Radiation Suppression Regime in Wireless Power Transfer between Two Loop Antennas

Nam Ha-Van; Constantin R. Simovski; Francisco S. Cuesta; Prasad Jayathurathnage; Sergei A. Tretyakov

doi:10.23919/EuMC58039.2023.10290483

Radiation Suppression Regime in Wireless Power Transfer between Two Loop Antennas

Nam Ha-Van, Constantin R. Simovski, Francisco S. Cuesta, Prasad Jayathurathnage, Sergei A. Tretyakov

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

1 Citation (Scopus)

27 Downloads (Pure)

Abstract

In this paper, we identify and discuss a regime of radiation suppression in wireless power transfer (WPT) between two loop antennas in free space. We show that at distances much larger than the antenna sizes there is a possibility to realize high power transfer efficiency due to partial compensation of the radiation resistances of both loops by optimizing the load impedance and the working frequency. This regime of WPT is analyzed for two relevant arrangements of these antennas: the coaxial one, when WPT is solely due to near fields, and the coplanar one, when both power transfer mechanisms are combined and the regions of mainly far-field and mainly near-field power transfer can be distinguished. We analyze and visualize the radiation suppression regime for both arrangements. Finally, the theoretical results are validated by simulations and experiments with two loop antennas.

Original language	English
Title of host publication	2023 53rd European Microwave Conference, EuMC 2023
Publisher	European Microwave Association
Pages	600-603
Number of pages	4
ISBN (Electronic)	978-2-87487-072-9
DOIs	https://doi.org/10.23919/EuMC58039.2023.10290483
Publication status	Published - 2023
MoE publication type	A4 Conference publication
Event	European Microwave Conference - Berlin, Germany Duration: 19 Sept 2023 → 21 Sept 2023 Conference number: 53

Conference

Conference	European Microwave Conference
Abbreviated title	EuMC
Country/Territory	Germany
City	Berlin
Period	19/09/2023 → 21/09/2023

Keywords

magnetic dipole
nearand far-field
radiation suppression regime
Wireless power transfer

Access to Document

10.23919/EuMC58039.2023.10290483

Dynamic_theory_WPT__EuMW2023_Accepted author manuscript, 4.89 MB

Cite this

@inproceedings{4c39e9f375fa4323bccf2f1e7e68d7ab,

title = "Radiation Suppression Regime in Wireless Power Transfer between Two Loop Antennas",

abstract = "In this paper, we identify and discuss a regime of radiation suppression in wireless power transfer (WPT) between two loop antennas in free space. We show that at distances much larger than the antenna sizes there is a possibility to realize high power transfer efficiency due to partial compensation of the radiation resistances of both loops by optimizing the load impedance and the working frequency. This regime of WPT is analyzed for two relevant arrangements of these antennas: the coaxial one, when WPT is solely due to near fields, and the coplanar one, when both power transfer mechanisms are combined and the regions of mainly far-field and mainly near-field power transfer can be distinguished. We analyze and visualize the radiation suppression regime for both arrangements. Finally, the theoretical results are validated by simulations and experiments with two loop antennas.",

keywords = "magnetic dipole, nearand far-field, radiation suppression regime, Wireless power transfer",

author = "Nam Ha-Van and Simovski, {Constantin R.} and Cuesta, {Francisco S.} and Prasad Jayathurathnage and Tretyakov, {Sergei A.}",

note = "Funding Information: ACKNOWLEDGMENT This work was partially supported by the Academy of Finland, project 338786, and the Academy of Finland postdoctoral researcher grant 333479. Publisher Copyright: {\textcopyright} 2023 European Microwave Association (EuMA).; European Microwave Conference, EuMC ; Conference date: 19-09-2023 Through 21-09-2023",

year = "2023",

doi = "10.23919/EuMC58039.2023.10290483",

language = "English",

pages = "600--603",

booktitle = "2023 53rd European Microwave Conference, EuMC 2023",

publisher = "European Microwave Association",

address = "Belgium",

}

Radiation Suppression Regime in Wireless Power Transfer between Two Loop Antennas. / Ha-Van, Nam ; Simovski, Constantin R.; Cuesta, Francisco S. et al.
2023 53rd European Microwave Conference, EuMC 2023. European Microwave Association, 2023. p. 600-603.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Radiation Suppression Regime in Wireless Power Transfer between Two Loop Antennas

AU - Ha-Van, Nam

AU - Simovski, Constantin R.

AU - Cuesta, Francisco S.

AU - Jayathurathnage, Prasad

AU - Tretyakov, Sergei A.

N1 - Conference code: 53

PY - 2023

Y1 - 2023

N2 - In this paper, we identify and discuss a regime of radiation suppression in wireless power transfer (WPT) between two loop antennas in free space. We show that at distances much larger than the antenna sizes there is a possibility to realize high power transfer efficiency due to partial compensation of the radiation resistances of both loops by optimizing the load impedance and the working frequency. This regime of WPT is analyzed for two relevant arrangements of these antennas: the coaxial one, when WPT is solely due to near fields, and the coplanar one, when both power transfer mechanisms are combined and the regions of mainly far-field and mainly near-field power transfer can be distinguished. We analyze and visualize the radiation suppression regime for both arrangements. Finally, the theoretical results are validated by simulations and experiments with two loop antennas.

AB - In this paper, we identify and discuss a regime of radiation suppression in wireless power transfer (WPT) between two loop antennas in free space. We show that at distances much larger than the antenna sizes there is a possibility to realize high power transfer efficiency due to partial compensation of the radiation resistances of both loops by optimizing the load impedance and the working frequency. This regime of WPT is analyzed for two relevant arrangements of these antennas: the coaxial one, when WPT is solely due to near fields, and the coplanar one, when both power transfer mechanisms are combined and the regions of mainly far-field and mainly near-field power transfer can be distinguished. We analyze and visualize the radiation suppression regime for both arrangements. Finally, the theoretical results are validated by simulations and experiments with two loop antennas.

KW - magnetic dipole

KW - nearand far-field

KW - radiation suppression regime

KW - Wireless power transfer

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U2 - 10.23919/EuMC58039.2023.10290483

DO - 10.23919/EuMC58039.2023.10290483

M3 - Conference article in proceedings

AN - SCOPUS:85177557665

SP - 600

EP - 603

BT - 2023 53rd European Microwave Conference, EuMC 2023

PB - European Microwave Association

T2 - European Microwave Conference

Y2 - 19 September 2023 through 21 September 2023

ER -

Radiation Suppression Regime in Wireless Power Transfer between Two Loop Antennas

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WEIRD: Wireless capsule Endoscope electronics for Improved Reliability of Diagnosis in digestive tracts (WEIRD)

Aka-Postdoc-Prasad: Self-optimizing wireless power transfer devices

Aalto Electronics-ICT

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Radiation Suppression Regime in Wireless Power Transfer between Two Loop Antennas

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Conference

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Projects

WEIRD: Wireless capsule Endoscope electronics for Improved Reliability of Diagnosis in digestive tracts (WEIRD)

Aka-Postdoc-Prasad: Self-optimizing wireless power transfer devices

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Aalto Electronics-ICT

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