is segmented into multiple independent antenna portions, each capable of operating at different frequencies or power levels. This segmentation allows for reduced interference between simultaneous charging operations by enabling frequency division or power level differentiation among antenna portions.
3Area of stationary object
If the charging area is increased by adding more transmitters, then the powering area is expanded, but the system cost and complexity increase
Solution Approach 1:
The patent achieves expanded powering area by integrating multiple antenna portions into a single antenna structure, eliminating the need for additional separate transmitters. This merging approach maintains cost-effectiveness while providing a larger overall charging surface area.
Solution Approach 2:
The antenna portions are arranged in different spatial dimensions and orientations, creating a multi-dimensional charging area. This dimensional arrangement allows the system to provide wide power transmission coverage without requiring proportional increases in system complexity.
4Device complexity
If a single transmitter is used, then the system complexity is reduced, but the charging area and capability are limited
Solution Approach 1:
The single antenna structure incorporates multiple antenna portions that can independently function to charge different devices. The common driver circuits can be dynamically allocated to different antenna portions, enabling the single transmitter to provide multi-device charging capability comparable to multiple separate transmitters.
5Ease of manufacture
If uniform turn spacing is used in the antenna, then the manufacturing is simplified, but dead spots and inconsistent coupling occur at outer edges
Solution Approach 1:
The antenna employs non-uniform turn spacing where the spacing between adjacent turns varies across different regions of the antenna portions. This local variation in turn spacing is specifically designed to maintain consistent magnetic field distribution and coupling quality across the entire antenna surface, including outer edges, thereby eliminating dead spots while remaining manufacturable.
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 solution enables efficient, customizable, and interference-free simultaneous charging of multiple devices with a single transmitter, providing a wider charging area and uniform power distribution without the need for additional transmitters.
Implementation Method 1
inductive and/or resonant inductive wireless power transfer, which occurs when magnetic fields created by a transmitting element induce an electric field and, hence, an electric current, in a receiving element
Implementation Method 2
resonant inductive wireless power transfer
Data Source
AI summary
An antenna for wireless power transfer includes a first antenna portion and a second antenna portion. The first antenna portion includes a first antenna terminal, a second antenna terminal, at least one first inner turn, at least one first outer turn, and a first wire crossover electrically connecting the at least one first inner turn with the at least one second outer turn. The antenna further includes a second antenna portion including a third antenna terminal, a fourth antenna terminal, at least one second inner turn, at least one second outer turn, and a second wire crossover electrically connecting the at least one second inner turn with the at least one second outer turn. The second antenna terminal is in electrical connection with the third antenna terminal and the first antenna terminal and fourth antenna terminal are configured for electrical connection with a transmitter circuit.