Monopulse Antenna Beam Tracking for Remote Wireless Charging

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Solution Overview

Problem

Current wireless charging technologies require precise alignment and close proximity between charging devices, limiting their use to static positions, making it impossible to charge devices while in use or at a distance.

Innovation Solution

A wireless charging method utilizing a monopulse antenna array that transmits sum and difference beams to track the position of a to-be-charged device and dynamically adjust power and phase for optimal charging, allowing charging at remote distances and during movement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If electromagnetic induction wireless charging is used, then wireless charging function is achieved, but device position must remain fixed and distance must be extremely close

Engineering Contradiction:

Improvewireless charging convenienceVSAvoidcharging position flexibility

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent applies dynamics by transitioning from fixed coil alignment to dynamic beam tracking. The monopulse antenna array continuously tracks the mobile device's position changes and dynamically adjusts the charging beam direction, enabling wireless charging while the device moves or is held at different positions, thus resolving the contradiction between wireless charging convenience and position flexibility

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent replaces the mechanical coil-to-coil alignment system with an electromagnetic beam tracking system. Instead of requiring physical alignment of charging coils, the system uses monopulse antenna technology to transmit and track electromagnetic beams, substituting mechanical positioning with electromagnetic field-based positioning and tracking

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If coil alignment is required for wireless charging, then charging efficiency is maintained, but device must be held stationary at fixed position

Engineering Contradiction:

Improvecharging stabilityVSAvoiddevice mobility during charging

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent implements feedback through the monopulse antenna array's ability to continuously detect the mobile device's position and provide real-time feedback for beam direction adjustment. This closed-loop tracking system maintains charging stability by automatically adapting to position changes, resolving the contradiction between charging reliability and device mobility

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The monopulse antenna array serves multiple functions: it transmits charging energy, tracks device position, and adjusts beam direction dynamically. This multi-functionality allows the system to maintain reliable charging while accommodating device movement, combining what were previously separate functions into a single integrated system

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Power

If close proximity between charger and device is required, then electromagnetic induction charging works, but remote distance charging is impossible

Engineering Contradiction:

Improvecharging power transmissionVSAvoidcharging distance

Core Design Contradiction:

PowerVSLength of stationary object

Solution Approach 1:

The patent applies parameter changes by transitioning from near-field electromagnetic induction to far-field beam transmission. The monopulse antenna system changes the operating parameters of wireless power transmission, enabling effective charging at extended distances by using directional beam formation and tracking rather than close-proximity induction coupling

Inventive Principle:

Principle #35Parameter changes

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 wireless charging at various positions and distances, including when the device is in use or moving, by continuously tracking the device's position and adjusting the charging beam accordingly, thus overcoming the limitations of traditional wireless charging.

Implementation Method 1

controlling, in a preset tracking period, the monopulse antenna array to transmit a sum beam and a difference beam to a to-be-charged device

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Implementation Method 2

receiving an echo signal reflected from the to-be-charged device

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS20240372418A1Wireless charging method and apparatus, and electronic device

Publication Date: 2024.11.07 VIVO MOBILE COMM CO LTD

AI summary

A wireless charging method, and an electronic device, are provides. The wireless charging method is performed by a wireless charging apparatus. The wireless charging apparatus includes a monopulse antenna array. The method includes: controlling, in a preset tracking period, the monopulse antenna array to transmit a sum beam and a difference beam to a to-be-charged device, and receiving an echo signal reflected from the to-be-charged device. The preset tracking period is a period that the monopulse antenna array transmits the sum beam and the difference beam. The method further includes tracking a position of the to-be-charged device based on the echo signal. The method also includes controlling, based on position information of the to-be-charged device, the monopulse antenna array to wirelessly charge the to-be-charged device.