1 μW-3.75 W dual-mode near/far-field wearable wireless power transfer using a hybrid rectenna
1 μW-3.75 W dual-mode near/far-field wearable wireless power transfer using a hybrid rectenna
While far-field wireless power transfer (WPT)promises a long range of operation, it falls short on the DC powerwhich can be provided. On the other, hand resonant near-fieldWPT suffers from a short wireless range. In this work, a dual mode high/low-power near/far-field rectenna is demonstrated for the first time based on a flexible rectifier and a textile antenna. Based on a high-efficiency single-series rectifier, the far-field rectenna achieves a peak efficiency of 42.7% from an ultra low power density of 0.43 μW/cm2, with a 1 V DC output from4 μW/cm2. A high-power 6.78 MHz bridge rectifier is designed and implemented on a flexible textile-based substrate with a10 dB return loss for inputs above 15 dBm. As a near-field receiver, the antenna could receive 3.75 W DC power at 5 cm from the transmitting coil, with an end-to-end efficiency of 30%inclusive of rectifier, coils, and power amplifier losses. Based on the proposed dual-mode antenna, textile-based wearables could be wirelessly powered dynamically using resonant near-field and radiative near-field WPT.
WPT, SAR, low-power, Wireless power transfer, hybrid wireless power, dual-mode, multi-mode WPT, simultaneous near and far-field WPT, rectennas, coils, antennas, rectifiers, high-power WPT, wearable WPT, battery-free wearables, MR-WPT, magnetic resonant power tranfer, near-field WPT, far-field WPT, wireless charging
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Komolafe, Abiodun
5e79fbab-38be-4a64-94d5-867a94690932
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d
28 March 2022
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Komolafe, Abiodun
5e79fbab-38be-4a64-94d5-867a94690932
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d
Wagih, Mahmoud, Komolafe, Abiodun, Weddell, Alex S. and Beeby, Steve
(2022)
1 μW-3.75 W dual-mode near/far-field wearable wireless power transfer using a hybrid rectenna.
In IEEE Wireless Power Week (WPW 2022).
IEEE.
4 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
While far-field wireless power transfer (WPT)promises a long range of operation, it falls short on the DC powerwhich can be provided. On the other, hand resonant near-fieldWPT suffers from a short wireless range. In this work, a dual mode high/low-power near/far-field rectenna is demonstrated for the first time based on a flexible rectifier and a textile antenna. Based on a high-efficiency single-series rectifier, the far-field rectenna achieves a peak efficiency of 42.7% from an ultra low power density of 0.43 μW/cm2, with a 1 V DC output from4 μW/cm2. A high-power 6.78 MHz bridge rectifier is designed and implemented on a flexible textile-based substrate with a10 dB return loss for inputs above 15 dBm. As a near-field receiver, the antenna could receive 3.75 W DC power at 5 cm from the transmitting coil, with an end-to-end efficiency of 30%inclusive of rectifier, coils, and power amplifier losses. Based on the proposed dual-mode antenna, textile-based wearables could be wirelessly powered dynamically using resonant near-field and radiative near-field WPT.
Text
Wagih_WPW22_HighP_DynamicRange_WPT
- Accepted Manuscript
More information
Published date: 28 March 2022
Venue - Dates:
IEEE Wireless Power Week (WPW 2022), , Bordeaux, France, 2022-07-05 - 2022-07-08
Keywords:
WPT, SAR, low-power, Wireless power transfer, hybrid wireless power, dual-mode, multi-mode WPT, simultaneous near and far-field WPT, rectennas, coils, antennas, rectifiers, high-power WPT, wearable WPT, battery-free wearables, MR-WPT, magnetic resonant power tranfer, near-field WPT, far-field WPT, wireless charging
Identifiers
Local EPrints ID: 456787
URI: http://eprints.soton.ac.uk/id/eprint/456787
PURE UUID: 1ecb8cd6-4cce-46b7-bc27-2392bb735fa6
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Date deposited: 11 May 2022 16:43
Last modified: 27 Jul 2024 04:02
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Contributors
Author:
Mahmoud Wagih
Author:
Abiodun Komolafe
Author:
Alex S. Weddell
Author:
Steve Beeby
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