Coaxial Wireless Power Structures Prevent Antenna Detuning
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Solution Overview
Problem
Conventional wireless charging systems face inefficiencies when devices are placed close together, leading to antenna detuning and unwanted current injection, which increases costs due to the need for tuning circuits.
Innovation Solution
The implementation of coaxial structures that carry and transfer RF signals between a transmitter and receiver, preventing power leakage by maintaining the same RF field distribution when in proximity, allowing efficient wireless power transfer without the need for additional tuning circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional antennas are used for wireless power transfer, then power can be transmitted wirelessly, but antenna detuning and unwanted current injection occur when devices are placed close together
Solution Approach 1:
The patent changes the fundamental parameter of the transmitting structure from a conventional antenna to a coaxial structure. This parameter change allows the system to maintain stable power transfer efficiency without detuning issues when devices are placed in close proximity, as the coaxial structure inherently maintains its electromagnetic field distribution regardless of nearby objects.
2Ease of operation
If conventional antennas are used, then wireless charging can be implemented, but additional tuning circuits are required when devices are placed close together, increasing cost
Solution Approach 1:
The patent extracts and eliminates the need for tuning circuits from the wireless charging system by replacing conventional antennas with coaxial structures. This removal of unnecessary components simplifies the overall device complexity while maintaining ease of operation for wireless charging.
Solution Approach 2:
The coaxial structure is self-sufficient and maintains its electromagnetic field distribution without requiring external tuning circuits or adjustments. The structure automatically adapts to close proximity conditions without needing additional components, making the system easier to operate with reduced complexity.
3Ease of operation
If devices are placed close together for charging, then charging convenience is improved, but antenna coupling causes detuning and power loss
Solution Approach 1:
By changing from conventional antenna parameters to coaxial structure parameters, the system enables devices to be placed close together for charging convenience without suffering from coupling-induced detuning and power loss. The coaxial structure's inherent field distribution maintains efficiency regardless of proximity.
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 transfer between coaxial structures in close proximity, reducing costs and improving charging efficiency by preventing unwanted current injection and maintaining effective power transfer.
Implementation Method 1
a first coaxial structure configured to carry an RF signal present on a conductor; and a second coaxial structure configured to be excited by an RF signal from the first coaxial structure, power being transferred from the first coaxial structure to the second coaxial structure when the first coaxial structure and the second coaxial structure are placed in proximity to each other
Data Source
AI summary
A wireless charging system comprises (i) a transmitter structure comprising a first metallic core disposed in an opening of the transmitter structure and (ii) a receiver structure comprising a second metallic core disposed in an opening of the receiver structure. The transmitter structure is configured to carry one or more radio frequency (RF) signals to the first metallic core when the receiver structure is within a threshold distance from the transmitter structure. In addition, the receiver structure is configured to be excited by the one or more RF signals from the transmitter structure, whereby the one or more RF signals are transferred from the first metallic core to the second metallic core when the transmitter structure and the receiver structure are within the threshold distance from each other.