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High-efficiency antenna-to-antenna polarization converters for customized polarization angle deflection

Published online by Cambridge University Press:  10 February 2020

Manlan Deng*
Affiliation:
College of Physical Science and Technology of Yichun University, Yichun336000, Jiangxi, China
*
Author for correspondence: Manlan Deng, E-mail: deng-manlan@163.com

Abstract

In this paper, an antenna-to-antenna method to design high-efficiency polarization converters was proposed. Two in-linked split ring resonators (SRRs) were used as the fundamental unit cell, which can effectively make the original linear polarization angle deflected into a customized one (include but not limited to 90°). The same as the process of energy reception and transmitting of microstrip symmetric dipole antennas, the top SRR plays the role of a receiving antenna and the bottom one acts as a transmitting antenna. Under normal illumination, the strong coupling between electric resonance and magnetic resonance can result in high transmission and broad bandwidth. Since the two SRRs act as two independently polarization selective components, the polarization angle of transmitted waves can be easily controlled by rotating the transmitting SRRs around the center. The proposed concept and the design method are validated using numerical simulations, as well as experimental results of three examples for 45, 60 and 90° polarization angle rotation, the polarization conversion ratio of which is about 92.2, 88.9 and 91.9% from 7.5 to 10 GHz.

Type
Metamaterials and Photonics Bandgap Structures
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2020

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