volume | PIER Journals

2017-08-24

Archimedean Spiral Antenna with Two Opposite Uni-Directional Circularly Polarized Radiation Bands Designed by Resonance Based Reflectors

Ji-Yang Xie,

Dr. Ji-Yang Xie

Guilin University of Electronic Technology

China

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Lin Peng,

Dr. Lin Peng

Institute of Applied Physics

University of Electronic Science and Technology of China

China

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Bao-Jian Wen,

Dr. Bao-Jian Wen

Guilin University of Electronic Technology

China

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Xing Jiang

Dr. Xing Jiang

School of Information and Communication Engineering

Guilin University of Electronic and Technology

China

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Progress In Electromagnetics Research Letters, Vol. 70, 23-30, 2017

doi:10.2528/PIERL17062010

Abstract

Two opposite uni-directional radiation bands with good circular polarization (CP) characteristics are achieved in an Archimedean Spiral Antenna (ASA). A sandwich configuration is formed by utilizing two resonance based reflectors (RBRs) at the bottom and top sides of the ASA. Owing to the resonance characteristic, the RBRs do not act as reflectors at the other operational band, then, opposite uni-directional radiations are obtained, and the two uni-directional bands can be tuned independently. The proposed ASA with two uni-directional bands (ASA-TUB) has a wide impedance bandwidth about 4.4:1 (1.8-8 GHz), while its front-fire band (FFB) ranges from 1.8 GHz to 2.2 GHz (20.0%), and its back-fire band (BFB) is 4.4-7.1 GHz (46.9%) for front-to-back ratio (FBR) larger than 5 dB. The maximal FBRs for the FFB and BFB are 11.3 dB and 20 dB, respectively. Moreover, good CP performances are also obtained for the FFB and BFB. Besides, the whole profile of the proposed antenna is only 0.16 λ at the lowest operational frequency. The proposed antenna has the properties of dual opposite uni-directional radiation bands, low profile, good FBR and CP.

Citation

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Ji-Yang Xie, Lin Peng, Bao-Jian Wen, and Xing Jiang, "Archimedean Spiral Antenna with Two Opposite Uni-Directional Circularly Polarized Radiation Bands Designed by Resonance Based Reflectors," Progress In Electromagnetics Research Letters, Vol. 70, 23-30, 2017.
doi:10.2528/PIERL17062010

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