Antenna Array Calibration for Wireless Charging Phase Coherency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing demand for higher processing capabilities in mobile communication devices leads to more complex integrated circuits that consume more battery power, making it challenging to prolong battery life and requiring high-capacity, expensive batteries that often need to be recharged daily.
Innovation Solution
A wireless charging station with an antenna array calibration method that adjusts relative phase errors among antenna elements to achieve phase coherency, improving wireless charging power efficiency by calibrating each antenna element upon power-up and using a training sequence to determine total relative phase errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If high-capacity batteries are used to extend battery life, then battery life is improved, but device cost and device volume increase
Solution Approach 1:
The system performs preliminary calibration of antenna elements before wireless charging begins. The calibration process determines phase errors and adjusts antenna elements in advance, ensuring optimal power transfer efficiency from the start of charging, which prevents energy waste and reduces the need for oversized batteries
Solution Approach 2:
The system dynamically adjusts phase shift parameters of antenna elements during calibration to optimize power transfer. By changing these parameters to achieve phase coherence, the system maximizes charging efficiency, thereby extending battery life without requiring larger battery capacity
2Duration of action of moving object
If high-capacity batteries are used to extend battery life, then battery life is improved, but device volume increases
Solution Approach 1:
The calibration process is performed in advance before charging operations begin. By pre-adjusting antenna phase errors and achieving phase coherence beforehand, the system ensures optimal power transfer efficiency throughout charging, which extends battery life without requiring increased battery volume
3Loss of energy
If antenna elements are calibrated to achieve phase coherency, then wireless charging power efficiency is improved, but system complexity increases
Solution Approach 1:
The calibration process is divided into distinct segments: initial calibration sequence that determines phase errors, and training sequence that refines the calibration. This segmentation makes the complex calibration process more manageable and systematic, improving power efficiency through structured phase adjustment
Solution Approach 2:
The system uses feedback from measured phase errors to adjust antenna element phases. The calibration process continuously monitors and corrects phase deviations, creating a closed-loop control system that achieves phase coherence and maximizes power transfer efficiency
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
Enhances wireless charging efficiency by ensuring phase coherency among antenna elements, allowing for more effective power distribution and longer battery life in mobile devices without the need for frequent recharging.
Implementation Method 1
transmitting calibration signals from the calibration transmitter to the calibration receiver
Implementation Method 2
Each of the plurality of antenna elements also comprises a phase shift circuitry coupled to the transmitter and configured to adjust respective transmitter phase of the transmitter
Data Source
AI summary
Antenna array calibration for wireless charging is disclosed. In one aspect, an initial calibration sequence is performed each time a wireless charging station is powered on. The initial calibration sequence utilizes a reference antenna element, which is an antenna element randomly selected from a plurality of antenna elements in the wireless charging station, to determine relative receiver phase errors between the reference antenna element and each of the other antenna elements in an antenna array. In another aspect, a training sequence is performed after completing the initial calibration sequence to determine total relative phase errors between the reference antenna element and each of the other antenna elements in the antenna array. Adjustments can then be made to match respective total relative phase errors among the plurality of antenna elements to achieve phase coherency among the plurality of antenna elements for improved wireless charging power efficiency.