Metamaterial-enhanced coupling between magnetic dipoles for efficient wireless power transfer

  title={Metamaterial-enhanced coupling between magnetic dipoles for efficient wireless power transfer},
  author={Yaroslav A. Urzhumov and David R. Smith},
  journal={Physical Review B},
Nonradiative coupling between conductive coils is a candidate mechanism for wireless energy transfer applications. In this paper we propose a power relay system based on a near-field metamaterial superlens and present a thorough theoretical analysis of this system. We use time-harmonic circuit formalism to describe all interactions between two coils attached to external circuits and a slab of anisotropic medium with homogeneous permittivity and permeability. The fields of the coils are found in… 

Figures from this paper

Magnetic superlens-enhanced inductive coupling for wireless power transfer

We investigate numerically the use of a negative-permeability “perfect lens” for enhancing wireless power transfer between two current carrying coils. The negative permeability slab serves to focus

Enhanced wireless power transfer using magnetostatic volume modes in anisotropic magnetic metamaterials

  • Qian WuYunhui Li Zhi Ning Chen
  • Physics
    2018 IEEE International Conference on Industrial Electronics for Sustainable Energy Systems (IESES)
  • 2018
According to the perfect lens theory, wireless power transfer (WPT) efficiency can be improved significantly by positioning a magnetic metamaterial (MM) slab with effective permeability of −1 between

Improving power transfer efficiency in bio-telemetry systems using negative permeability metamaterials

Summary form only given. Wireless power transfer over short distances is increasingly used to power implanted biomedical devices. A typical power transfer system consists of an external coil outside

Wireless Power Transfer System Using Sub-Wavelength Toroidal Magnetic Metamaterials

In recent years, the traditional four-coil magnetic resonance coupled wireless power transfer (WPT) system has been applied to wireless charging of mobile electronic devices and electric vehicles.

Design of unit cell for metamaterials applied in a wireless power transfer system

Magnetic superlens is a homogeneous and isotropic solid planar slab with negative permeability (usually −1) and can be applied in a wireless power transfer system to enhance the power transfer

Effects of Metamaterial Slabs Applied to Wireless Power Transfer at 13.56 MHz

This paper analyzes the effects of a metamaterial slab (or a practical “perfect lens”) with negative permeability applied to a two loop magnetically coupled wireless power transfer (WPT) system at

A Compact Magnetically Dispersive Surface for Low-Frequency Wireless Power Transfer Applications

We present a compact, magnetically dispersive engineered surface for resonant inductive wireless power transfer (WPT) that significantly enhances the performance of an inductive link, increasing the

Experimental investigation of compact metamaterial for high efficiency mid-range wireless power transfer applications

We investigate a compact metamaterial for enhanced magnetic coupling in a resonator coupled wireless power transfer system operating at around 6.5 MHz. The metamaterial is constructed by realizing an

Magnetic Metamaterial Superlens for Increased Range Wireless Power Transfer

The impact of a magnetic metamaterial (MM) superlens on long-range near-field WPT is demonstrated, quantitatively confirming in simulation and measurement the conditions under which thesuperlens can enhance power transfer efficiency compared to the lens-less free-space system.

Experiments on adjustable magnetic metamaterials applied in megahertz wireless power transmission

Over the past few years, various metamaterials have been designed and applied in antenna systems. In this paper, a new structure of magnetic metamaterials is proposed for megahertz wireless power



Wireless power transfer with metamaterials

In this paper, wireless power transfer based on resonant coupling with metamaterials is studied. We show with numerical studies that the coupling between transmitter and receiver can be enhanced, and

Waves and Fields in Inhomogeneous Media

Preface. Acknowledgements. 1: Preliminary background. 2: Planarly layered media. 3: Cylindrically and spherically layered media. 4: Transients. 5: Variational methods. 6: Mode matching method. 7:


  • 1962

Microwave Theory and Techniques MTT-32

  • 1984