Efficient wireless non-radiative mid-range energy transfer

By A. Karalis, John D. Joannopoulos, Marin Soljačić. 2006

1,484 citations recorded by the source corpus.

Abstract We investigate whether, and to what extent, the physical phenomenon of long-lifetime resonant electromagnetic states with localized slowly-evanescent field patterns can be used to transfer energy efficiently over non-negligible distances, even in the presence of extraneous environmental objects. Via detailed theoretical and numerical analyses of typical real-world model-situations and realistic material parameters, we establish that such a non-radiative scheme can lead to “strong coupling” between two medium-range distant such states and thus could indeed be practical for efficient medium-range wireless energy transfer.

View Paper: https://www.semanticscholar.org/paper/8c4f29e9945dceec1b3735d5dbbd4a7a7c0ebb5a

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1. Emil Björnson
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4. Yong Zeng
5. Xiao Lu
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8. Dusist Niyato

Citations in the corpus

• Design and Optimization of a 3-Coil Inductive Link for Efficient Wireless Power Transmission (2011, methodology): “Instead, we have demonstrated that a 3-coil inductive power transfer link, initially proposed in [26], not only provides as high PTE as the 4-coil method but also offers a PDL that is”
• Frequency Splitting Phenomena of Magnetic Resonant Coupling Wireless Power Transfer (2014, background): “Different from the CMT modeling, the circuit theory modeling is adopted in this paper.”
• Circuit-Model-Based Analysis of a Wireless Energy-Transfer System via Coupled Magnetic Resonances (2011, background): “Recently, the Massachusetts Institute of Technology has proposed a new scheme based on strongly coupled magnetic resonances, thus presenting a potential breakthrough for midrange wireless energy transfer [12], [ 13 ].”
• A Comparative Study Between Novel Witricity and Traditional Inductive Magnetic Coupling in Wireless Charging (2011, methodology): “Unlike conventional inductive coupling methods, there are only very small energy dissipations in off-resonant objects for systems working on Witricity principle [5].”
• The Circuit Theory Behind Coupled-Mode Magnetic Resonance-Based Wireless Power Transmission (2012, methodology): “Because they are basically the same [37]! We have also presented the measurement results, which show the accuracy of both RLT and CMT models in estimating the PTE.”
• Fundamental Aspects of Near-Field Coupling Small Antennas for Wireless Power Transfer (2010, background): “The feasibility of this transfer depends on power transfer efficiency, and the results on this topic were reported recently [1]‐[ 3 ].”
• Massive MIMO is a Reality - What is Next? Five Promising Research Directions for Antenna Arrays (2019, background): “Resonant evanescent wave coupling has been used for wireless power transfer between a pair of coils, at the 10 MHz carrier frequency (30 m wavelength): 60 W of power transfer was achieved over a range of two meters with 40 % efficiency [93].”
• Relay Effect of Wireless Power Transfer Using Strongly Coupled Magnetic Resonances (2011, background): “To overcome these problems, a new wireless power transfer technology, commonly called wireless electricity, has been reported [5], [ 6 ].”
• Industrial Wireless Sensor Networks: Challenges, Design Principles, and Technical Approaches (2009, methodology): “using magnetic coupling between two copper coils is possible [13].”
• Joint mobile energy replenishment and data gathering in wireless rechargeable sensor networks (2011, methodology): “It computes the migration tour of the SenCar based on the joint consideration of recharging demand and data gathering performance, and also adapts adjustable system parameters to the up-to-date energy replenishing status to optimize the data gathering scheme.”
• Wireless Charging Technologies: Fundamentals, Standards, and Network Applications (2015, methodology): “coupling [51], as shown in Figure 5b, is based on evanescentwave coupling which generates and transfers electrical energy between two resonant coils through varying or oscillating mag-”
• A Critical Review of Wireless Power Transfer via Strongly Coupled Magnetic Resonances (2014, unknown): “Normally, either coupled mode theory (CMT) [9–17] or circuit theory (CT) [18–35] can be used for analyzing SCMR.”