Height Reduction of Circular and Linearly Polarized Magneto-electric Dipole Antenna through Artificial Magnetic Conductor

Document Type : Original Article

Authors
mohammadhossein ashouri 1
saeed fakhte 2
IMAN ARYANIAN 3
1 qom university of technology
2 Qom university of technology
3 assistant professor/ Iran Telecommunication Research Center
10.22034/jssta.2023.398147.1125
Abstract
In this article, a solution for reducing the height of magneto-electric dipole antennas is presented by using an artificial magnetic conductor structure as the antenna's ground plane. In this research, two types of antennas were investigated: The first antenna is linearly polarized and the second antenna is right-handed circularly polarized. In the linearly polarized antenna, a 7 x 7 array of artificial magnetic conductor cells (AMCs) was designed at 3.5 GHz and placed on the antenna's ground plane. By adding artificial magnetic conductor, the height of the first antenna was reduced to 0.16 λ. The simulation results show that the impedance bandwidth for values of |S11|<[-10dB] is equal to 1.9 GHz from the frequency of 2.3 GHz to 4.2 GHz (58.46%), while the measured impedance bandwidth of fabricated prototype is equal to 2.13 GHz from the frequency of 2.21 GHz to 4.34 GHz (65.03%).
The second antenna is a right-handed circularly polarized magneto-electric dipole antenna which is fed by a Y-shaped feed line. By using a 5 x 5 array of AMC on the ground plane of the antenna, its height was reduced to 0.13 λ. The impedance bandwidth resulting from the simulation for values |S11|<[-10dB] is equal to 1.24 GHz from the frequency 2.46 GHz to the frequency of 3.7 GHz (40.25%), while the bandwidth resulting from the measurement of the fabricated prototype is equal to 1.3 GHz from the frequency of 2.38 GHz up to the frequency of 3.68 GHz (44.52%).
 
Keywords
Magneto electric dipole antenna# AMC#Height Reduction# Linear polarization# circular polarization
Subjects
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  • Receive Date 19 May 2023
  • Revise Date 31 July 2023
  • Accept Date 02 October 2023