Multi-Antenna Wireless Power Layout With Shared Power Electronics
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in creating large antennas without compromising coil sensitivity, self-resonance, and increasing the bill of materials by using multiple driver-to-antenna subsystems.
Innovation Solution
A wireless power transmission system utilizing a power conditioning system connected to multiple transmission antennas, where the antennas are in series or parallel electrical connection, with distributed capacitors, to enable efficient power transfer without separate amplifier circuitry for each antenna.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple driver-to-antenna subsystems are used to extend coupling envelope, then coupling area is increased, but bill of materials increases drastically due to separate amplifier circuitry for each antenna
Solution Approach 1:
The patent merges multiple antenna systems into a single integrated structure where multiple antenna elements (first, second, third, and fourth antennas) share common amplifier circuitry and control electronics. This consolidation allows the system to maintain extended coupling envelope and multiple receiver transmission capabilities while drastically reducing the bill of materials by eliminating the need for separate amplifier circuitry for each antenna element.
Solution Approach 2:
The shared amplifier circuitry and common electronics are designed to serve multiple antenna elements simultaneously, enabling the system to perform multiple functions (driving different antennas for different receivers) with a single universal component set. This multi-functionality approach allows dynamic allocation of antenna resources without requiring dedicated hardware for each potential receiver connection.
2Area of stationary object
If antenna size is increased to extend coupling envelope, then transmission range is improved, but coil sensitivity and self-resonance are compromised
Solution Approach 1:
The patent divides the antenna system into multiple discrete antenna elements (first, second, third, and fourth antennas) that can be independently optimized for size and performance characteristics. Each antenna element can be designed within optimal size constraints to maintain coil sensitivity and self-resonance, while the collective array of segmented antennas provides extended coupling envelope and transmission range through coordinated operation.
Solution Approach 2:
The system extends transmission range not by increasing the physical size of individual antennas beyond optimal limits, but by adding spatial distribution through multiple antenna elements arranged in a multi-dimensional configuration. This allows the system to achieve extended coupling envelope through geometric arrangement rather than through scaling up individual antenna dimensions, thereby preserving coil sensitivity and self-resonance characteristics.
3Power
If high frequency operation is used, then power transfer characteristics are improved, but coil size constraints and coupling efficiency are reduced
Solution Approach 1:
The patent employs multiple smaller antenna elements operating at high frequency rather than a single large antenna. Each segmented element maintains optimal size for high-frequency operation, avoiding the self-resonance and coupling efficiency problems that arise with large coils at high frequencies. The collective array of segmented elements achieves the required power transfer characteristics through coordinated operation while maintaining appropriate size constraints for each individual element.
Solution Approach 2:
The system combines multiple high-frequency antenna elements with shared amplifier circuitry to achieve cumulative power transfer capability. By merging the output of a single high-power amplifier across multiple antenna elements, the system achieves improved overall power transfer characteristics without requiring each individual antenna to be oversized, thereby maintaining high-frequency operation benefits while avoiding size-related performance degradation.
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
The system allows for efficient, single, and simultaneous power transfer with a lower-cost bill of materials, improved coil sensitivity, and increased coil-to-coil efficiency, while maintaining a thin design and mechanical durability.
Implementation Method 1
a power amplifier configured to condition input electrical power to output electrical power... a first transmission antenna configured to transmit the output electrical power... a second transmission antenna configured to transmit the output electrical power
Implementation Method 2
Wireless connection systems are used in a variety of applications for the wireless transfer of electrical energy, electrical power, electromagnetic energy... Such systems often use inductive wireless power transfer, which occurs when magnetic fields created by a transmitting element induce an electric field
Data Source
AI summary
A wireless power transmission system includes, at least, a first transmission antenna and a second transmission antenna, both in electrical connection with a common power conditioning system of the system. The first transmission antenna transmits output power and includes a first pole and a second pole, while the second transmission antenna also transmits the output power and includes a third pole and a fourth pole. The first and second transmission antennas are in electrical connection with the power conditioning system via at least one of the first pole and the second pole and at least one of the third pole and the fourth pole. Further, at least one of the first pole and the second pole is in electrical connection with at least one of the third pole and the fourth pole.