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Compact high efficiency circularly polarized rectenna based on artificial magnetic conductor

Published online by Cambridge University Press:  03 May 2019

Lin Li ,
Xue-Xia Yang ,
Geliang Zhu ,
Qi Luo  and
Steven Gao
Lin Li
Affiliation:
Shanghai Institute of Advanced Communication and Data Science, Key laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai 200444, China
Xue-Xia Yang*
Affiliation:
Shanghai Institute of Advanced Communication and Data Science, Key laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai 200444, China
Geliang Zhu
Affiliation:
Shanghai Institute of Advanced Communication and Data Science, Key laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai 200444, China
Qi Luo
Affiliation:
School of Engineering and Digital Arts, University of Kent, Canterbury CT2 7NT, UK
Steven Gao
Affiliation:
School of Engineering and Digital Arts, University of Kent, Canterbury CT2 7NT, UK
*
Author for correspondence: Xue-Xia Yang, E-mail: yang.xx@shu.edu.cn
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Abstract

A compact circularly polarized (CP) rectenna with low profile and high efficiency based on the artificial magnetic conductor (AMC) is proposed in this paper. The receiving CP antenna is a coplanar stripline fed dual rhombic loop with an AMC reflector. The proposed AMC reflector not only improves the antenna gain to 9.8 dBi but also decreases the profile to 0.1 λ0. The AMC reflector also makes the antenna have a harmonic suppression function so the low pass filter between the rectifying circuit and the antenna could be omitted and the rectenna has a compact structure. According to the measured results, the rectenna has the highest conversion efficiency of 76% on the load of 240 Ω with the received power of 117.5 mW. When the linearly polarized transmitting antenna is rotated, the conversion efficiency of the CP rectenna maintains a constant high conversion efficiency of 74%. The compact structure and CP operation of the rectenna made it a good candidate of the wireless battery for some electronic devices and far-distance microwave power transmission.

Keywords

Artificial magnetic conductor (AMC)circular polarizationconversion efficiencycoplanar stripline (CPS)rectennas
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 11 , Issue 9 , November 2019 , pp. 975 - 982
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019 

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