Phased Microwave Array Synchronization for Long-Range Wireless Power
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Solution Overview
Problem
Conventional wireless power transmission systems face challenges in efficiently delivering high power over long distances due to the size requirements of the power receiver and the growth of the focused power beam, which can lead to inefficiencies and limitations in powering multiple moving devices.
Innovation Solution
A wireless power system that uses a phased microwave array transmitter to focus microwave energy onto a power receiver, adjusting the phase of each antenna to optimize power delivery and adapt to changes in the distance and location of the receiver, allowing for high power transmission to multiple devices through multiple transmitters and receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional wireless power transmission is used to deliver high power over long distances, then the power receiver size must be increased to capture enough focused power, but this increases device size and complexity
Solution Approach 1:
The patent implements dynamic beam tracking and focusing by continuously adjusting the phase and amplitude of each antenna element in the array based on real-time receiver position and orientation data. This dynamic adaptation allows the system to maintain optimal power concentration on the receiver without requiring the receiver to have a large aperture, resolving the contradiction between power transmission capability and receiver size
Solution Approach 2:
The system changes the parameters of the transmitted electromagnetic waves by adjusting the phase and amplitude distribution across the antenna array elements. By optimizing these parameters in real-time based on receiver feedback, the system achieves high power concentration at the receiver location without requiring the receiver to be physically large, thus resolving the contradiction
2Length of stationary object
If focused power is transmitted over high distances, then the beam grows significantly, but this leads to power loss and reduced transmission efficiency
Solution Approach 1:
The patent employs feedback mechanisms where the receiver continuously transmits beacon signals that allow the transmitter to determine the receiver's position, orientation, and received power level. This feedback enables the transmitter to adjust its beam parameters to compensate for distance-related beam spreading and maintain optimal power transmission efficiency, resolving the contradiction between transmission distance and energy loss
Solution Approach 2:
The system dynamically adjusts the beam characteristics including width, direction, and intensity based on real-time conditions and distance to the receiver. This dynamic beam control prevents excessive beam spreading and maintains power concentration over long distances, resolving the contradiction between transmission distance and power loss
3Power
If the power transmitter uses a large antenna array to focus power at high distances, then the system complexity increases, but this is necessary to maintain beam focus
Solution Approach 1:
The patent divides the transmitter into multiple independent antenna elements arranged in an array, where each element can be independently controlled in terms of phase and amplitude. This segmentation allows the system to achieve beam focusing and steering capabilities while maintaining manageable complexity through modular architecture and digital signal processing techniques
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
Enables efficient high power transmission over long distances by optimizing the phase alignment of the microwave array to ensure maximum power delivery to the receiver, addressing the issues of receiver size and beam growth, and allowing for flexible power distribution to multiple moving devices.
Implementation Method 1
a method and system for wireless power transmission by microwave transmission
Implementation Method 2
the power transmitter can determine a complex conjugate of an interference pattern phase set on the array to emits one or more signals that travel back to the power receiver. The one or more signals can be considered a 'focused' power
Data Source
AI summary
A method is implemented by a wireless power system. The wireless power system includes wireless power transmitters and wireless power receivers. The method includes receiving, by the wireless power transmitters, beacon signals transmitted from wireless power receivers. The method includes synchronizing, by the wireless power transmitters, a transmission of high power signals. The method includes transmitting, by the wireless power transmitters, the high power signals as synchronized to the wireless power receivers. Each transmitter of the plurality of wireless power transmitters individually transmits a corresponding signal of the plurality of high power signals.