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Design of a High-Gain Reflector-Based Slotted Antenna for RF Energy Harvesting Application

International Journal of Electrical and Electronics Engineering
© 2025 by SSRG - IJEEE Journal
Volume 12 Issue 9
Year of Publication : 2025
Authors : Nilesh A. Lakade, Shankar D. Nawale
10.14445/23488379/IJEEE-V12I9P109
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How to Cite?

Nilesh A. Lakade, Shankar D. Nawale, "Design of a High-Gain Reflector-Based Slotted Antenna for RF Energy Harvesting Application," SSRG International Journal of Electrical and Electronics Engineering, vol. 12,  no. 9, pp. 89-97, 2025. Crossref, https://doi.org/10.14445/23488379/IJEEE-V12I9P109

Abstract:

This study presents the design, analysis, and implementation of a rectenna system (rectifying antenna) optimized for RF energy harvesting in IoT applications. With the exponential growth of low-power IoT devices, sustainable power solutions are increasingly critical. Our work introduces a novel heptagonal patch antenna with strategically placed slots functioning at 2.45 GHz. The design fabricated on FR4 achieves a substantial gain improvement from 2.63 dBi to 6.1 dBi at 2.45 GHz and 11.5 dBi at 2.42 GHz through the integration of a reflector positioned 20 mm behind the antenna. A voltage doubler rectifier circuit utilizing SMS7630-079LF Schottky diodes successfully converts the harvested RF energy to DC power. The proposed rectenna provides a DC output voltage (VDC) of 180.8 mV placed at 45 cm from the commercial Wi-Fi router, demonstrating the solution's suitability for powering low-energy IoT devices. This cost-effective approach addresses key issues in IoT deployment by eliminating dependencies on conventional batteries and providing a sustainable alternative power for smart city applications, including agriculture, healthcare, smart factories, and transportation.

Keywords:

Antenna, Energy harvesting, IoT, Rectenna.

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