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Broadband Omnidirectional Rectenna with Integrated Solar Cell for Hybrid Energy Harvesting

Author

Listed:
  • Fei Cheng

    (College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China)

  • Bu-Yun Cheng

    (College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China)

  • Han-Ping Li

    (College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China)

  • Wang Ni

    (National Key Laboratory of Chemical and Physical Power Sources, Tianjin Institute of Power Sources, Tianjin 300384, China)

Abstract

This paper presents a broadband omnidirectional rectenna combined with a solar cell for hybrid energy harvesting, addressing the daytime-only limitation of solar cells via complementary RF energy harvesting. To avoid mutual interaction in integration, the solar cell is placed above the antenna to receive light/EM waves from different directions. A broadband discone antenna ensures omnidirectional RF reception from 1.56 to 6.63 GHz, while a single-stub matching circuit and voltage doubler enable rectifier operation from 1.4 to 3.6 GHz, with over 50% power conversion efficiency at 5 dBm. The measurement demonstrates that the hybrid system can yield 20.25 mW from combined RF/solar power. This broadband hybrid energy harvesting system shows potential for powering sensors throughout the day by integrating two complementary energy sources with minimal interaction.

Suggested Citation

  • Fei Cheng & Bu-Yun Cheng & Han-Ping Li & Wang Ni, 2025. "Broadband Omnidirectional Rectenna with Integrated Solar Cell for Hybrid Energy Harvesting," Energies, MDPI, vol. 18(19), pages 1-18, September.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:19:p:5098-:d:1757889
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