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Body-proximity effects on the input impedance of a complex-conjugate SWIPT textile rectenna

Body-proximity effects on the input impedance of a complex-conjugate SWIPT textile rectenna
Body-proximity effects on the input impedance of a complex-conjugate SWIPT textile rectenna
While a range of Simultaneous Wireless Information and Power Transfer (SWIPT) rectennas were proposed for wearables, the human-proximity effects on a complex-conjugate matching network-free rectenna remain mostly unknown. This paper reports for the first time the impact of human proximity on a complex conjugate rectenna's impedance. The impedance of a dual-mode SWIPT microstrip/dipole rectenna is measured experimentally for varying separation from the body and on different body positions. The measured input impedance is used to simulate the rectifier's RF-to-DC efficiency using a non-linear model showing the effects of the power level, load, and frequency on the DC output for different on-body impedances.
SWIPT, rectenna, simultaneous wireless information and power transfer (SWIPT), antenna, wearable antenna, RF enregy harvesting, human proximity, antenna body coupling, impedance matching, complex conjugate, complex impedance, rectifiers, antenna rectifier co-design
IEEE
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d

Wagih, Mahmoud, Weddell, Alex S. and Beeby, Steve (2022) Body-proximity effects on the input impedance of a complex-conjugate SWIPT textile rectenna. In IEEE Antennas and Propagation Symposium. IEEE. 2 pp . (In Press)

Record type: Conference or Workshop Item (Paper)

Abstract

While a range of Simultaneous Wireless Information and Power Transfer (SWIPT) rectennas were proposed for wearables, the human-proximity effects on a complex-conjugate matching network-free rectenna remain mostly unknown. This paper reports for the first time the impact of human proximity on a complex conjugate rectenna's impedance. The impedance of a dual-mode SWIPT microstrip/dipole rectenna is measured experimentally for varying separation from the body and on different body positions. The measured input impedance is used to simulate the rectifier's RF-to-DC efficiency using a non-linear model showing the effects of the power level, load, and frequency on the DC output for different on-body impedances.

Text
Wagih_APS22_SWIPT_ZBody - Accepted Manuscript
Restricted to Repository staff only until 18 July 2022.
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More information

Accepted/In Press date: 24 March 2022
Venue - Dates: 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, , Denver, United States, 2022-07-10 - 2022-07-15
Keywords: SWIPT, rectenna, simultaneous wireless information and power transfer (SWIPT), antenna, wearable antenna, RF enregy harvesting, human proximity, antenna body coupling, impedance matching, complex conjugate, complex impedance, rectifiers, antenna rectifier co-design

Identifiers

Local EPrints ID: 456801
URI: http://eprints.soton.ac.uk/id/eprint/456801
PURE UUID: c9afa8c0-4b87-4bd9-9206-dbf661a10e62
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: 11 May 2022 16:48
Last modified: 12 May 2022 02:01

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Contributors

Author: Mahmoud Wagih ORCID iD
Author: Alex S. Weddell ORCID iD
Author: Steve Beeby ORCID iD

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