Towards Solution-Processed RF Rectennas: Experimental Characterization and Non-Linear Modelling based on ZnO Nanogap Diodes

Wagih, M. and Georgiadou, D. G. (2022) Towards Solution-Processed RF Rectennas: Experimental Characterization and Non-Linear Modelling based on ZnO Nanogap Diodes. In: 29th IEEE International Conference on Electronics, Circuits and Systems (ICECS 2022), Glasgow, UK, 24-26 Oct 2022, ISBN 9781665488235 (doi: 10.1109/ICECS202256217.2022.9971051)

Abstract

The growing demands of the IoT market call for novel ultra-low-cost RF semiconductor devices. Using GHz-frequency Schottky diodes fabricated on a wafer-scale, low-cost natively flexible rectennas and RF energy harvesters can be realized. This paper will present, for the first time, the non-linear model followed by antenna-circuit co-design for solution-processed Zinc-Oxide (ZnO) Schottky diodes. The diode's equiv-alent circuit model is extracted and compared to experimental on-wafer characterization showing very good agreement up to 40 GHz. Using a complex-impedance source emulating a printable rectenna, the designed voltage doubler rectifier shows a power conversion efficiency up to 70% in the UHF RFID band (0.915 GHz). The optimum source and load impedance parameters for a single-series and voltage-doubler rectifier are finally presented, showing that ZnO nano-gap diodes can be adopted in future rectenna designs.

• Item Type: Conference Proceedings
• Additional Information: M. Wagih was supported by the UK Royal Academy of Engineering and the Office of the Chief Science Adviser for National Security under the UK Intelligence Community Research Fellowship programme. D. G. Georgiadou acknowledges support from the UKRI Future Leaders Fellowship Grant (MR/V024442/1).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Wagih, Dr Mahmoud
• Authors: Wagih, M., and Georgiadou, D. G.
• College/School: College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity
• ISBN: 9781665488235
• Copyright Holders: Copyright © 2022 IEEE
• First Published: First published in 2022 29th IEEE International Conference on Electronics, Circuits and Systems (ICECS)
• Publisher Policy: Reproduced in accordance with the publisher copyright policy

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