Multi-Lobe Beamforming for Wireless Power Efficiency
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Solution Overview
Problem
Conventional wireless power transmission systems using beamforming technology struggle to maximize efficiency when powering multiple receiver devices, as they typically form beams in the direction of the closest device, reducing power transmission to other devices and unable to create multi-lobe beam patterns.
Innovation Solution
A transmitter apparatus with a receiver position identifier, signal transmitter, and beamforming unit that iteratively sets frequency and beamforming vectors to form a multi-lobe beam pattern, adjusting phases and gains to optimize power transmission to multiple receivers, enhancing efficiency by calculating downlink channels and energy conversion efficiencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional beamforming technique forms beam in direction of closest receiver apparatus, then wireless power transmission efficiency to that receiver is improved, but power transmission to other receiver apparatuses is greatly reduced
Solution Approach 1:
The patent segments the single beam into multiple beams (multi-lobe beam pattern), with each lobe directed toward a different receiver apparatus. This allows the transmitter to serve multiple receivers simultaneously by dividing the transmitted power into distinct spatial segments, resolving the contradiction between optimizing for one receiver and serving multiple receivers.
Solution Approach 2:
The patent extends the conventional single-lobe beamforming into the angular dimension by creating a multi-lobe beam pattern with lobes distributed across different directions. This dimensional expansion in the spatial angular domain enables simultaneous power transmission to multiple receivers located at different angles, transforming the single-direction optimization into multi-directional coverage.
2Device complexity
If beamforming adjusts only phase and gain, then beam formation is simple, but multi-lobe beam pattern cannot be formed
Solution Approach 1:
The patent introduces frequency as an additional controllable parameter to the traditional phase and gain adjustments. By manipulating the frequency of signals fed to different antenna elements, the system can dynamically shape and reconfigure multi-lobe beam patterns without adding physical hardware complexity, enabling adaptive beamforming to multiple receivers.
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
This approach significantly improves wireless power transmission efficiency by evenly distributing power to multiple receivers, increasing the total harvested energy and power transmission efficiency compared to conventional methods.
Implementation Method 1
a signal transmitter unit comprising a multiple number of antennas arrayed in a pre-designated pattern and configured to radiate wireless power signals by forming a beam in a pattern corresponding to signals supplied respectively to the multiple antennas
Data Source
AI summary
A wireless power transmission system includes a receiver position identifier unit configured to determine the positions of receiver apparatuses; a signal transmitter unit comprising antennas arrayed in a pre-designated pattern and configured to radiate wireless power signals by forming a beam in a pattern corresponding to signals supplied respectively to the antennas; and a beamforming unit configured to improve a wireless power transmission efficiency by temporarily setting a frequency vector, which is for designating frequencies of the signals supplied to the antennas, and a beamforming vector, which is for designating phases and gains of the signals, based on the positions of the receiver apparatuses and alternatingly iteratively estimating the other vector to enhance power transmission efficiency such that a multi-lobe beam pattern radiated simultaneously in the directions of the receiver apparatuses is formed in the antennas.