A circularly polarized antenna with electromagnetic bandgap structures

In this paper, we propose a novel method to increase the axial ratio bandwidth of a circularly polarized microstrip patch antenna. Demonstrated method consists of polarization dependent rectangular-shaped mushroom-like electromagnetic bandgap structures positioned around circularly polarized radiato...

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Bibliographic Details
Published in2015 Computational Electromagnetics International Workshop (CEM) pp. 1 - 2
Main Authors Uysal, Alican, Isık, Cevdet
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2015
Subjects
Bandwidth
Metamaterials
Microstrip
Microstrip antenna arrays
Microstrip antennas
Periodic structures
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Summary:In this paper, we propose a novel method to increase the axial ratio bandwidth of a circularly polarized microstrip patch antenna. Demonstrated method consists of polarization dependent rectangular-shaped mushroom-like electromagnetic bandgap structures positioned around circularly polarized radiator patch. Since the structure itself has a polarization-dependent behavior, it was seen that a secondary minimum point can be introduced in the frequency dependency of axial ratio in main lobe direction. Additionally, increment in maximum gain is achieved as a result of natural characteristics of electromagnetic bandgap structures. Simulations made by HFSS show that axial ratio bandwidth can be increased using polarization-dependent electromagnetic bandgap structures. In this configuration, 3-dB axial ratio bandwidth can be broadened significantly.
ISBN:9781467392792
1467392790
DOI:10.1109/CEM.2015.7237414