Efficiency Bound of Radiative Wireless Power Transmission Using Practical Antennas

Kim, Joon-Hong; Lim, Young-Jun; Nam, Sangwook

doi:10.1109/tap.2019.2922444

Cited by 15 publications

(7 citation statements)

References 30 publications

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“…There have been a few papers analyzing the RF WPT efficiency, e.g., [17] and [18]. In [17], the efficiency is analyzed for RF WPT from and to continuous apertures facing to each other.…”

Section: Introductionmentioning

confidence: 99%

“…In [17], the efficiency is analyzed for RF WPT from and to continuous apertures facing to each other. On the other hand, the authors of [18] have made use of the reciprocity theorem to analyze the efficiency from a continuous aperture to a single mobile antenna. However, these works cannot be used for analyzing a practical multiantenna WPT since they assume a fictitious continuous aperture transmitter or receiver.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Experiment on Multi-Antenna-to-Multi-Antenna RF Wireless Power Transfer

2021

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“…There have been a few papers analyzing the RF WPT efficiency, e.g., [17] and [18]. In [17], the efficiency is analyzed for RF WPT from and to continuous apertures facing to each other.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis and Experiment on Multi-Antenna-to-Multi-Antenna RF Wireless Power Transfer

2021

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“…In this study, the PTE bound is defined as the maximum PTE. Many studies have attempted to calculate the PTE of inductive and resonance WPT [8,9] and MPT [10][11][12][13][14][15] systems. For instance, Goubau [11] and Shinohara [10] showed that a Gaussian beam is an optimal transmission source between two planar apertures, especially in the radiative near field, and they calculated PTE using the proposed theory.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, Goubau [11] and Shinohara [10] showed that a Gaussian beam is an optimal transmission source between two planar apertures, especially in the radiative near field, and they calculated PTE using the proposed theory. The PTE bound of the radiative WPT was derived for the aperture Tx and a practical mobile antenna [12]. In these studies, the PTE bound was calculated using a continuous source of the Tx, assuming that the Tx is an aperture antenna and that the Rx is an aperture or single antenna.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Bound Estimation for a Practical Microwave and mmWave Wireless Power Transfer System Design

Kim

Lee

Nam

2023

J. Electromagn. Eng. Sci

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In this study, we present an efficient method to find the power transfer efficiency (PTE) bound for practical microwave and mmWave wireless power transfer (MPT) systems composed of transmitter (Tx) and receiver (Rx) array antennas. The PTE bound of the MPT system is obtained by formulating it as a convex optimization problem (CVP) that maximizes the power received at the Rx array under the transmit power constraint. The channel state information (CSI) between each element of the Tx and the Rx is the input parameter of the proposed CVP. The CSI is estimated using the Friis transmission equation and the active element pattern of the array antenna because the Tx and the Rx are assumed to be large arrays. For an MPT system designed at 10 GHz and 24 GHz, the estimated PTE bound is compared to those in previous studies while varying the distance and tilted angle between the Tx and the Rx. The computation times required for the methods are compared. The numerical results show that the proposed method provides a faster and more accurate PTE bound without full electromagnetic simulation of the MPT system consisting of Tx and Rx array antennas. This study's results will serve as guidelines for practical MPT system design in the future.

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“…General frequencies of interest for radiative WPT [41] are 900 MHz, 2.4 GHz and 5.8 GHz. Nevertheless, research on radiative WPT schemes are still in its infancy, and have numerous future applications [42,43].…”

Section: Introductionmentioning

confidence: 99%

A Review on Antenna Technologies for Ambient RF Energy Harvesting and Wireless Power Transfer: Designs, Challenges and Applications

et al. 2022

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Radio frequency energy harvesting (RFEH) and wireless power transmission (WPT) are two emerging alternative energy technologies that have the potential to offer wireless energy delivery in the future. One of the key components of RFEH or WPT system is the receiving antenna. The receiving antenna's performance has a considerable impact on the power delivery capability of an RFEH or WPT system. This paper provides a well-rounded review of recent advancements of receiving antennas for RFEH and WPT. Antennas discussed in this paper are categorized as low-profile antennas, multi-band antennas, circularly polarized antennas, and array antennas. A number of contemporary antennas from each category are presented, compared, and discussed with particular emphasis on design approach and performance. Current design and fabrication challenges, future development, open research issues of the antennas and visions for RFEH and WPT are also discussed in this review.

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Efficiency Bound of Radiative Wireless Power Transmission Using Practical Antennas

Cited by 15 publications

References 30 publications

Analysis and Experiment on Multi-Antenna-to-Multi-Antenna RF Wireless Power Transfer

Analysis and Experiment on Multi-Antenna-to-Multi-Antenna RF Wireless Power Transfer

Efficiency Bound Estimation for a Practical Microwave and mmWave Wireless Power Transfer System Design

A Review on Antenna Technologies for Ambient RF Energy Harvesting and Wireless Power Transfer: Designs, Challenges and Applications

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