Phased Microwave Beamforming 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 phases based on beacon signals to optimize power delivery, allowing for high power transmission over long distances by using multiple transmitters and receivers, and adapting power levels according to device movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If conventional wireless power transmission is used to deliver high power over long distances, then the power transmission distance is extended, but the power receiver size must be significantly increased to capture enough focused power
Solution Approach 1:
The patent implements dynamic beam tracking and focusing by continuously adjusting the phase and amplitude of each antenna element based on real-time feedback from the moving receiver. This allows the beam to dynamically follow and concentrate on the receiver regardless of its position or orientation, eliminating the need for a large fixed aperture
Solution Approach 2:
The system changes the transmission parameters (phase, amplitude, frequency) of each antenna element based on the receiver's position and movement. By dynamically adjusting these parameters, the system maintains focused power delivery over long distances without requiring a large receiver aperture
2Length of stationary object
If conventional focused power transmission is used over high distances, then the power can reach distant devices, but the beam grows significantly and power delivery efficiency decreases
Solution Approach 1:
The system employs feedback mechanisms where the receiver continuously transmits beacon signals that provide position and orientation information to the transmitter. The transmitter uses this feedback to adjust its beam forming parameters in real-time, maintaining beam focus and minimizing energy loss from beam spread
Solution Approach 2:
The beam is made dynamic through continuous adjustment of antenna element phases and amplitudes based on receiver position. This dynamic adaptation prevents beam spread by constantly redirecting and refocusing the energy on the moving receiver, reducing energy loss over distance
3Power
If the power receiver aperture is increased to capture enough power at high distances, then the power capture capability is improved, but the device complexity and size increase
Solution Approach 1:
Instead of using a large static aperture, the system uses a small dynamic aperture that actively tracks and focuses on the transmitter through continuous phase and amplitude adjustments. This dynamic approach achieves equivalent or superior power capture with much smaller and simpler receiver hardware
Solution Approach 2:
The system achieves high power capture by changing the transmission parameters of multiple antenna elements rather than increasing the physical aperture size. This parameter-based approach maintains power capture capability while keeping the receiver simple and compact
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 to devices over long distances, ensuring that the power receiver can capture focused energy effectively and maintain efficient power delivery even as devices move, thereby addressing the limitations of conventional systems.
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
Implementation Method 3
a beacon device, or powered device)... to enable enough aperture to capture the focused power at the high distances
Data Source
AI summary
A method is implemented by a wireless power system. The wireless power system includes a wireless power transmitter and a wireless power receiver. The method includes receiving, by the wireless power transmitter of the wireless power system, beacon signals transmitted from the wireless power receiver of the wireless power system. The method includes adding, by the wireless power transmitter, phases for each port of the wireless power receiver based upon the beacon signals. The method includes generating, by the wireless power transmitter, a high power signal based on adding of the phases. The method includes transmitting, by the wireless power transmitter, the high power signal to the wireless power receiver.