Wireless Power Supply Device With Dual Antennas For Stable Transmission
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Solution Overview
Problem
Existing wireless power supply devices using small-sized antennas experience significant fluctuations in transmission efficiency with varying transmission distances, requiring complex position recognition and power control systems to maintain stable power delivery.
Innovation Solution
A wireless power supply device employing two power transmission antennas and corresponding power receiving antennas, where the antennas are arranged in a configuration that allows for constant power supply and stable transmission efficiency by averaging the power transmission across the distance, eliminating the need for position recognition and power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If small-sized antennas are used for wireless power transmission, then the device size is reduced, but transmission efficiency fluctuates significantly with varying transmission distances
Solution Approach 1:
The single antenna system is segmented into multiple transmission antennas (at least two) arranged in specific geometric configurations. This segmentation allows the system to maintain stable transmission efficiency across varying distances by distributing the transmission function across multiple antenna elements, thereby resolving the contradiction between small size and stable efficiency.
2Reliability
If position recognition and power control systems are added to maintain stable power delivery, then transmission efficiency stability is improved, but device complexity increases
Solution Approach 1:
The multiple antenna system provides self-service by inherently maintaining stable transmission efficiency through its geometric configuration and signal combining capabilities. The system automatically compensates for position variations without requiring external position recognition or complex power control mechanisms, thus achieving reliability without increased complexity.
3Adaptability or versatility
If the power receiving device moves to varying positions, then adaptability is improved, but transmission efficiency fluctuates
Solution Approach 1:
The system merges the transmission signals from multiple antennas at the receiving end, combining the electromagnetic energy constructively. This merging effect ensures that even when the receiving device moves to varying positions, the combined signal maintains stable transmission efficiency, thus achieving both adaptability and energy efficiency.
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 device achieves stable power transmission with minimal efficiency fluctuations, ensuring consistent power delivery even when the power receiving antennas move within the area between the transmission antennas, regardless of their position.
Implementation Method 1
a microwave generator for generating microwaves
Implementation Method 2
Microwaves emitted from a power transmission surface of the power transmission antenna are received by a power receiving surface of a power receiving antenna
Implementation Method 3
After the microwaves received by the power receiving surface are converted into the power by a power conversion circuit part
Data Source
AI summary
A wireless power supply device is capable of supplying constant power without fluctuation in transmission efficiency even when small-sized antennas in which the power fluctuates due to the transmission distance are used. The wireless power supply device includes a first power receiving antenna having a power receiving surface facing a power transmission surface of a first transmission antenna and a second power receiving antenna having a power receiving surface facing a power transmission surface of a second power transmission antenna, both are integrally formed and connected to a power supply target. A direction in which the power receiving surface of the first power receiving antenna faces the power transmission surface of the first power transmission antenna is parallel to a direction in which the power receiving surface of the second power receiving antenna faces the power transmission surface of the second power transmission antenna.