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Magnetic-electric dipole circularly polarized antenna with unidirectional radiation pattern with improved characteristics

Published online by Cambridge University Press:  11 December 2023

Seied Ali Banihashem ,
Pejman Mohammadi Open the ORCID record for Pejman Mohammadi [Opens in a new window]  and
Yashar Zehforoosh Open the ORCID record for Yashar Zehforoosh [Opens in a new window]
Seied Ali Banihashem
Affiliation:
Department of Electrical Engineering, Urmia Branch, Islamic Azad University, Urmia, Iran
Pejman Mohammadi*
Affiliation:
Microwave and Antenna Research Center, Urmia Branch, Islamic Azad University, Urmia, Iran
Yashar Zehforoosh
Affiliation:
Microwave and Antenna Research Center, Urmia Branch, Islamic Azad University, Urmia, Iran
*
Corresponding author: Pejman Mohammadi; Email: p.mohammadi@iaurmia.ac.ir
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Abstract

In this paper, a compact unidirectional antenna consisting of a planar electric dipole and a shortened connecting element is introduced. This antenna is excited by a Γ-shaped feeding line. A wide impedance bandwidth in the frequency range of 1.3–3.3 GHz is observed in the output performance. Sufficient main lobe and low level back lobe have been introduced as other characteristics of the structure, based on radiation patterns. The antenna design process is evaluated step-by-step and using parametric study based on the antenna geometry. One of the main features of the desired antenna is the realization of circular polarization in a high percentage of the operational bandwidth 1.5–3.3 GHz. The radiation patterns of the orthogonal planes E-field and H-field along with the left-handed and right-handed circular polarization patterns for the desired antenna have been extracted and analyzed. A three-dimensional structure in the form of stacked stepped disks (SSD) is introduced to increase overall performance of antenna. There is an acceptable similarity between the E-field and H-field page patterns, which shows the accuracy of the design process. On the other hand, for studying the circular polarization, left-handed and right-handed patterns based on the main beam direction and orthogonal polarization level have acceptable performance. The maximum overall gain of the antenna in the designed frequency band is near to 13 dB.

Keywords

circular polariztiondipoleMagnetic-electricwide impedance bandwidth
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , First View , pp. 1 - 8
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Copyright
© Islamic Azad University of Urmia Branch, 2023. Published by Cambridge University Press in association with the European Microwave Association

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