Far-field Wireless Power Transmitter with Dynamic Beam Steering
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Solution Overview
Problem
Conventional wireless charging systems are limited in their ability to transmit energy over meaningful distances and do not effectively manage power wave production or track devices in three-dimensional spaces, failing to adapt to user mobility and ensuring compliance with electromagnetic field exposure standards.
Innovation Solution
The system generates and transmits power waves that converge at predetermined locations to form pockets of energy, using sensor data and heat-map information to adjust power levels and directionality, ensuring safe exposure limits and accurate device tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If magnetic resonance is used to transmit power wirelessly, then devices can be powered without wired connection, but the device must be proximately located within a magnetic field which limits transmission distance
Solution Approach 1:
The patent transitions from near-field magnetic resonance (3D localized field) to far-field electromagnetic radiation (propagating waves through space), adding the dimension of wave propagation through the environment. This allows power transmission across rooms or buildings rather than requiring proximity to a coil.
Solution Approach 2:
The patent replaces the mechanical/coupling-based magnetic resonance system with an electromagnetic wave-based system. Instead of requiring magnetic field coupling between transmitter and receiver coils, the system uses electromagnetic waves that can travel through air and be detected by antennas, eliminating the need for strong magnetic field coupling.
2Adaptability or versatility
If conventional systems transmit power waves in fixed directions, then power transmission is simple to control, but the systems cannot track or adapt to mobile devices moving in three-dimensional space
Solution Approach 1:
The patent implements dynamic beam steering and tracking capabilities where the transmitter can adjust the direction and focus of power waves in real-time based on receiver position. The system continuously updates transmission parameters to maintain optimal power delivery as devices move through the service volume.
Solution Approach 2:
The patent creates a universal power transmission system that can serve multiple devices simultaneously at different locations and orientations. The transmitter can divide the service volume into sectors and independently manage power transmission to each sector, allowing one system to handle diverse mobile devices throughout a three-dimensional space.
3Length of moving object
If high power waves are transmitted to enable remote powering, then transmission distance increases, but electromagnetic field exposure may exceed regulatory safety limits
Solution Approach 1:
The patent concentrates power transmission into focused beams directed specifically at receiver devices rather than broadcasting energy uniformly in all directions. This localized energy delivery achieves the necessary power density at the receiver while keeping exposure levels in surrounding areas below regulatory limits.
Solution Approach 2:
The patent implements feedback mechanisms where the transmitter monitors receiver position, power reception status, and environmental conditions to dynamically adjust transmission parameters. This closed-loop control ensures sufficient power delivery to the receiver while preventing excessive EMF exposure in the surrounding environment.
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 efficient wireless power transmission in three-dimensional spaces, adapting to device movement and ensuring compliance with regulatory safety standards by forming energy pockets at specific locations, enhancing user mobility and safety.
Implementation Method 1
transmitting power waves that converge at predetermined locations to form pockets of energy
Data Source
AI summary
An example method includes: before receiving any communications from any device within a transmission field of a far-field transmitter, transmitting, by the transmitter, exploratory power waves towards different segments of the transmission field. The method also includes: receiving, by the transmitter and from a receiver, a communication signal including one or more parameters: (i) identifying a first location of the receiver within a segment of the different segments at which an exploratory power wave was received and (ii) providing feedback regarding the exploratory power wave. The method further includes, upon receiving the parameters: storing, by the transmitter, the one or more parameters into a mapping memory; and determining, based on the first location and the feedback, a set of characteristics for a plurality of power waves. The method additionally includes: transmitting, by the transmitter, the plurality of power waves with the determined set of characteristics to the first location.