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In high-conductivity media, near-field magnetic information transmission exhibits the advantages of low loss and strong anti-interference capability. Based on this advantage, this paper proposes a Near-Field Simultaneous Wireless Information and Power Transfer (NF-SWIPT) system. Using a time-switching SWIPT method, the system achieves simultaneous information and power transfer via the magnetic field. Simulations show that when the signal-to-noise ratio (SNR) is 35 dB, the NF-SWIPT system increases bandwidth efficiency by a factor of six and improves energy transmission efficiency by \(10^4\) times compared to traditional electromagnetic wave-based SWIPT systems.

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Simultaneous Signal and Energy Transfer Mechanism for Near-Field Magnetic Induction Communication Based on SWIPT Time Switching

  • 会议论文

  • 发表日期：

    2025年

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  • Jiahao Ge,
  • Yufang Zhang,
  • Peng Wang,
  • Xinhang Lu,
  • Haoqi Wei,
  • Chen Chen

摘要

In high-conductivity media, near-field magnetic information transmission exhibits the advantages of low loss and strong anti-interference capability. Based on this advantage, this paper proposes a Near-Field Simultaneous Wireless Information and Power Transfer (NF-SWIPT) system. Using a time-switching SWIPT method, the system achieves simultaneous information and power transfer via the magnetic field. Simulations show that when the signal-to-noise ratio (SNR) is 35 dB, the NF-SWIPT system increases bandwidth efficiency by a factor of six and improves energy transmission efficiency by \(10^4\) times compared to traditional electromagnetic wave-based SWIPT systems.