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Battery-free wireless node powered using high-efficiency harvesting of 900 MHz GFSK- modulated packets with a compact rectenna

Battery-free wireless node powered using high-efficiency harvesting of 900 MHz GFSK- modulated packets with a compact rectenna
Battery-free wireless node powered using high-efficiency harvesting of 900 MHz GFSK- modulated packets with a compact rectenna
Radio Frequency (RF) Simultaneous Wireless Information and Power Transfer (SWIPT) has attracted significant interest with a range of SWIPT-specific rectenna implementations. However, the impact of modulated waveforms on a capacitor charging time remains unknown, and a system powered off packets us yet to be demonstrated. This paper presents an RF-powered sub-1 GHz sensor node through modulated packages with a sub-0 dBm sensitivity without any DC-DC power management circuitry. Using Gaussian Frequency Shift Keying (GFSK) modulated signals from a commercial IoT transceiver, the RF-DC power conversion efficiency (PCE) is investigated for both a resistive and capacitive load. It is shown that GFSK modulation with varying data rates has minimal influence on the PCE. A miniaturized rectenna is demonstrated charging a supercapacitor powering a sub-1 GHz sensor node for over 32 s, charged using 40 GFSK packets transmitted in 62 s, at 1.6 m from a 4 W circularly-polarized source at 900 MHz. The demonstrated rectenna exhibits over an order of magnitude improvement in the sensitivity over previous works harvesting modulated packets.
GFSK, FSK, modulated, modulation, modulated WPT, wireless power packets, wireless power transfer, wireless power transmission, energy harvesting, packets, SWIPT, simultaneous wireless information and power transfer (SWIPT), wireless sensor nodes, WSNs, RF-powered nodes, packet-powered nodes
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693

Wagih, Mahmoud (2022) Battery-free wireless node powered using high-efficiency harvesting of 900 MHz GFSK- modulated packets with a compact rectenna. IEEE Wireless Power Week (WPW 2022), , Bordeaux, France. 05 - 08 Jul 2022. (In Press)

Record type: Conference or Workshop Item (Paper)

Abstract

Radio Frequency (RF) Simultaneous Wireless Information and Power Transfer (SWIPT) has attracted significant interest with a range of SWIPT-specific rectenna implementations. However, the impact of modulated waveforms on a capacitor charging time remains unknown, and a system powered off packets us yet to be demonstrated. This paper presents an RF-powered sub-1 GHz sensor node through modulated packages with a sub-0 dBm sensitivity without any DC-DC power management circuitry. Using Gaussian Frequency Shift Keying (GFSK) modulated signals from a commercial IoT transceiver, the RF-DC power conversion efficiency (PCE) is investigated for both a resistive and capacitive load. It is shown that GFSK modulation with varying data rates has minimal influence on the PCE. A miniaturized rectenna is demonstrated charging a supercapacitor powering a sub-1 GHz sensor node for over 32 s, charged using 40 GFSK packets transmitted in 62 s, at 1.6 m from a 4 W circularly-polarized source at 900 MHz. The demonstrated rectenna exhibits over an order of magnitude improvement in the sensitivity over previous works harvesting modulated packets.

Text
Wagih_WPW22_Modulated_Packets_WPT - Accepted Manuscript
Restricted to Repository staff only until 5 July 2022.
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More information

Accepted/In Press date: 28 March 2022
Venue - Dates: IEEE Wireless Power Week (WPW 2022), , Bordeaux, France, 2022-07-05 - 2022-07-08
Keywords: GFSK, FSK, modulated, modulation, modulated WPT, wireless power packets, wireless power transfer, wireless power transmission, energy harvesting, packets, SWIPT, simultaneous wireless information and power transfer (SWIPT), wireless sensor nodes, WSNs, RF-powered nodes, packet-powered nodes

Identifiers

Local EPrints ID: 456794
URI: http://eprints.soton.ac.uk/id/eprint/456794
PURE UUID: 2d37abeb-4aea-43d2-b5e7-caa2bdfe6ec9
ORCID for Mahmoud Wagih: ORCID iD orcid.org/0000-0002-7806-4333

Catalogue record

Date deposited: 11 May 2022 16:47
Last modified: 12 May 2022 02:01

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Contributors

Author: Mahmoud Wagih ORCID iD

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