Wireless energy transfer: Dielectric lens antennas for beam shaping in wireless power-transfer applications

Ricardo Gonçalves; Nuno B. Carvalho; Pedro Pinho

doi:10.1016/j.crhy.2016.11.004

Wireless energy transfer: Dielectric lens antennas for beam shaping in wireless power-transfer applications
[Transfert d'énergie sans fil : antennes diélectriques pour la mise en forme des faisceaux dans les applications de transfert d'énergie sans fil]

Ricardo Gonçalves ^1,² ; Nuno B. Carvalho ^1,² ; Pedro Pinho ^2,³

¹ DETI, University of Aveiro, Aveiro, Portugal
² Instituto de Telecomunicações, Aveiro, Portugal
³ Instituto Superior de Engenharia de Lisboa, Lisboa, Portugal

Comptes Rendus. Physique, Volume 18 (2017) no. 2, pp. 78-85.

Résumé
Abstract

Dans la compétition actuelle entre les systèmes sans fil, la dernière frontière reste la coupure du cordon électrique. Dans ce sens, l'intérêt des technologies de transfert d'énergie sans fil a crû exponentiellement au cours des dernières années. Cependant, de nombreux défis à surmonter demeurent pour qu'on puisse déployer à son plein potentiel le transfert d'énergie sans fil. L'un des objectifs poursuivis dans le cadre du développement de tels systèmes est la conception d'antennes à très haut gain, très efficaces, qui permettraient de compenser les pertes liées à la propagation des signaux radio dans l'air. Dans cet article, nous explorons la conception et la fabrication de lentilles diélectriques, réalisées à l'aide d'une imprimante 3D de bureau de qualité professionnelle. Les antennes à lentilles sont utilisées en vue d'accroître l'efficacité du réseau et donc de maximiser celle d'un système de transfert d'énergie actif aux fréquences des micro-ondes dans la bande $K_{u}$ . Les mesures réalisées sur deux prototypes mettent en évidence une grande directivité, ainsi que les simulations le prédisaient.

In the current contest of wireless systems, the last frontier remains the cut of the power cord. In that sense, the interest over wireless energy transfer technologies in the past years has grown exponentially. However, there are still many challenges to be overcome in order to enable wireless energy transfer full potential. One of the focus in the development of such systems is the design of very-high-gain, highly efficient, antennas that can compensate for the propagation loss of radio signals over the air.

In this paper, we explore the design and manufacturing process of dielectric lenses, fabricated using a professional-grade desktop 3D printer. Lens antennas are used in order to increase beam efficiency and therefore maximize the efficiency of a wireless power-transfer system operating at microwave frequencies in the $K_{u}$ band. Measurements of two fabricated prototypes showcase a large directivity, as predicted with simulations.

Publié le : 2016-12-09

DOI : 10.1016/j.crhy.2016.11.004

Keywords: Lens antennas, Wireless power transfer, 3D Printing
Mot clés : Antennes lentilles, Transfert d'énergie sans fil, Impression 3D

Affiliations des auteurs :

Ricardo Gonçalves ^{1, 2} ; Nuno B. Carvalho ^{1, 2} ; Pedro Pinho ^{2, 3}

¹ DETI, University of Aveiro, Aveiro, Portugal
² Instituto de Telecomunicações, Aveiro, Portugal
³ Instituto Superior de Engenharia de Lisboa, Lisboa, Portugal

@article{CRPHYS_2017__18_2_78_0,
     author = {Ricardo Gon\c{c}alves and Nuno B. Carvalho and Pedro Pinho},
     title = {Wireless energy transfer: {Dielectric} lens antennas for beam shaping in wireless power-transfer applications},
     journal = {Comptes Rendus. Physique},
     pages = {78--85},
     publisher = {Elsevier},
     volume = {18},
     number = {2},
     year = {2017},
     doi = {10.1016/j.crhy.2016.11.004},
     language = {en},
}

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Ricardo Gonçalves; Nuno B. Carvalho; Pedro Pinho. Wireless energy transfer: Dielectric lens antennas for beam shaping in wireless power-transfer applications. Comptes Rendus. Physique, Volume 18 (2017) no. 2, pp. 78-85. doi : 10.1016/j.crhy.2016.11.004. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2016.11.004/

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