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Patch antenna with multi-cell EBG for RF energy harvesting applications

Published online by Cambridge University Press:  25 August 2022

Sravya R. Venkata*
Affiliation:
Electrical and Electronics Engineering, BITS Pilani – Hyderabad Campus, Hyderabad 500078, India
Vinnakota Sarath Sankar
Affiliation:
Electrical and Electronics Engineering, BITS Pilani – Hyderabad Campus, Hyderabad 500078, India
Runa Kumari
Affiliation:
Electrical and Electronics Engineering, BITS Pilani – Hyderabad Campus, Hyderabad 500078, India
*
Author for correspondence: Sravya R. Venkata, E-mail: sridevisep13@gmail.com

Abstract

In this paper, a ring patch antenna with 1 GHz of bandwidth and three resonances is designed for the RF energy harvesting application. Two complementary split-ring resonators (CSRR) is etched out from the patch, designed at 6.8 GHz, near feed to enhance the bandwidth from 267 MHz to 1 GHz. Due to the introduction of CSRR, two additional resonances at 6.4 and 7.4 GHz are obtained with gain 5.5 and 0.2 dB respectively. The gains at 6.8 and 7.4 GHz are enhanced to 8.3 and 2 dB respectively by cascaded circular mushroom electromagnetic bandgap structures (EBGs) with circular symmetry designed around the antenna. This ring patch antenna with cascaded EBG is integrated with a rectifier circuit based on voltage doubler topology (rectenna). The results of the rectenna show that, for an input power of 7 dBm to the rectifier circuit, a DC output voltage of 1.2 V with a power conversion efficiency of 40% is achieved.

Type
Wireless Power Transfer and Energy Harvesting
Copyright
© The Author(s), 2022. Published by Cambridge University Press in association with the European Microwave Association

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