RF Wireless Charging Antenna Array Spatial Shaping
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Solution Overview
Problem
Current wireless power charging systems face limitations in charging distance due to safety regulations that restrict the field strength of RF energy, making it difficult to efficiently charge devices at longer ranges while ensuring human safety.
Innovation Solution
A long-distance wireless charging system using a transmitter with multiple antennas and sensors to shape RF radiation, focusing energy on the receiver while minimizing exposure around humans or animals by controlling amplitudes and phases of RF radiation, and utilizing image analysis and communication interfaces for precise positioning and power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If RF-based wireless charging is used to deliver power to larger distances, then charging distance is improved, but RF energy exposure to humans exceeds safety regulations
Solution Approach 1:
The patent applies local quality by creating spatially differentiated RF energy distribution - high energy concentration at the receiver location and low energy levels in surrounding areas where humans may be present. This is achieved through phased array antenna technology that independently controls the amplitude and phase of each antenna element, enabling localized energy delivery while maintaining safety in other regions.
Solution Approach 2:
The patent segments the RF radiation field into multiple controllable zones using an array of antenna elements. Each antenna element can be independently controlled to contribute differently to the overall radiation pattern, allowing the system to shape the energy distribution in space - concentrating energy where needed for charging while minimizing exposure in other directions.
2Power
If inductive charging or resonance-based charging is used, then power delivery capability is improved, but transmitter to receiver distance is limited
Solution Approach 1:
The patent employs parameter changes by operating in the RF frequency range rather than using traditional inductive or resonant frequencies. This fundamental parameter change enables longer transmission distances while maintaining power delivery capability. The system uses RF waves with frequencies typically in the MHz to GHz range, which have longer wavelengths and can propagate over greater distances compared to lower frequency inductive charging methods.
3Productivity
If RF energy is concentrated on receiver for long-range charging, then power transfer efficiency is improved, but safety regulation compliance deteriorates
Solution Approach 1:
The patent applies dynamics by making the RF radiation pattern adjustable and reconfigurable in real-time. The system can dynamically change the amplitude and phase of each antenna element based on the receiver's position and the locations of humans in the vicinity. This dynamic adaptation allows the system to maintain high power transfer efficiency to the receiver while simultaneously ensuring safety compliance in areas where humans are present.
Solution Approach 2:
The patent implements feedback mechanisms to continuously monitor the RF radiation environment and adjust the transmission parameters accordingly. By detecting the positions of receivers and humans, the system can modify the radiation pattern in real-time to maintain both efficient power transfer and safety compliance, creating a closed-loop control system that balances performance and safety.
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 long-range wireless charging while adhering to safety regulations by concentrating RF energy on the receiver and reducing exposure around humans or animals, ensuring compliance and effective power transfer.
Implementation Method 1
a transmitter, having a controller, configured to shape the RF radiation to peak the RF radiation on the location of the at least one receiver and null the RF radiation around the position of the at least one animal by controlling amplitudes and phases of the RF radiation transmitted from each antenna
Data Source
AI summary
According to a first aspect of a long-distance wireless charging system for charging at least one receiver in a venue that is used by humans or animals, the long-distance wireless charging system comprises a plurality of antennas aligned for transmitting RF radiation to a space within the venue; at least one sensor for determining a position of at least one animal and a location of the at least one receiver in the space; and a transmitter, having a controller, configured to shape the RF radiation to peak the RF radiation on the location of the at least one receiver and null the RF radiation around the position of the at least one animal by controlling amplitudes and phases of the RF radiation transmitted from each antenna of the plurality of antennas.