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Compact and ultra-wideband high-efficiency rectifier using asymmetric coupled-line impedance transformer

Published online by Cambridge University Press:  25 November 2024

Fei Cheng Open the ORCID record for Fei Cheng [Opens in a new window] ,
Chun-Hong Du ,
Li Wu  and
Chao Gu Open the ORCID record for Chao Gu [Opens in a new window]
Fei Cheng
Affiliation:
College of Electronics and Information Engineering, Sichuan University, Chengdu, China National Key Laboratory of Chemical and Physical Power Sources, Tianjin Institute of Power Sources, Tianjin, PR China
Chun-Hong Du
Affiliation:
College of Electronics and Information Engineering, Sichuan University, Chengdu, China
Li Wu*
Affiliation:
College of Electronics and Information Engineering, Sichuan University, Chengdu, China
Chao Gu
Affiliation:
Centre for Wireless Innovation, ECIT Institute, Queen’s University Belfast, Belfast, UK
*
Corresponding author: Li Wu; Email: [email protected]
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Abstract

This paper presents a compact and ultra-wideband high-efficiency microwave rectifier for wireless power transmission (WPT) applications. The input-matching-network utilizes a compact asymmetric coupled transmission line structure, contributing to wideband performance. The rectifier adopts a voltage-doubler topology, resulting in a smooth input impedance across a wide bandwidth. The working principle of the asymmetric coupled transmission line matching network is analyzed. Simulation and measurement are conducted on the proposed rectifier. The fabricated prototype demonstrates a wide bandwidth of 162.5% (0.3–2.9 GHz with the power conversion efficiency (PCE) exceeding 60% at an input power of 18 dBm. Even at an input power of 10 dBm, the measured PCE remains above 50% over the working band. The proposed ultra-wideband rectifier shows promising potential for WPT applications including wireless powering of low-power electronic devices and sensors.

Keywords

power conversion efficiencyrectifierwidebandwireless power transmission
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 16 , Issue 6 , July 2024 , pp. 966 - 971
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with The European Microwave Association.

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