Impact of Software-Defined Radio Transmitter on the Efficiency of RF Wireless Power Transfer

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Abstract

In this paper, we experimentally examine the impact of a digital radio transmitter on radio-frequency (RF) wireless power transfer (WPT). The test-bed for this purpose consists of a software-defined radio (SDR) transmitter, an external power amplifier (PA), a variable attenuator to emulate the high losses in wireless propagation, and an RF energy harvesting receiver. The test-bed facilitates determining the transmitter efficiency and overall DC-DC efficiency of different test waveforms for RF WPT. We assess the performance of multisine signals as well as an information-bearing quadrature phase-shift keying (QPSK) signal for RF WPT, under different channel conditions, by determining the transmitter, DC-DC and receiver efficiency. The experiments reveal that high peak-to-average power ratio constraints the maximum RF output power for multisine signals. Even with similar input average power, single sinusoid RF waveforms yield the highest DC-DC and receiver efficiency. Moreover, a QPSK signal with transmit filtering provides good efficiency for WPT and seems to be a waveform suitable for simultaneous wireless information and power transfer applications.
Original languageEnglish
Title of host publication2020 IEEE Wireless Power Transfer Conference (WPTC)
PublisherIEEE
Pages83-86
Number of pages4
ISBN (Electronic)978-1-7281-4238-8
DOIs
Publication statusPublished - 1 Nov 2020
Publication typeA4 Article in a conference publication
EventIEEE Wireless Power Transfer Conference - Seoul, Korea, Republic of
Duration: 15 Nov 202019 Nov 2020

Publication series

Name
ISSN (Print)2474-0225
ISSN (Electronic)2573-7651

Conference

ConferenceIEEE Wireless Power Transfer Conference
Country/TerritoryKorea, Republic of
CitySeoul
Period15/11/2019/11/20

Keywords

  • Wireless power transfer
  • Conferences
  • Wireless power transfer (WPT)
  • RF energy harvesting
  • software-defined radio (SDR)
  • non-linear distortion

Publication forum classification

  • Publication forum level 1

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