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Broadband millimeter-wave textile-based flexible rectenna for wearable energy harvesting

Broadband millimeter-wave textile-based flexible rectenna for wearable energy harvesting
Broadband millimeter-wave textile-based flexible rectenna for wearable energy harvesting
Millimeter-Wave (mmWave) bands, a key part of future 5G networks, represent a potential channel for RF energy harvesting, where the high-gain antenna arrays offer improved end-to-end efficiency compared to sub-6 GHz networks. This paper presents a broadband mmWave rectenna, the first rectenna realized on a flexible textile substrate for wearable applications. The proposed novel antenna’s bandwidth extends from 23 to 40 GHz, with a minimum radiation efficiency of 67% up to 30 GHz, over 3 dB improvement compared to a standard patch. A stable gain of more than 8 dB is achieved based on a textile reflector plane. The antenna is directly connected to a textile based microstrip voltage doubler rectifier utilizing commercial Schottky diodes. The rectifier is matched to the antenna using a tapered line feed for high-impedance matching, achieving broadband high voltage-sensitivity. The rectifier has a peak RF DC efficiency of 12% and a 9.5 dBm 1 V sensitivity from 23 to 24.25 GHz. The integrated rectenna is demonstrated with more than 1.3-V DC output from 12 dBm of mmWave wireless power across a 28% fractional bandwidth from 20 to 26.5 GHz, a 15% half-power fractional bandwidth, and a peak output of 6.5V from 20 dBm at 24 GHz.
Antennas, Bandwidth, Broadband antennas, Broadband communication, Internet of Things, Microstrip antennas, RF energy harvesting (RFEH), Rectennas, Substrates, broadband matching networks, microstrip antennas, rectennas, rectifier, wearable antenna, wireless power transfer (WPT)
0018-9480
4960-4972
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Hilton, Geoffrey S.
3edc9be4-ad15-4964-8093-953874cb9d94
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Hilton, Geoffrey S.
3edc9be4-ad15-4964-8093-953874cb9d94
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d

Wagih, Mahmoud, Hilton, Geoffrey S., Weddell, Alex S. and Beeby, Steve (2020) Broadband millimeter-wave textile-based flexible rectenna for wearable energy harvesting. IEEE Transactions on Microwave Theory and Techniques, 68 (11), 4960-4972. (doi:10.1109/TMTT.2020.3018735).

Record type: Article

Abstract

Millimeter-Wave (mmWave) bands, a key part of future 5G networks, represent a potential channel for RF energy harvesting, where the high-gain antenna arrays offer improved end-to-end efficiency compared to sub-6 GHz networks. This paper presents a broadband mmWave rectenna, the first rectenna realized on a flexible textile substrate for wearable applications. The proposed novel antenna’s bandwidth extends from 23 to 40 GHz, with a minimum radiation efficiency of 67% up to 30 GHz, over 3 dB improvement compared to a standard patch. A stable gain of more than 8 dB is achieved based on a textile reflector plane. The antenna is directly connected to a textile based microstrip voltage doubler rectifier utilizing commercial Schottky diodes. The rectifier is matched to the antenna using a tapered line feed for high-impedance matching, achieving broadband high voltage-sensitivity. The rectifier has a peak RF DC efficiency of 12% and a 9.5 dBm 1 V sensitivity from 23 to 24.25 GHz. The integrated rectenna is demonstrated with more than 1.3-V DC output from 12 dBm of mmWave wireless power across a 28% fractional bandwidth from 20 to 26.5 GHz, a 15% half-power fractional bandwidth, and a peak output of 6.5V from 20 dBm at 24 GHz.

Text
Wagih_TMTT2020_mmWave_Textile_Rectenna - Accepted Manuscript
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More information

Accepted/In Press date: 4 August 2020
Published date: November 2020
Keywords: Antennas, Bandwidth, Broadband antennas, Broadband communication, Internet of Things, Microstrip antennas, RF energy harvesting (RFEH), Rectennas, Substrates, broadband matching networks, microstrip antennas, rectennas, rectifier, wearable antenna, wireless power transfer (WPT)

Identifiers

Local EPrints ID: 442988
URI: http://eprints.soton.ac.uk/id/eprint/442988
ISSN: 0018-9480
PURE UUID: 1313fdda-d5f2-4358-9ec4-5adea211a80a
ORCID for Mahmoud Wagih: ORCID iD orcid.org/0000-0002-7806-4333
ORCID for Alex S. Weddell: ORCID iD orcid.org/0000-0002-6763-5460
ORCID for Steve Beeby: ORCID iD orcid.org/0000-0002-0800-1759

Catalogue record

Date deposited: 05 Aug 2020 16:30
Last modified: 16 Sep 2021 11:16

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