Orientation Adaptable Antenna for Multi-Device Wireless Charging
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Solution Overview
Problem
Existing wireless charging technologies face inefficiencies when charging devices with varying orientations, as they struggle to optimize magnetic field alignment and power transfer efficiency across different device positions and orientations relative to the charging station.
Innovation Solution
The implementation of an Orientation Adaptable Antenna (OAA) system, which uses arrays of conductor traces and magnetic shielding layers to generate magnetic fields at various orientations, combined with a Hybrid Class Power Amplifier (HCPA) for efficient power transfer, allows for adaptable magnetic field alignment and efficient charging across multiple device orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a fixed-orientation antenna is used for wireless charging, then the charging efficiency is optimized for a specific device orientation, but the charging efficiency deteriorates when the device orientation varies
Solution Approach 1:
The antenna system is divided into multiple independent antenna elements arranged in specific geometric patterns (e.g., rectangular, circular arrays). Each element can be independently controlled to generate magnetic fields in different orientations, allowing the system to segment the charging function across multiple specialized components rather than relying on a single fixed-orientation antenna
Solution Approach 2:
The system dynamically adjusts the excitation phases and amplitudes of individual antenna elements based on real-time detection of device orientation and position. By changing the relative phases of currents in different antenna elements, the system can dynamically steer and reshape the magnetic field distribution to match the device's current orientation, making the charging efficiency adaptive rather than fixed
2Adaptability or versatility
If multiple antenna elements are added to support multiple orientations, then the adaptability to different device orientations is improved, but the device complexity increases
Solution Approach 1:
Multiple antenna elements are merged into a single integrated antenna array structure that functions as one unified system. The elements share common feeding networks, control circuits, and detection mechanisms, allowing them to operate cooperatively rather than as separate independent systems. This merging reduces overall system complexity compared to having multiple separate charging systems
Solution Approach 2:
The antenna array is designed to perform multiple functions: it can detect device presence and orientation, generate magnetic fields for various orientations, and adapt its radiation pattern dynamically. This multi-functionality is achieved through a single versatile platform that eliminates the need for separate systems for each function, thereby reducing overall device complexity
3Reliability
If the magnetic field orientation is adjusted to match device orientation, then the coupling coefficient is optimized, but the power transfer efficiency varies with device position
Solution Approach 1:
The system incorporates detection circuits that continuously monitor device orientation, position, and coupling conditions. This feedback information is used to dynamically adjust the excitation parameters of antenna elements, creating a closed-loop control system that optimizes both coupling coefficient and power transfer efficiency based on real-time conditions rather than fixed pre-configuration
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
This solution enables efficient wireless power transfer to devices oriented in various positions, optimizing coupling coefficients and current usage, thereby enhancing charging efficiency and flexibility in wireless power scenarios.
Implementation Method 1
The charging station may generate magnetic fields that run parallel to the antenna plane, orthogonal to the antenna plane, or at any other angle via a super-position of magnetic fields at different orientations using an orientation adaptable antenna (OAA)
Implementation Method 2
The charging station may implement the OAA via arrays of conductor traces, an antenna coil, magnetic shielding layers, or any combination thereof
Data Source
AI summary
A system includes a charging station and one or more receiving devices receiving wireless power from the charging station. The charging station includes an orientation adaptable antenna (OAA). The OAA may generate a magnetic field component parallel to the plane of the OAA to charge devices oriented at 90 degrees with respect to the OAA. The OAA may generate a magnetic field along different directions within the plane parallel to the OAA. The OAA may be able to adjust the direction of the field to couple to devices with antennas in different orientations. The OAA may further produce a magnetic field normal to the plane of the OAA. The OAA may adjust the relative strengths the various directional components of the magnetic field to align the field normal to the antennas of the receiving devices in up to three dimensions, simultaneously charge receiving devices in different orientations, or both.