Series Coil Antenna Layout for Uniform Wireless Power Transfer
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in achieving uniform power transmission over large areas, particularly when the receiver is in motion, due to variations in the strength of the emitted field, and often require increased use of conductive metals which raises cost, environmental, and sustainability concerns.
Innovation Solution
The design of molecule-based wireless power transmission antennas with a series connection configuration and internal repeaters, which utilize capacitors to maintain phase balance and reduce the length of conductive wires, enhancing uniformity ratio and metal resiliency while minimizing material usage, and incorporating demodulation circuits for efficient data signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional wireless power transmission systems use more conductive metals to enhance field uniformity, then uniformity ratio improves, but cost, environmental impact, and material usage increase
Solution Approach 1:
The antenna is divided into multiple antenna molecules (e.g., six molecules 123) arranged in a series configuration. Each molecule contains coil atoms that generate magnetic fields, and the series connection ensures that all molecules contribute equally to the overall field, maintaining uniformity without requiring excessive metal material in any single location.
Solution Approach 2:
Capacitors are introduced as intermediary components between antenna molecules to maintain phase balance. These capacitors compensate for parasitic capacitance variations and ensure that magnetic fields from all molecules remain in phase, achieving uniform field distribution without adding more conductive metal.
2Area of stationary object
If wireless power transmission systems are designed for large charge areas, then coverage area increases, but field strength variations and coupling consistency deteriorate
Solution Approach 1:
The large charge area antenna is segmented into multiple antenna molecules distributed across the charging surface. Each molecule acts as an independent power transmission unit, and their combined effect creates a large coverage area while maintaining consistent coupling through series connection and phase balancing.
Solution Approach 2:
Each antenna molecule is designed with specific local characteristics (coil atoms arranged in particular patterns) that optimize its individual performance. The series connection of these locally optimized molecules creates a globally uniform field across the large charge area, allowing consistent coupling regardless of receiver position.
3Ease of manufacture
If antenna molecules are connected in parallel configuration, then manufacturing is simplified, but phase balance and field uniformity deteriorate due to parasitic capacitance variations
Solution Approach 1:
The system dynamically compensates for parasitic capacitance variations through the series connection configuration. By connecting antenna molecules in series rather than parallel, the design inherently balances the impact of parasitic capacitance across all molecules, maintaining phase coherence without requiring complex dynamic adjustment mechanisms.
4Power
If more coil atoms are used in antenna molecules, then magnetic field strength increases, but metal usage and cost increase
Solution Approach 1:
Instead of using excessive metal in single large coils, the system segments the antenna into multiple molecules with fewer coil atoms each. The series connection of these segmented coils produces cumulative magnetic field strength equivalent to or greater than traditional designs, while using less total metal material.
Solution Approach 2:
The antenna employs a composite structure combining coil atoms with capacitor elements. This composite approach allows the system to achieve strong magnetic fields through resonant coupling and phase-balanced interference, reducing the need for large quantities of conductive metal while maintaining or enhancing field strength.
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 approach enables efficient, uniform wireless power transmission over large areas with reduced material usage, improved metal resiliency, and cost-effectiveness, while maintaining performance even in environments with metallic interference, and allows for accurate and fast data signal decoding.
Implementation Method 1
wireless transfer of electrical power and/or electrical data signals
Implementation Method 2
inductive and/or resonant inductive wireless power transfer, which occurs when magnetic fields created by a transmitting element induce an electric field and, hence, an electric current, in a receiving element
Implementation Method 3
resonant inductive wireless power transfer
Data Source
AI summary
An antenna for wireless power transmission includes a source antenna molecule configured for wired electrical connection to one or more electrical components of a wireless power transmission system. The antenna further includes one or more connected antenna molecules connected to the source antenna and one another via a wired, series electrical connection, each of the source antenna and the one or more connected antenna molecules at least partially overlapping with another of the source antenna and the one or more connected antenna molecules.