Design of Multi-Band RF Energy and Solar Hybrid Harvesting Circuit for Passive IoT

LIANG Xiao; JIANG Lingyun

doi:10.11959/j.issn.2096-3750.WLW26043

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Design of Multi-Band RF Energy and Solar Hybrid Harvesting Circuit for Passive IoT

更新时间：2026-06-30

- Design of Multi-Band RF Energy and Solar Hybrid Harvesting Circuit for Passive IoT
- Chinese Journal on Internet of Things (2026)
- 作者机构：
  
  南京邮电大学通信与信息工程学院，江苏省南京市210000
- 作者简介：
- 基金信息：
- DOI：10.11959/j.issn.2096-3750.WLW26043
  CLC： TN82
- Received：16 April 2026，
  
  Revised：2026-05-18，
  
  Accepted：30 June 2026，
- 稿件说明：
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LIANG Xiao, JIANG Lingyun. Design of Multi-Band RF Energy and Solar Hybrid Harvesting Circuit for Passive IoT[J/OL]. Chinese Journal on Internet of Things, 2026.
DOI：

LIANG Xiao, JIANG Lingyun. Design of Multi-Band RF Energy and Solar Hybrid Harvesting Circuit for Passive IoT[J/OL]. Chinese Journal on Internet of Things, 2026. DOI： 10.11959/j.issn.2096-3750.WLW26043.

摘要

针对现有无源物联网能量采集方案存在单频段射频适配性差、多能量源整合效率低、阻抗匹配设计不精准，且单一供能模式受环境影响大、能量输出稳定性不足等问题，设计了一款集成最大功率点跟踪(Maximum Power Point Tracking

MPPT)的射频能-太阳能混合环境能量收集电路。针对传统结构普遍存在的电压低，高插入损耗的缺点，提出了改进传统倍压结构，采用单端接地级联输出方式，实现多支路射频电压高效直流叠加，实现接近14.8V的开路电压和0dBm输入时1.363mW的最佳输出功率，相对于传统结构开路电压提升近四倍，最佳输出功率提升约7.5%，带载能力也有显著提升。同时，以BQ25504为核心设计双输入能量管理电路，针对太阳能与射频能MPPT系数的差异，采用两路独立MPPT适配+二极管防倒灌结构，实现双能量源独立最大功率跟踪与协同供电，保障能量稳定输出。

Abstract

To solve the problems existing in conventional passive Internet of Things energy harvesting schemes

including poor adaptability of single-band RF energy harvesting

low efficiency of multi-source integration

inaccurate impedance matching

and unstable output under variable environments

a dual-channel RF–solar hybrid energy harvesting circuit with Maximum Power Point Tracking (MPPT) was proposed in this paper. An improved voltage multiplier with single-ended grounded cascaded output was designed to realize efficient DC stacking of RF voltages. An open-circuit voltage of nearly 14.8 V and a maximum output power of 1.363 mW were achieved at 0 dBm input power. Compared with traditional structures

the open-circuit voltage was increased nearly fourfold

and the output power was improved by approximately 7.5%. A dual-input energy management module based on BQ25504 was adopted

in which independent MPPT control was implemented for RF and solar inputs with diode reverse-current protection. Coordinated operation and stable energy output are realized in the whole system.

关键词

Keywords

references

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