Analysis and experiments on Fano interference using a 2D metamaterial cavity for field localized wireless power transfer

Pham, Thanh Son; Ranaweera, A. L. A. K.; Ngo, Duc Viet; Lee, Jong‐Wook

doi:10.1088/1361-6463/aa7988

Cited by 23 publications

(17 citation statements)

References 25 publications

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“…The region of the cavities shows strong field localization (a hotspot), and the field is relatively low and uniform outside the cavities. The result shows that the defective metasurface localizes the field on the subwavelength scale with a high contrast 38 . Using a small probe to scan the metasurface, we measure the field distribution.…”

Section: Resultsmentioning

confidence: 93%

“…All the array elements on the metasurface are turned off and resonate at f loc . This frequency, which is close to f 0 , is chosen because it allows strong field localization by inhibiting MIW propagation 38 . Then, the transmission shows the asymmetric shape of the hybridization bandgap 29 , which indicates the presence of Fano-type interference (the interference between discrete resonance and continuous fields).…”

Section: Resultsmentioning

confidence: 99%

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An active metasurface for field-localizing wireless power transfer using dynamically reconfigurable cavities

Ranaweera

Pham

Bui

et al. 2019

Sci Rep

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Wireless power transfer (WPT) provides a convenient method of delivering energy to multiple devices. With the increasing use of WPT, safety concerns inevitably create the need for a reliable control mechanism. Previous approaches in advanced WPT or metamaterial-enhanced WPT, however, have the limitation that neither the intensity nor the shape of the field-localizing area can be dynamically controlled. To address this limitation, we introduce the novel concept of a hotspot or power-focused region using field-localizing WPT. Using the proposed method, we provide experimental evidence demonstrating that the location, shape, and intensity of the hotspot can be manipulated as desired. The hotspot effectively enhances power delivery to the intended device while reducing leakage to unwanted areas. To dynamically reconfigure the hotspots, we propose an active metasurface with multi-functionality due to its frequency switching and tuning capability. The dynamic reconfiguring capability provides a wide range of versatile practical applications, overcoming the limitations associated with passive metamaterials. Because the location, shape, and intensity of hotspots can readily be controlled, the proposed method is not limited to WPT applications. It can also be used for a broad range of applications that require precise control of power delivery.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

An active metasurface for field-localizing wireless power transfer using dynamically reconfigurable cavities

Ranaweera

Pham

Bui

et al. 2019

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…This is because power distribution is spread out and unrefined above the charging surface; that is the transfer efficiency is variation when a receiving device position is misaligned, which is deviated from the concentric position with respect to a transmitter [19]. To refine and control the magnetic field by focusing the fields into the small regions, the non-uniform and defected MTSs with modified field localization technique have been proposed [20,25,30,31]. The defected MTS is formed by the cavities on MTS.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, it does not change the macroscopic parameters including negative permeability. Unlike the previous approach [20,25,30], the receiver location is placed at center of the MTS. There are different mechanisms to create the cavity on the MTS.…”

Section: Introductionmentioning

confidence: 99%

“…There are different mechanisms to create the cavity on the MTS. In [30], the cavity is created by Fano-type interference, while the hybridization bandgap is used in [20] and MIW is applied in [25]. Motivated by these observations, we modify the cavity mode concept to create a new defected metasurface (MTS) for enhancing transferred efficiency and reducing the electromotive force (EMF).…”

Section: Introductionmentioning

confidence: 99%

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A Defected Metasurface for Field-Localizing Wireless Power Transfer

Chaimool¹,

Rakluea²,

Zhao³

et al. 2021

Wireless Power Transfer – Recent Development, Applications and New Perspectives

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The potential of wireless power transfer (WPT) has attracted considerable interest for various research and commercial applications for home and industry. Two important topics including transfer efficiency and electromotive force (EMF) leakage are concerned with modern WPT systems. This work presents the defected metasurface for localized WPT to prevent the transfer efficiency degraded by tuning the resonance of only one-unit cell at the certain metasurface (MTS). Localization cavities on the metasurface can be formed in a defected metasurface, thus fields can be confined to the region around a small receiver, which enhances the transfer efficiency and reduces leakage of electromagnetic fields. To create a cavity in MTS, a defected unit cell at the receiving coils’ positions for enhancing the efficiency will be designed, aiming to confine the magnetic field. Results show that the peak efficiency of 1.9% for the case of the free space is improved to 60% when the proposed defected metasurface is applied, which corresponds to 31.2 times enhancements. Therefore, the defected MTS can control the wave propagation in two-dimensional of WPT system.

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Rapid Design of Square-Spiral Metamaterial for Enhanced Wireless Power Transfer Applications Using Artificial Neural Networks

Nguyen

Hoang

Huynh

2023

Studies in Computational Intelligence

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Analysis and experiments on Fano interference using a 2D metamaterial cavity for field localized wireless power transfer

Cited by 23 publications

References 25 publications

An active metasurface for field-localizing wireless power transfer using dynamically reconfigurable cavities

An active metasurface for field-localizing wireless power transfer using dynamically reconfigurable cavities

A Defected Metasurface for Field-Localizing Wireless Power Transfer

Rapid Design of Square-Spiral Metamaterial for Enhanced Wireless Power Transfer Applications Using Artificial Neural Networks

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