Next-Generation Wireless Charging Systems for Mobile Devices

Park, Youngjin

doi:10.3390/en15093119

Cited by 14 publications

(5 citation statements)

References 14 publications

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“…Interference is another challenge of RF-based wireless power transfer [60], [61] . RF-based systems can be affected by interference from other RF sources, such as radio and television stations.…”

Section: B Classic Rf Wpt Challenges: Limited Powermentioning

confidence: 99%

“…Another challenge in rectenna design for RF WPT applications is the tradeoff between efficiency and size. A rectenna with a large size may result in higher WPT efficiency than one with a small size [60], [63] , but it may also be more expensive and less practical for certain applications [60], [63] . On the other hand, a rectenna with a small size may be less efficient, but it may be more practical and cost-effective for certain applications.…”

Section: Challenges In Rectenna Design For Rf Wptmentioning

confidence: 99%

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2.4 GHz Rectifier Antenna for Radiofrequency-based Wireless Power Transfer: Recent Developments, Opportunities, and Challenges

Amri,

Sabila

2023

J. Elektron. dan Telekomun.

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The use of radio frequency (RF) energy for wireless power transfer (WPT) has gained significant attention in recent years due to its potential for powering electronic devices without the need for wires or batteries. A key component of RF-based WPT systems is the rectenna, which converts RF energy into usable DC power. This article provides an overview of recent developments, opportunities, and challenges in the design of 2.4 GHz rectennas for RF-based WPT applications. We have searched major online libraries extensively for studies regarding the 2.4 GHz rectenna. As a result, 35 high-quality studies published between 2010 and 2023 were gathered. In the discussion section, we begin by presenting the basic principles of rectenna design and the key parameters that affect its performance, such as the antenna characteristics, rectifier capabilities, and nonlinearity properties of the rectifier. We then highlighted recent advancements in rectenna design, including novel approaches for improving efficiency and power transfer capability, such as the involvement of hybrid solar cell-rectenna structures, transistor-based rectifiers, and bridge rectifiers. Finally, the article concludes by identifying future opportunities, research directions, and open challenges in the design and optimization of rectennas for RF-based WPT, including the development of compact, low-cost, and high-performance rectennas for a wide range of applications. Overall, this article provides a comprehensive overview of the state-of-the-art of 2.4 GHz rectenna design for RF-based WPT and highlights the exciting opportunities and challenges for this rapidly growing field.

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Section: B Classic Rf Wpt Challenges: Limited Powermentioning

confidence: 99%

Section: Challenges In Rectenna Design For Rf Wptmentioning

confidence: 99%

2.4 GHz Rectifier Antenna for Radiofrequency-based Wireless Power Transfer: Recent Developments, Opportunities, and Challenges

Amri,

Sabila

2023

J. Elektron. dan Telekomun.

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“…Recently,Wireless Power Transfer has received great attention in the research field. In particular, among various solutions, resonant inductive WPT has been employed in numerous applications such as biomedical implants, automotive and electronic devices [1], [2]. Such increasing request for WPT systems is caused by the significant benefits that this technology can provide.…”

Section: Introductionmentioning

confidence: 99%

Arbitrarily Conformal Metasurfaces for Enhanced Wireless Power Transfer Systems

Dellabate,

Lazzoni,

Monorchio

et al. 2024

IEEE Access

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In this paper, design guidelines and unique features of arbitrarily conformal metasurfaces for Wireless Power Transfer (WPT) systems are discussed. In particular, we demonstrate the flexibility of conformal metasurfaces in achieving different behaviors by proposing two different applicative test cases: (i) magnetic field shielding in the region behind an RF coil, as typically required in automotive WPT scenarios, and (ii) wireless power transmission with a magnetic field distribution spatially focused by the metasurface, eventually useful for electromagnetic exposure and interferences reduction. In general, the metasurface design is performed by following an analytical method that allows controlling and tailoring its response even though the array is finite, conformal and near-field excited. For both the implementations, the analytical design was corroborated by accurate full-wave simulations and experimental measurements carried out at 13.56 MHz. In particular, the possibility to obtain a 8 dB shielding effectiveness of an RF coil magnetic field at distances larger than twice of its diameter was proved. Conversely, in the second implementation, the conformal metasurface was capable to guarantee a measured power transfer efficiency of 8% for a receiver placed in correspondence of the 4 cm diameter focusing spot, while drastically reducing the magnetic field everywhere else. The results demonstrated the excellent potentialities of conformal magnetic metasurfaces for WPT applications in ensuring the electromagnetic safety for operators while simultaneously achieving enhanced performance.

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“…The power transfer can be obtained by inductive coupling, capacitive coupling, or microwave radiation [1][2][3][4][5]. Low-power charging is widely used in mobile and wearable devices, smart home appliances, smart textiles, and medical implants [6][7][8][9][10][11]. A different set of challenges emerges in high-power wireless charging applications, such as electric cargo and passenger vehicles, ships, airborne vehicles, unmanned vehicles (drones) and space vessels [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Double-Layer Coils Design for 11 kW Wireless Power Transfer

Herceg,

Rajs,

Despotović

et al. 2024

Electronics

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The design of a wireless power transfer system with double rectangular coils for 11 kW power transfer is considered. System modeling and numerical calculation of the system parameters are described. Coils are made from available Litz wire, which has a smaller than necessary diameter for the required power. Thus, a setup with double layer coils was developed, which resulted in a modified design. Starting from a system consisting of coupled coils, as suggested by the standard for wireless power transfer Level 3 in class Z1, different coil and ferrite shield layouts were tested in numerical simulations, and their parameters were calculated. The prototype was constructed based on the simulated model with the best results and properties. Numerical results were verified by laboratory measurements, and a successful power transfer at 11 kW was achieved.

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Next-Generation Wireless Charging Systems for Mobile Devices

Abstract: Wireless power transfer (WPT) is currently sparking more attention towards the application of wireless charging for mobile devices and electric vehicles [...]

Cited by 14 publications

References 14 publications

2.4 GHz Rectifier Antenna for Radiofrequency-based Wireless Power Transfer: Recent Developments, Opportunities, and Challenges

2.4 GHz Rectifier Antenna for Radiofrequency-based Wireless Power Transfer: Recent Developments, Opportunities, and Challenges

Arbitrarily Conformal Metasurfaces for Enhanced Wireless Power Transfer Systems

Double-Layer Coils Design for 11 kW Wireless Power Transfer

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