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Related Experiment Video

Updated: Jan 4, 2026

Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
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Design of a 900 MHz Dual-Mode SWIPT for Low-Power IoT Devices.

Hamed Abbasizadeh1, Sang Yun Kim2, Behnam Samadpoor Rikan3

  • 1Department of Electrical and Computer Engineering, University of California at San Diego, La Jolla, CA 92093, USA. habbasizadeh@ucsd.edu.

Sensors (Basel, Switzerland)
|October 31, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a dual-mode simultaneous wireless information and power transceiver (SWIPT) for IoT devices, enabling battery-free operation through adaptive power management and efficient energy harvesting for self-powered communication.

Keywords:
IoT devicesPAPRRF energy harvesterinformation decodingreconfigurablesimultaneous wireless information and power transceiver

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Area of Science:

  • Electrical Engineering
  • Wireless Communication
  • Internet of Things

Background:

  • Simultaneous Wireless Information and Power Transfer (SWIPT) is crucial for enabling battery-free Internet of Things (IoT) devices.
  • Existing SWIPT systems face challenges in efficiently managing harvested energy and supporting diverse communication modes.
  • Adaptive power management is essential for optimizing performance in varying RF power conditions.

Purpose of the Study:

  • To propose a novel duty cycle-based, dual-mode SWIPT system for IoT devices.
  • To enable adaptive control between single-tone and multitone communication modes based on received power.
  • To achieve self-powering and energy-neutral operation for information decoding transceivers.

Main Methods:

  • Implemented an adaptive power-splitting (PS) ratio control scheme to distribute RF energy between energy harvesting (EH) and information decoding (ID) paths.
  • Developed a sensor node for monitoring received power and adaptively switching communication modes.
  • Utilized a peak-to-average power ratio (PAPR) scheme for multitone signal demodulation at low input power levels.
  • Designed and validated a SWIPT printed circuit board (PCB) operating at 900 MHz.

Main Results:

  • Achieved self-powering of the ID transceiver above 20 dBm input power, enabling a battery-free network.
  • Optimized PS ratio of 0.44 provided sufficient harvested energy for self-powering and energy-neutral operation.
  • Demonstrated demodulation of Amplitude-Shift Keying (ASK) and Binary Phase-Shift Keying (BPSK) signals.
  • Measured SWIPT sensitivity of -7 dBm and peak RF energy harvester efficiency of 69% at 20 dBm input power.
  • Achieved a maximum data rate of 4 Mbps with the ability to demodulate 4-ASK and BPSK signals simultaneously.

Conclusions:

  • The proposed dual-mode SWIPT architecture effectively supports battery-free IoT devices.
  • Adaptive power management and communication mode selection enhance transceiver efficiency and performance.
  • The system demonstrates practical feasibility for energy-neutral wireless communication networks.