Metamaterial-Enhanced Magnetic Coupling: An Inductive Wireless Power Transmission System Assisted by Metamaterial-Based &amp;micro;-Negative Lenses

Almeida, Jorge Virgilio de; Feitoza, Renato S.

doi:10.1109/mmm.2018.2813858

Cited by 11 publications

(8 citation statements)

References 12 publications

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“…Since no straight relationship between resonance amplitude and bandwidth can be derived for the DR as the one found in (7), its bandwidth enhancement capabilities must be investigated by comparing it with the linear limit.…”

Section: Criterium To Determine the Bandwidth Enhancementmentioning

confidence: 99%

“…First, a normalized amplitude-bandwidth limit for the linear case ( = 0) must be defined. Substituting (7) and ( 9) into ( 16), the maximum achievable charge amplitude A 0 for the linear case is obtained at ω 0 :…”

Section: Criterium To Determine the Bandwidth Enhancementmentioning

confidence: 99%

“…The main properties and focalization effect of MTMs based on linear resonators have been extensively discussed in [5,6]. As has been discussed in [7], the MNG MTM slab at its operating frequency supports the propagation of magneto-inductive (MI) waves on its surface capable of coupling with the evanescent magnetic modes generated by the transmitter (TX) driver, which generates the apparent focusing process perceived as band-limited amplification, gain, or enhanced coupling. Since MI wave propagation on the MTMs' surface is a collective behavior, it is much more tolerant to fabrication defects or misalignments.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear Metamaterial Lenses for Inductive Power Transmission Systems Using Duffing-Resonator Based Unit Cells

Almeida

Mosso

et al. 2021

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Metamaterials (MTMs) based on a periodic array of resonant coils have been shown to behave as μ-negative (MNG), enabling the focusing of magnetic flux. The phenomenon has been deployed by designers to boost the efficiency of many inductively coupled systems, such as magnetic resonance imaging, underwater and underground communications, and charging base stations (CBS) for consumer electronics and implanted devices. However, due to their dependency on high-Q unit cells, linear MNG-like MTMs have limited bandwidth, restricting their use in many applications, notably in near-field simultaneous wireless information and power transmission (NF-SWIPT) systems. To improve the tight constraints of the amplitude-bandwidth trade-off of artificial magnetic lenses, this paper presents a theoretical analysis of nonlinear MTMs based on a lattice of Duffing resonators (DRs). Additionally, it introduces a criterium for the quantification and evaluation of the amplitude-bandwidth enhancement. The analytical results are based on a circuit model and further verified by numerical simulations using commercial software. The preliminary findings in this paper open up possibilities for nonlinear MTM lenses and can be applied to enhance the linear amplitude-bandwidth limit.

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Section: Criterium To Determine the Bandwidth Enhancementmentioning

confidence: 99%

Section: Criterium To Determine the Bandwidth Enhancementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nonlinear Metamaterial Lenses for Inductive Power Transmission Systems Using Duffing-Resonator Based Unit Cells

Almeida

Mosso

et al. 2021

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“…Since it was first proposed by Sultanbek et al [6], in 2007, WPT has gained popularity due to its simplicity and functionality [7]. Over the past few years, it has been implemented in a wide range of applications from household applications [8], [9] to medical implants [10]. In the past few years, researchers have been working towards implementation of WPT technology in the EVs [11], [12].…”

Section: Introductionmentioning

confidence: 99%

Smart Wireless Power Transmission System for Autonomous EV Charging

et al. 2019

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This paper presents a novel localization method for electric vehicles (EVs) charging through wireless power transmission (WPT). With the proposed technique, the wireless charging system can selfdetermine the most efficient coil to transmit power at the EV's position based on the sensors activated by its wheels. To ensure optimal charging, our approach involves measurement of the transfer efficiency of individual transmission coil to determine the most efficient one to be used. This not only improves the charging performance but also minimizes energy losses by autonomously activating only the coils with the highest transfer efficiencies. The results show that with the proposed system, it is possible to detect the coil with maximum transmitting efficiency without the use of actual power transmission and comparison of the measured efficiency. This paper also proves that with the proposed charger setup , the position of the receiver coil can be detected almost instantly, which indeed saves energy and boosts the charging time. INDEX TERMS Wireless power transmission, car charging, electrical vehicle, efficiency, charging pad, sensor network, smart charger.

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“…Electromagnetic MTM slabs presenting effective negative permeability can be used as near-field lenses to improve the overall efficiency of such inductive power transmission systems by enhancing the inductive coupling between the antennas. It has been called MTM-enhanced coupling [3]- [5].…”

Section: Introductionmentioning

confidence: 99%

Mu-Negative Metamaterials Seen as Band-Limited Non-Foster Impedances in Inductive Power Transmission Systems

Almeida

Siqueira

Mosso

et al. 2019

J. Microw. Optoelectron. Electromagn. Appl.

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Metamaterial-Enhanced Magnetic Coupling: An Inductive Wireless Power Transmission System Assisted by Metamaterial-Based µ-Negative Lenses

Cited by 11 publications

References 12 publications

Nonlinear Metamaterial Lenses for Inductive Power Transmission Systems Using Duffing-Resonator Based Unit Cells

Nonlinear Metamaterial Lenses for Inductive Power Transmission Systems Using Duffing-Resonator Based Unit Cells

Smart Wireless Power Transmission System for Autonomous EV Charging

Mu-Negative Metamaterials Seen as Band-Limited Non-Foster Impedances in Inductive Power Transmission Systems

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