A Compact Five-Band Omnidirectional RF Ambient Energy Harvesting System for IoT Applications
A compact multiband RF energy harvesting system designed for IoT applications is proposed, operating at 0.94 GHz, 1.8 GHz, 2.1 GHz, 2.6 GHz, and 3.5 GHz. The RF system consists of an omnidirectional modified monopole antenna, a compact multiband rectifier, and an energy management module. In order t...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2025-01-01
|
| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/11004013/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849732804708925440 |
|---|---|
| author | Wenjun Wang Jingwei Zhang Xin Sun Haoran Zu Daping He |
| author_facet | Wenjun Wang Jingwei Zhang Xin Sun Haoran Zu Daping He |
| author_sort | Wenjun Wang |
| collection | DOAJ |
| description | A compact multiband RF energy harvesting system designed for IoT applications is proposed, operating at 0.94 GHz, 1.8 GHz, 2.1 GHz, 2.6 GHz, and 3.5 GHz. The RF system consists of an omnidirectional modified monopole antenna, a compact multiband rectifier, and an energy management module. In order to achieve omnidirectional radiation patterns and compact size, the antenna current distribution is carefully controlled to avoid high-order modes of traditional monopoles. The overall size of the proposed rectenna is <inline-formula> <tex-math notation="LaTeX">$0.24\lambda _{L}\times 0.22\lambda _{L}$ </tex-math></inline-formula> (the wavelength at the lowest frequency), and the rectenna achieves the power conversion efficiency (PCE) of 19.2% at 0.94 GHz, 24% at 1.8 GHz, 24.5% at 2.1 GHz, 17.7% at 2.6 GHz, and 16.4% at 3.5 GHz with an incident power level of -20 dBm. In addition, the proposed RF system provides an <inline-formula> <tex-math notation="LaTeX">$18.7~\mu $ </tex-math></inline-formula>W peaking output DC power in outdoor ambient environments and powers a commercial temperature sensor as a demonstration. The experimental results highlight that the proposed RF system achieves multiband operation and a stable omnidirectional radiation pattern, offering enhanced frequency coverage in a compact size and competitive efficiency. It has the potential for efficient ambient energy harvesting and powering IoT devices. |
| format | Article |
| id | doaj-art-076a7295aa3d4f1eb6f5a1d6cdd3322a |
| institution | DOAJ |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-076a7295aa3d4f1eb6f5a1d6cdd3322a2025-08-20T03:08:13ZengIEEEIEEE Access2169-35362025-01-0113861108611910.1109/ACCESS.2025.356984311004013A Compact Five-Band Omnidirectional RF Ambient Energy Harvesting System for IoT ApplicationsWenjun Wang0Jingwei Zhang1https://orcid.org/0000-0003-0657-6193Xin Sun2Haoran Zu3https://orcid.org/0000-0002-9721-7593Daping He4https://orcid.org/0000-0002-0284-4990School of Physics and Mechanics, Wuhan University of Technology, Wuhan, ChinaSchool of Physics and Mechanics, Wuhan University of Technology, Wuhan, ChinaSchool of Physics and Mechanics, Wuhan University of Technology, Wuhan, ChinaSchool of Physics and Mechanics, Wuhan University of Technology, Wuhan, ChinaSchool of Physics and Mechanics, Wuhan University of Technology, Wuhan, ChinaA compact multiband RF energy harvesting system designed for IoT applications is proposed, operating at 0.94 GHz, 1.8 GHz, 2.1 GHz, 2.6 GHz, and 3.5 GHz. The RF system consists of an omnidirectional modified monopole antenna, a compact multiband rectifier, and an energy management module. In order to achieve omnidirectional radiation patterns and compact size, the antenna current distribution is carefully controlled to avoid high-order modes of traditional monopoles. The overall size of the proposed rectenna is <inline-formula> <tex-math notation="LaTeX">$0.24\lambda _{L}\times 0.22\lambda _{L}$ </tex-math></inline-formula> (the wavelength at the lowest frequency), and the rectenna achieves the power conversion efficiency (PCE) of 19.2% at 0.94 GHz, 24% at 1.8 GHz, 24.5% at 2.1 GHz, 17.7% at 2.6 GHz, and 16.4% at 3.5 GHz with an incident power level of -20 dBm. In addition, the proposed RF system provides an <inline-formula> <tex-math notation="LaTeX">$18.7~\mu $ </tex-math></inline-formula>W peaking output DC power in outdoor ambient environments and powers a commercial temperature sensor as a demonstration. The experimental results highlight that the proposed RF system achieves multiband operation and a stable omnidirectional radiation pattern, offering enhanced frequency coverage in a compact size and competitive efficiency. It has the potential for efficient ambient energy harvesting and powering IoT devices.https://ieeexplore.ieee.org/document/11004013/RF energy harvesting systemcompact omnidirectional antennafive-band rectifierspower conversion efficiency (PCE)rectennas |
| spellingShingle | Wenjun Wang Jingwei Zhang Xin Sun Haoran Zu Daping He A Compact Five-Band Omnidirectional RF Ambient Energy Harvesting System for IoT Applications IEEE Access RF energy harvesting system compact omnidirectional antenna five-band rectifiers power conversion efficiency (PCE) rectennas |
| title | A Compact Five-Band Omnidirectional RF Ambient Energy Harvesting System for IoT Applications |
| title_full | A Compact Five-Band Omnidirectional RF Ambient Energy Harvesting System for IoT Applications |
| title_fullStr | A Compact Five-Band Omnidirectional RF Ambient Energy Harvesting System for IoT Applications |
| title_full_unstemmed | A Compact Five-Band Omnidirectional RF Ambient Energy Harvesting System for IoT Applications |
| title_short | A Compact Five-Band Omnidirectional RF Ambient Energy Harvesting System for IoT Applications |
| title_sort | compact five band omnidirectional rf ambient energy harvesting system for iot applications |
| topic | RF energy harvesting system compact omnidirectional antenna five-band rectifiers power conversion efficiency (PCE) rectennas |
| url | https://ieeexplore.ieee.org/document/11004013/ |
| work_keys_str_mv | AT wenjunwang acompactfivebandomnidirectionalrfambientenergyharvestingsystemforiotapplications AT jingweizhang acompactfivebandomnidirectionalrfambientenergyharvestingsystemforiotapplications AT xinsun acompactfivebandomnidirectionalrfambientenergyharvestingsystemforiotapplications AT haoranzu acompactfivebandomnidirectionalrfambientenergyharvestingsystemforiotapplications AT dapinghe acompactfivebandomnidirectionalrfambientenergyharvestingsystemforiotapplications AT wenjunwang compactfivebandomnidirectionalrfambientenergyharvestingsystemforiotapplications AT jingweizhang compactfivebandomnidirectionalrfambientenergyharvestingsystemforiotapplications AT xinsun compactfivebandomnidirectionalrfambientenergyharvestingsystemforiotapplications AT haoranzu compactfivebandomnidirectionalrfambientenergyharvestingsystemforiotapplications AT dapinghe compactfivebandomnidirectionalrfambientenergyharvestingsystemforiotapplications |