Wireless Power Phase Control Using Backscatter Feedback
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in optimizing the phases of radio waves from multiple transmitters to maximize received power, due to difficulties in establishing wireless synchronization with low power consumption and minimal noise.
Innovation Solution
The system incorporates a wireless power transmitter with a phase shift circuit controlled by a backscatter signal receiver, which optimizes the phase of the radio wave to maximize the strength of the backscatter signal, thereby enhancing received power while minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wireless synchronization is established between transmitter and receiver to optimize phase delay, then received power is improved, but power consumption increases and noise is introduced
Solution Approach 1:
The patent introduces a backscatter signal as an intermediary to enable phase delay measurement without direct wireless communication. The backscatter signal reflects off the receiver's antenna, carrying phase information back to the transmitter while consuming minimal power at the receiver side, thus resolving the contradiction between accurate measurement and low power consumption
Solution Approach 2:
The patent replaces the conventional wireless synchronization system (which requires active communication protocols and power consumption) with a passive backscatter mechanism. This substitution eliminates the need for complex wireless synchronization while maintaining phase delay measurement capability, thereby reducing power consumption and noise
2Productivity
If phase optimization processing is performed to maximize received power, then power transfer efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the backscatter signal carries information about the received power level back to the transmitter. The transmitter uses this feedback to iteratively adjust its transmission phase, automatically converging to the optimal phase for maximum power transfer without requiring complex centralized control systems
Solution Approach 2:
The patent employs dynamic phase adjustment where the transmission phase is continuously optimized based on real-time backscatter signal feedback. This dynamic approach allows the system to adapt to changing conditions and achieve optimal power transfer efficiency without requiring a statically complex system architecture
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 allows for improved received power in wireless power transfer systems with reduced power consumption, effectively addressing the synchronization challenges faced by existing technologies.
Implementation Method 1
an antenna configured to transmit a radio wave
Implementation Method 2
a backscatter signal receiver configured to receive a backscatter signal
Data Source
AI summary
A wireless power transmitter includes an antenna that transmits a radio wave, a phase shift circuit that changes a phase of the radio wave transmitted from the antenna, a control device that controls the phase shift circuit, and a backscatter signal receiver that receives a backscatter signal. The control device executes phase optimization processing of controlling the phase shift circuit so that a strength of the backscatter signal received by the wireless power transmitter is maximized.