Rectangular coils optimization for wireless power transmission
Article first published online: 27 JUN 2012
©2012. American Geophysical Union. All Rights Reserved.
Volume 47, Issue 3, June 2012
How to Cite
2012), Rectangular coils optimization for wireless power transmission, Radio Sci., 47, RS3012, doi:10.1029/2011RS004970., , and (
- Issue published online: 27 JUN 2012
- Article first published online: 27 JUN 2012
- Manuscript Accepted: 11 MAY 2012
- Manuscript Revised: 7 MAY 2012
- Manuscript Received: 12 DEC 2011
- mutual coupling;
- power transmission;
 Wirelessly coupled coils are crucial for efficient power transmission in various applications. Previous design methods are only eligible for improving the efficiency of circular or square coils. This paper presents a method of characterizing and optimizing rectangular coils used in inductively coupled systems. After setting up a lumped component model for inductive coils, the efficiency can be expressed in terms of geometrical parameters of the coils. Subsequently, the power efficiency can be plotted versus these parameters in Matlab, thus getting the desired coils for optimum power transfer. With this design procedure from mathematical optimization, we eventually designed two rectangular coils spaced 10 mm apart, which achieves a power transmission efficiency of 46.4% at a frequency of 3 MHz. The design methodology is verified by simulation and measurement.