Wireless Power Transfer in the Radiative Near Field

Okan Yurduseven; Vinay Gowda; Guy Lipworth; Tomislav Zupan; Matthew  Reynolds; David  Smith

doi:10.1109/LAWP.2016.2542138

Wireless Power Transfer in the Radiative Near Field

Okan Yurduseven, Vinay Gowda, Guy Lipworth, Tomislav Zupan, Matthew Reynolds, David Smith

School of Electronics, Electrical Engineering and Computer Science

Research output: Contribution to journal › Article › peer-review

115 Citations (Scopus)

Abstract

A scheme for wireless power transfer (WPT) in the radiative near-field (Fresnel) region is presented. The proposed Fresnel WPT scheme is designed to focus microwaves to a diffraction-limited region where a detector can be positioned, achieving reasonably high power transfer efficiency over moderate distances. The configuration consists of transmit and receive microstrip patch array antennas, with the receiving antenna connected to a power-harvesting half-wave rectifier (rectenna). Fresnel region operation enables the fields radiated by the transmitting aperture to be localized both in range and cross-range. Using Fresnel region focusing, we achieve an increase of 66.8% in the amount of received power when compared to the performance of a conventional beamforming array. We also demonstrate the efficiency improvement by powering an LED using the on-axis and off-axis focusing configurations.

Original language	English
Pages (from-to)	1865-1868
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	15
DOIs	https://doi.org/10.1109/LAWP.2016.2542138
Publication status	Published - 15 Mar 2016

Keywords

Wireless Power Transfer
Antennas
Near-Field
Electromagnetic Focusing

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Cite this

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title = "Wireless Power Transfer in the Radiative Near Field",

abstract = "A scheme for wireless power transfer (WPT) in the radiative near-field (Fresnel) region is presented. The proposed Fresnel WPT scheme is designed to focus microwaves to a diffraction-limited region where a detector can be positioned, achieving reasonably high power transfer efficiency over moderate distances. The configuration consists of transmit and receive microstrip patch array antennas, with the receiving antenna connected to a power-harvesting half-wave rectifier (rectenna). Fresnel region operation enables the fields radiated by the transmitting aperture to be localized both in range and cross-range. Using Fresnel region focusing, we achieve an increase of 66.8% in the amount of received power when compared to the performance of a conventional beamforming array. We also demonstrate the efficiency improvement by powering an LED using the on-axis and off-axis focusing configurations.",

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T1 - Wireless Power Transfer in the Radiative Near Field

AU - Yurduseven, Okan

AU - Gowda, Vinay

AU - Lipworth, Guy

AU - Zupan, Tomislav

AU - Reynolds, Matthew

AU - Smith, David

PY - 2016/3/15

Y1 - 2016/3/15

N2 - A scheme for wireless power transfer (WPT) in the radiative near-field (Fresnel) region is presented. The proposed Fresnel WPT scheme is designed to focus microwaves to a diffraction-limited region where a detector can be positioned, achieving reasonably high power transfer efficiency over moderate distances. The configuration consists of transmit and receive microstrip patch array antennas, with the receiving antenna connected to a power-harvesting half-wave rectifier (rectenna). Fresnel region operation enables the fields radiated by the transmitting aperture to be localized both in range and cross-range. Using Fresnel region focusing, we achieve an increase of 66.8% in the amount of received power when compared to the performance of a conventional beamforming array. We also demonstrate the efficiency improvement by powering an LED using the on-axis and off-axis focusing configurations.

AB - A scheme for wireless power transfer (WPT) in the radiative near-field (Fresnel) region is presented. The proposed Fresnel WPT scheme is designed to focus microwaves to a diffraction-limited region where a detector can be positioned, achieving reasonably high power transfer efficiency over moderate distances. The configuration consists of transmit and receive microstrip patch array antennas, with the receiving antenna connected to a power-harvesting half-wave rectifier (rectenna). Fresnel region operation enables the fields radiated by the transmitting aperture to be localized both in range and cross-range. Using Fresnel region focusing, we achieve an increase of 66.8% in the amount of received power when compared to the performance of a conventional beamforming array. We also demonstrate the efficiency improvement by powering an LED using the on-axis and off-axis focusing configurations.

KW - Wireless Power Transfer

KW - Antennas

KW - Near-Field

KW - Electromagnetic Focusing

U2 - 10.1109/LAWP.2016.2542138

DO - 10.1109/LAWP.2016.2542138

M3 - Article

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VL - 15

SP - 1865

EP - 1868

JO - IEEE Antennas and Wireless Propagation Letters

JF - IEEE Antennas and Wireless Propagation Letters

ER -

Wireless Power Transfer in the Radiative Near Field

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Keywords

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