2.45 GHz Wi-Fi band operated circularly polarized rectenna for RF energy harvesting in smart city applications

Daasari Surender, Md. Ahsan Halimi, Taimoor Khan, Fazal A. Talukdar, Shiban K. Koul and Yahia M.M. Antar

Journal of Electromagnetic Waves and Applications, 2022, vol. 36, issue 3, 407-423

Abstract: This article proposes a single band circularly polarized (CP) rectenna operate at a 2.45 GHz Wi-Fi band, using a hexagonal shape of a microstrip radiator and a voltage doubler rectifier for smart city applications. A partial ground plane embedded with isosceles triangular slot and notch helps in obtaining the desired resonance characteristics with improved antenna performance and reasonable miniaturization. Two crossed-slots, introduced into the radiating patch, yield CP characteristics. Also, the proposed antenna shows an omnidirectional radiational behavior that helps in harvesting RF energy from all of its surroundings. A voltage doubler configuration using the SMS7630-005 LF diode is chosen for designing a rectifier circuit to achieve a maximum conversion efficiency of 65.1% and an output voltage of 1.65 V at an input power of 0 dBm for the load resistance value of 4.1 kΩ which is very much suitable for powering low power sensing devices.

Date: 2022
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DOI: 10.1080/09205071.2021.1970030

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