Meta-Surface Wireless Power Beamforming for Adaptive Radiation Patterns
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Solution Overview
Problem
Conventional wireless power-supply devices face challenges in achieving various radiation patterns, efficiency in power reception, compliance with regulatory limits, and optimal beamforming for power transmission to moving devices.
Innovation Solution
A wireless power-supply device utilizing a meta-surface with waveguide patches and switches to control electromagnetic wave radiation patterns, allowing for flexible beamforming and efficient power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional omnidirectional or directional antennas are used for wireless power supply, then the device can transmit signals in various directions or focus in one direction, but it cannot realize various radiation patterns flexibly to adapt to devices with changing positions
Solution Approach 1:
The antenna is divided into multiple independently controllable antenna elements arranged in an array. Each element can be controlled individually through switches, allowing the radiation pattern to be segmented and reconfigured. This segmentation enables flexible beamforming and multiple radiation patterns without requiring a completely different antenna structure for each pattern.
Solution Approach 2:
The antenna system transitions from a static radiation pattern to a dynamic one by incorporating switches that can change the connection state of antenna elements in real-time. This dynamic reconfiguration allows the system to adapt radiation patterns according to the positions of receiving devices, achieving versatility without permanent structural changes.
2Adaptability or versatility
If the connection state of antenna elements is changed to achieve various radiation patterns, then adaptability to moving devices is improved, but the control system complexity increases
Solution Approach 1:
The system incorporates a control device that automatically manages the switch states based on the positions of receiving devices. The control device receives position information and autonomously determines the optimal radiation pattern, reducing the need for manual intervention and simplifying the overall control complexity while maintaining high adaptability.
Solution Approach 2:
The system uses feedback from position information of receiving devices to adjust the radiation pattern dynamically. The control device continuously monitors device positions and adjusts switch states accordingly, creating a closed-loop control system that adapts to changing conditions without requiring complex manual control.
3Adaptability or versatility
If multiple switches are used to control antenna element connections for achieving various radiation patterns, then radiation pattern control is improved, but power loss in switches increases
Solution Approach 1:
The system optimizes switch parameters and selection to minimize power loss. By carefully choosing switch types and configuring their operation, the system achieves the necessary radiation pattern control while keeping power losses minimal. The control device also optimizes which switches are activated based on the required radiation pattern, reducing the total number of active switches and associated power losses.
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 versatile radiation patterns, improved power reception efficiency, and compliance with regulatory limits, ensuring reliable power transmission to devices with changing positions.
Implementation Method 1
an antenna for emitting electromagnetic waves for transmitting power
Implementation Method 2
a meta-surface including a plurality of waveguide patches
Data Source
AI summary
A wireless power-supply device is configured to realize a variety of radiation patterns. The wireless power-supply device includes; a meta-surface including a plurality of waveguide patches and a plurality of switches arranged in association with the plurality of waveguide patches; a control device for controlling a state of power supply to the plurality of switches; and an antenna for emitting electromagnetic waves for transmitting power. The wireless power-supply device is configured to change a relation of connection of the plurality of waveguide patches by turning on or off the plurality of switches, so as to change a radiation pattern of electromagnetic waves radiated from the antenna.